Electrospun LiFePO4/C Composite Fiber Membrane as a Binder-Free, Self-Standing Cathode for Power Lithium-Ion Battery.

A LiFePO4/C composite fiber membrane was fabricated by the electrospinning method and subsequent thermal treatment. The thermal decomposition process was analyzed by TG/DSC, the morphology, microstructure and composition were studied using SEM, TEM, XRD, Raman, respectively. The results indicated that the prepared LiFePO4/C composite fibers were composed of nanosized LiFePO4 crystals and amorphous carbon coatings, which formed a three dimensional (3D) long-range networks, greatly enhanced the electronic conductivity of LiFePO4 electrode up to 3.59× 10-2 S · cm-2. The 3D LiFePO4/C fiber membrane could be directly used as a binder-free, self-standing cathode for lithium-ion battery, and exhibited an improved capacity and rate performance. The LiFePO4/C composite electrode delivered a discharge capacity of 116 mAh·g-1, 109 mAh·g-1, 103 mAh·g-1, 91 mAh·g-1, 80 mAh·g-1 at 0.1 C, 0.5 C, 1 C, 3 C, 5 C, respectively. And a stable cycling performance was also achieved that the specific capacity could retain 75 mA·g-1 after 500 cycles at 5 C. Therefore, this LiFePO4/C composite fiber membrane was promising to be used as a cathode for power lithium ion battery.

Tunable Synthesis, Characterization and Magnetic Properties of Core­Shell Cu@M (M = Co or Ni) Nanowires.

The ultralong Cu@M (M = Co or Ni) nanowires (NWs) with core­shell structure were fabricated by a simple method by using the prepared Cu NWs as template. The crystal phases of Cu@M (M = Co or Ni) NWs were confirmed by X-ray diffraction (XRD). The morphology and microstructure of NWs were characterized by scanning electro microscopy (SEM) and transmission electro microscopy (TEM). Different diameters of Cu@M (M = Co or Ni) NWs varying from 120 to 550 nm with length about 10 µm were obtained via controlling the amounts of cobalt (nickel) nitrates in the reduction process. The magnetic properties of samples were measured using vibrating sample magnetometer (VSM). Results revealed that Cu NWs has a characteristic of paramagnetism after coating Co or Ni. The coercivity (H(c)) values of Cu@ Ni and Cu@Co NWs were 114.6 and 102.5 Oe, respectively. Possible formation mechanism for Cu@M (M = Co or Ni) NWs was preliminarily proposed.

Effect of Nickel Coated Multi-Walled Carbon Nanotubes on Electrochemical Performance of Lithium-Sulfur Rechargeable Batteries.

Conventional lithium-sulfur batteries suffer from severe capacity fade, which is induced by low electron conductivity and high dissolution of intermediated polysulfides. Recent studies have shown the metal (Pt, Au, Ni) as electrocatalyst of lithium polysulfides and improved the performance for lithium sulfur batteries. In this work, we present the nickel coated multi-walled carbon nanotubes (Ni-MWNTs) as additive materials for elemental sulfur positive electrodes for lithium-sulfur rechargeable batteries. Compared with MWNTs, the obtained Ni-MWNTs/sulfur composite cathode demonstrate a reversible specific capacity approaching 545 mAh after 200 cycles at a rate of 0.5C as well as improved cycling stability and excellent rate capacity. The improved electrochemical performance can be attributed to the fact the MWNTs shows a vital role on polysulfides adsorption and nickel has a catalytic effect on the redox reactions during charge­discharge process. Meanwhile, the Ni-MWNTs is a good electric conductor for sulfur cathode.

Three-layer structure microwave absorbers based on nanocrystalline alpha-Fe, Fe0.2(Co0.2Ni0.8)0.8 and Ni0.5Zn0.5Fe2O4 porous microfibers.

The three-layer structure microwave absorbers with thickness of 2 mm were designed based on nanocrystalline alpha-Fe, Fe0.2(Co0.2Ni0.8)0.8 and Ni0.5Zno.sFe204 porous microfibers with diameters about 2-5 microm. The electromagnetic parameters and microwave absorption properties were investigated by vector network analyzer in the frequency range of 2-18 GHz. The results show that the three-layer structure microwave absorbers display stronger absorption properties in a wide frequency range than the single-layer and double-layer microwave absorber. For the three-layer structure, the microwave absorption properties are mainly influenced by the microfibers layer arrangement order, total thickness and each layer thickness. When the Ni0.5Zn0.5Fe2O4 porous microfibers layer is arranged as the impedance-matching surface layer, with a total thickness of 2 mm consisting of 0.7 mm thick alpha-Fe porous microfibers inner layer, 0.9 mm thick Fe0.2(Co0.2Ni0.8)0.8 porous microfibers medium layer and 0.4 mm thick impedance-matching surface layer, the three-layer structure has a strongest microwave absorption of 45.7 dB at 12.8 GHz, the absorption bandwidth (with RL < -10 dB ) of 10.2 GHz from 7.8 GHz to 18 GHz and bandwidth (with RL < -20 dB) of 4.4 GHz from 11.1 GHz to 15.5 GHz respectively. This three-layer structure is promising microwave absorbers to meet the requirements of thin thickness, light weight and wide band for military and civil applications.

Formation and soot combustion of honeycomb-like LaFeO3 microfibers.

The nanocrystalline, honeycomb-like, perovskite LaFeO3 microfibers with a fibre diameter about 1-2 microm and channel sizes about 180-220 nm on the cross-section were prepared by the citrate-gel process. These microfibers were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and Brunauere-Emmette-Teller (BET) method. After calcined at a low temperature of 550 degrees C for 6 hours, the single phase of perovskite LaFeO3 microfibers is formed and the grain size increases from 27 to 38 nm with the calcination temperature increasing from 500 to 650 degrees C. The catalytic activity for soot combustion was analyzed by thermo-gravimetric method (TG), and the LaFeO3 microfibers calcined at 600 degrees C exhibits the highest catalytic activity for soot combustion, with a lowest T50 (393 degrees C) and T90 (434 degrees C). The formation mechanism of the honeycomb-like structure is analyzed and these honeycomb-like microfibers can be used as advanced catalysts, absorbents, filters and microreactors.

Removal of heavy metals and dyes by supported nano zero-valent iron on barium ferrite microfibers.

The binary nano zero-valent iron/barium ferrite (NZVI/BFO) microfibers with uniform diameters and high porosity were prepared by the organic gel-thermal selective reduction process. The composite microfibers are fabricated from nano zero-valent iron and nano BaFe12O19 grains. The effects of pH, adsorbent dosage, and contact time on the adsorption of heavy metals and dyes have been investigated. The adsorption isotherms of heavy metals and dyes on the microfibers are well described by the Langmuir model, in which the estimated adsorption capacities are 14.5, 29.9, 68.3 and 110.4 mg/g for Pb(II), As(V), Congo red and methylene blue, respectively. After five cycles, these microfibers still exhibit a high removal efficiency for As(V), Pb(II), Congo red and methylene blue. The enhanced adsorption characteristics can be attributed to the porous structure, strong surface activity and electronic hopping. Therefore, the magnetic NZVI/BFO microfibers can be used as an efficient, fast and high capacity adsorbent for heavy metals and dyes removal.

Microwave absorption of sandwich structure based on nanocrystalline SrFe12O19, Ni0.5ZnO.5Fe2O4 and alpha-Fe hollow microfibers.

The microwave absorption properties of sandwich structural absorbers based on the nanocrystalline strontium ferrite (SrFe12O19), NiZn ferrite (Ni0.5Zn0.5Fe2O4) and alpha-iron (alpha-Fe) hollow microfibers with diameters of 1-3 microm have been investigated in the frequency range of 2-18 GHz. The sandwich absorbers composed of nanocrystalline ferrite hollow microfibers as the outer or inner layer, and the nanocrystalline alpha-Fe hollow microfibers as the interlayer, have strong microwave absorption with a broad band and thin thickness. Their microwave absorption properties in 2-18 GHz are mainly influenced by the arrangement, each layer thickness and total thickness. It finds that the sandwich absorber with 1.6 mm thick SrFe12O19 microfibers as the outer layer, 0.2 mm thick alpha-Fe microfibers as the interlayer and 0.2 mm thick Ni0.5Zn0.5Fe2O4 microfibers as the inner layer, exhibits an optimal reflection loss (RL) value of -120.1 dB at 13.2 GHz and the bandwidth with RL exceeding -10 dB covers 83% of X-band (8.2-12.4 GHz) and the whole K(u)-band (12.4-18 GHz). This enhancement microwave absorption can be attributed to the unique coupling of the nanocrystalline ferrite and alpha-Fe hollow microfibers arising from the shape anisotropy, interface and small size effects.

PDOL-Based Solid Electrolyte Toward Practical Application: Opportunities and Challenges.

Polymer solid-state lithium batteries (SSLB) are regarded as a promising energy storage technology to meet growing demand due to their high energy density and safety. Ion conductivity, interface stability and battery assembly process are still the main challenges to hurdle the commercialization of SSLB. As the main component of SSLB, poly(1,3-dioxolane) (PDOL)-based solid polymer electrolytes polymerized in-situ are becoming a promising candidate solid electrolyte, for their high ion conductivity at room temperature, good battery electrochemical performances, and simple assembly process. This review analyzes opportunities and challenges of PDOL electrolytes toward practical application for polymer SSLB. The focuses include exploring the polymerization mechanism of DOL, the performance of PDOL composite electrolytes, and the application of PDOL. Furthermore, we provide a perspective on future research directions that need to be emphasized for commercialization of PDOL-based electrolytes in SSLB. The exploration of these schemes facilitates a comprehensive and profound understanding of PDOL-based polymer electrolyte and provides new research ideas to boost them toward practical application in solid-state batteries.

Magnetic core-shell nano-TiO2/Al2O3/NiFe2O4 microparticles with enhanced photocatalytic activity.

The core-shell nano-TiO2/Al2O3/NiFe2O4 microparticles of 5-8 microm were prepared by the heterogeneous precipitation followed by calcination treatment. The morphologies, structure, crystalline phase, and magnetic property were characterized by optical biomicroscopy (OBM), scanning electron microscopy (SEM), X-ray diffractometry (XRD) and vibrating sample magnetometer (VSM) respectively. The photocatalytic activity was evaluated by degrading methyl orange solution either under UV light and sunlight. The results indicate that the nano-TiO2 layer consists of needle-like nanoparticles and the intermediate layer of Al2O3 avoids the nano-TiO2 agglomeration, shedding and uneven loading. The nano-TiO2/Al2O3/NiFe2O4 composite particles show high magnetization of 31.5 emu/g and enhanced photocatalytic activity to completely degrade 50 mg/L methyl orange solution either under UV light and sun light. The enhanced activity of the composite is attributed to the unique structure, insulation effect of Al2O3 intermediate layer and the hybrid effect of anatase TiO2 and NiFe2O4. The obtained catalyst may be magnetically separable and useful for many practical applications due to the improved photocatalytic properties under sunlight.

Catalytic activity of nanocrystalline porous La0.8K0.2Fe(1-x)Mn(x)O3 for simultaneous removal of soot and nitrogen oxides.

The nanocrystalline, porous, perovskite La0.8K0.2Fe(1-x)Mn(x)O3 (x = 0-0.5) catalysts were prepared by the citrate-gel process. All the perovskite catalysts can effectively catalyze the soot combustion and among them the La0.8K0.2Fe0.7Mn0.3O3 catalyst exhibits the highest catalytic activity, with a lowest T50 (366 degrees C). This optimized La0.8K0.2Fe0.7Mn0.3O3 catalyst then was coated onto a honeycomb ceramic by the citrate-gel assisted dip-coating method and its catalytic performance was evaluated by the bench test in the practical exhaust emission. It is proved that the La0.8K0.2Fe0.7Mn0.3O3-coated honeycomb ceramic device simultaneously has a effective capture of soot particulates and a good absorption of NO(x) from the exhaust emission at a low temperature and begins to efficiently catalyze oxidization reactions of the soot particulates at around 230 degrees C, and conversion of NO(x) at about 290 degrees C, with a conversion rate of 16.6% at 400 degrees C. This catalytic performance enhancement for simultaneous removal of soot and NO(x) can be largely attributed to the synergistic effect of Fe and Mn, pore structure of a large channel with various small pores connected, and microstructural characteristics of La0.8K0.2Fe0.7Mn0.3O3 catalyst. The catalytic mechanism of capture-oxidation-reduction is rationally proposed.

Porous Cu/Ce-K-O nanocomposites for simultaneous removal of soot and NO(x) from diesel exhaust emission.

The porous xCu/(1 - x)Ce-K-O (x = 0.1-0.4) nanocomposites were prepared by the citrate-gel thermal decomposition and reduction process. The effect of nanosized metallic Cu on their microstructure and catalytic properties was investigated by XRD, SEM, BET, TG analysis. With Cu content increasing, the grain size of metallic Cu is increased from 40 nm to 62 nm, whilst the grain size of CeO2 decreases from 38 nm to 20 nm. While, their specific surface area (S(BET)) and average pore size (P(ave)) show an increasing trend with the Cu content increase in the nanocomposites. The catalytic activity for soot combustion is influenced by the Cu content, with a lowest T20 (216 degrees C) and T50 (357 degrees C) for xCu/(1 - x)Ce-K-O (x = 0.3) nanocomposite catalyst. The catalytic performance for the optimal xCu/(1 - x)Ce-K-O (x = 0.3) nanocomposite coated honeycomb ceramic device was evaluated under the practical diesel exhaust emissions at the temperature range of 200-400 degrees C. This 10 wt.% catalyst-loaded honeycomb ceramic device confirms a high catalytic activity and stability for simultaneous removal of soot and NO(x), largely,due to the porous structure and synergistic effect of nano Cu and nano ceria in the catalyst.

Three-dimensional Ni foam supported NiCoO2@Co3O4 nanowire-on-nanosheet arrays with rich oxygen vacancies as superior bifunctional catalytic electrodes for overall water splitting.

Earth abundant transition metal oxide (EATMO)-based bifunctional catalysts for overall water splitting are highly desirable, but their performance is far from satisfactory due to low intrinsic activities of EATMOs toward electrocatalysis of both oxygen and hydrogen evolution reactions and poor electron transfer and transport capabilities. A three-dimensional (3-D) Ni-foam-supported NiCoO2@Co3O4 nanowire-on-nanosheet heterostructured array with rich oxygen vacancies has been synthesized, showing OER activity superior to most reported catalysts and even much higher than Ru and Ir-based ones and HER activity among the highest reported for non-noble-metal-based catalysts. The excellent activities are ascribed to the highly dense, ultrathin nanowire arrays epitaxially grown on an interconnected layered nanosheet array greatly facilitating electron transfer and providing numerous electrochemically accessible active sites and the high content of oxygen vacancies on nanowires greatly promoting OER and HER. When adopted as bifunctional electrodes for overall water splitting, this heterostructure shows an overvoltage (at 10 mA cm-2) lower than most reported electrolyzers and high stability. This work not only creates a 3-D EATMO-based integrated heterostructure as a low-cost, highly efficient bifunctional catalytic electrode for water splitting, but also provides a novel strategy to use unique heteronanostructures with rich surface defects for synergistically enhancing electrocatalytic activities.

Dynamically self-assembled adenine-mediated synthesis of pristine graphene-supported clean Pd nanoparticles with superior electrocatalytic performance toward formic acid oxidation.

Pd-based catalysts with maximized exposure of active sites, ultrafast electron transport, and cocatalyst-promoted intrinsic activity are highly desirable for the formic acid oxidation reaction (FAOR), but their fabrication presents a formidable challenge. For the first time, dynamic self-assembly of adenine has been utilized for growth of ultrasmall, highly dispersed, and clean Pd NPs on pristine graphene. The obtained nanohybrid shows remarkably enhanced FAOR catalytic activity and durability compared to Pd NPs directly grown on pristine graphene and commercial Pd/C. The activity is also among the highest for Pd-based catalysts. The excellent catalytic performance is due to well-dispersed, ultrasmall, and clean Pd NPs intimately grown on pristine graphene offering numerous electrochemically accessible active sites and preserving high intrinsic catalytic activity of Pd, great cocatalytic effect of pristine graphene enhancing CO tolerance and intrinsic activity of Pd, and robust attachment of Pd with high CO tolerance on graphene providing high durability. This study develops a facile, mild, and economical strategy to create pristine graphene supported clean Pd NPs with outstanding FAOR catalytic performance, and also sheds light on the mechanism of dynamically self-assembled adenine-mediated synthesis, which is extendable to fabricate other nanohybrids.

A Multifunctional Gradient Solid Electrolyte Remarkably Improving Interface Compatibility and Ion Transport in Solid-State Lithium Battery.

Solid electrolytes with both interface compatibility and efficient ion transport have been an urgent technical requirement for the practical application of solid-state lithium batteries. Herein, a multifuctional poly(1,3-dioxolane) (PDOL) electrolyte combining the gradient structure from the solid state to the gel state with the Li6.4La3Zr1.4Ta0.6O12 (LLZTO) interfacial modification layer was designed, in which the "solid-to-gel" gradient structure greatly improved the electrode/electrolyte interface compatibility and ion transport, while the solid PDOL and LLZTO layers effectively improved the interface stability of the electrolyte/lithium anode and the inhibition of the lithium dendrites via their high mechanical strength and forming a stable interfacial SEI composite film. This gradient PDOL/LLZTO composite electrolyte possesses a high ionic conductivity of 2.9 × 10-4 S/cm with a wide electrochemical window up to 4.9 V vs Li/Li+. Compared with the pristine PDOL electrolyte and PDOL solid electrolyte membrane coated with a layer of LLZTO, the gradient PDOL/LLZTO composite electrolyte shows better electrode/electrolyte interfacial compatibility, lower interface impedance, and smaller polarization, resulting in enhanced rate and cycle performances. The NCM622/PDOL-LLZTO/Li battery can be stably cycled 200 times at 0.3C and 25 °C. This multifunctional gradient structure design will promote the development of high-performance solid electrolytes and is expected to be widely used in solid-state lithium batteries.

Integrating high ionic conductive PDOL solid/gel composite electrolyte for enhancement of interface combination and lithium dentrite inhibition of solid-state lithium battery.

High interface impedance, slow ion transmission, and easy growth of lithium dendrites in solid-state lithium battery are main obstacles to its development and application. Good interface combination and compatibility between electrolyte and electrodes is an important way to solve these problems. In this work, we successfully combined a high ionic conductive polymerized 1,3-dioxolane (PDOL) solid-state electrolyte and a PDOL gel-state electrolyte to form a rigid-flexible composite structural electrolyte and realized the gelation modification of solid electrolyte/electrode interface. This "PDOL SE + PDOL Gel" composite structure not only improves the electrode/electrolyte interfacial contact, reduces the interfacial impedance, but also inhibits the growth of lithium dendrites in the interface between lithium anode and electrolyte by forming an uniform Li-Zr-O and LiF composite protection layer. This composite electrolyte has high ionic conductivity of 5.96 × 10-4 S/cm and wide electrochemical stability window of 5.0 V. The Li/PDOL SE + PDOL Gel/Li cells can be cycled stably for nearly 400 h at a current density of 1.0 mA/cm2. The assembled LiCoO2/PDOL SE + PDOL Gel/Li cells can be cycled for 250 cycles at 0.5 C with a capacity retention of 80%. This PDOL solid/gel composite electrolyte shows high promising commercial application prospect due to its high security performance, excellent interfacial properties and dendrite inhibition ability.

In situ self-assembled N-rich carbon on pristine graphene as a highly effective support and cocatalyst of short Pt nanoparticle chains for superior electrocatalytic activity toward methanol oxidation.

Highly conductive cocatalysts with great promotion effects are critical for the development of pristine graphene supported Pt-based catalysts for the methanol oxidation reaction (MOR) in direct methanol fuel cells (DMFCs). However, identification of these cocatalysts and controlled fabrication of Pt/cocatalyst/graphene hybrids with superior catalytic performance present great challenges. For the first time, pristine graphene supported N-rich carbon (NC) has been controllably fabricated via ionic-liquid-based in situ self-assembly for in situ growth of small and uniformly dispersed Pt NP chains to improve the MOR catalytic activity. It is discovered that the NC serves simultaneously as a linker to facilitate in situ nucleation of Pt, a stabilizer to restrict its growth and aggregation, and a structure-directing agent to induce the formation of Pt NP chains. The obtained nanohybrid shows a much higher forward peak current density than commercial Pt/C and most reported noncovalently functionalized carbon (NFC) supported Pt catalysts, a lower onset potential than almost all commercial Pt/C and NFC supported Pt, and greatly enhanced durability compared to graphene supported Pt NPs and commercial Pt/C. The superior catalytic performance is ascribed to the uniformly dispersed, small-diameter, and short Pt NP chains supported on highly conductive G@NC providing high ECSA and improved CO tolerance and the NC with high content of graphitic N greatly enhancing the intrinsic activity and CO tolerance of Pt and offering numerous binding sites for robustly attaching Pt. This work not only identifies and controllably fabricates a novel cocatalyst to significantly promote the catalytic activity of pristine graphene supported Pt but provides a facile and economical strategy for the controlled synthesis of high-performance integrated catalysts for the MOR in DMFCs.

Enhanced ionic conductivity and lithium dendrite suppression of polymer solid electrolytes by alumina nanorods and interfacial graphite modification.

Poor room-temperature ionic conductivity and lithium dendrite formation are the main issues of solid electrolytes. In this work, rod-shaped alumina incorporation and graphite coating were simultaneously applied to poly (propylene carbonate) (PPC)-based polymer solid electrolytes (Wang et al., 2018). The obtained alumina modified solid electrolyte membrane (Al-SE) achieves a high ionic conductivity of 3.48 × 10-4 S/cm at room temperature with a wide electrochemical window of 4.6 V. The assembled NCM622/Al-SE/Li solid-state battery exhibits initial discharge capacities of 198.2 mAh/g and 177.5 mAh/g at the current density of 0.1 C and 0.5 C, with the remaining capacities of 165.8 mAh/g and 161.3 mAh/g after 100 cycles respectively. The rod-shaped structure of Al2O3 provides fast transport channels for lithium ions and its Lewis acidity promotes the dissociation of lithium salts and release of free lithium ions. The lithiophilic Al2O3 and Graphite form intimate contact with metallic Li and create fast Li+ conductive layers of Li-Al-O layer and LiC6 layer, thus facilitating the uniform deposition of Li and inhibiting Li dendrite formation during long-term cycling. This kind of composite Al-SE is expected to provide a promising alternative for practical application in solid electrolytes.

Improved Interface Stability and Room-Temperature Performance of Solid-State Lithium Batteries by Integrating Cathode/Electrolyte and Graphite Coating.

Poor interface stability is a crucial problem hindering the electrochemical performance of solid-state lithium batteries. In this work, a novel approach for interface stability was proposed to integrate the cathode/solid electrolyte by forming an electrolyte buffer layer on the rough surface of the cathode and coating a layer of graphite on the side of the electrolyte facing the lithium anode. This hybrid structure significantly improves the integration and the interface stability of the electrode/electrolyte. The interfacial resistance was dramatically reduced, the stability of the plating/stripping of Li metal was enhanced, and the growth of lithium dendrites was also inhibited due to the formation of the LiC6 transition layer. The obtained solid-state lithium battery shows enhanced rate performance at room temperature from 0.5 to 4 C and stable cycling performance at 1 C with a retention capacity of 100 mAh g-1 after 200 cycles. This integrated electrode/electrolyte design approach is expected to be widely used to improve interfacial stability and room-temperature electrochemical performance of solid-state batteries.

An Overlapped Nano-Fe2O3/TiO2 Composite Coating on Activated Carbon Fiber Membrane with Enhanced Photocatalytic Performance.

Treatment of high concentration organic wastewater has always been a difficult problem in the field of water purification due to its high cost, low efficiency, long processing cycle and possible second pollution. An overlapped nano-Fe2O3/TiO2@activated carbon fiber membrane composite was successfully prepared by hydrothermal loading method. Nano-rod-like TiO2 and columnar Fe2O3 polyhedrals overlapped and formed a composite coating on the surface of activated carbon fiber membrane. This composite can absorb visible light and successfully remove the high concentration Congo red pollutant (400 mg/L) in 24 h. The enhanced photocatalytic performance should be attributed to the synergistic reaction of nano-Fe2O3 and nano-TiO2, which improves the separation of photo-generated electrons and holes thus enhances the photocatalytic efficiency. This multifunctional fiber membrane is expected to be widely applied in various organic wastewater treatments.

A novel all-fiber-based LiFePO4/Li4Ti5O12 battery with self-standing nanofiber membrane electrodes.

Electrodes with high conductivity and flexibility are crucial to the development of flexible lithium-ion batteries. In this study, three-dimensional (3D) LiFePO4 and Li4Ti5O12 fiber membrane materials were prepared through electrospinning and directly used as self-standing electrodes for lithium-ion batteries. The structure and morphology of the fibers, and the electrochemical performance of the electrodes and the full battery were characterized. The results show that the LiFePO4 and Li4Ti5O12 fiber membrane electrodes exhibit good rate and cycle performance. In particular, the all-fiber-based gel-state battery composed of LiFePO4 and Li4Ti5O12 fiber membrane electrodes can be charged/discharged for 800 cycles at 1C with a retention capacity of more than 100 mAh·g-1 and a coulombic efficiency close to 100%. The good electrochemical performance is attributed to the high electronic and ionic conductivity provided by the 3D network structure of the self-standing electrodes. This design and preparation method for all-fiber-based lithium-ion batteries provides a novel strategy for the development of high-performance flexible batteries.