Interfacially Ordered NiCoMoS Nanosheets Arrays on Hierarchical Ti3C2Tx MXene for High-Energy-Density Fiber-Shaped Supercapacitors with Accelerated Pseudocapacitive Kinetics.
Angew Chem Int Ed Engl
; 63(36): e202409281, 2024 Sep 02.
Article
em En
| MEDLINE
| ID: mdl-38837579
ABSTRACT
Balancing electrochemical activity and structural reversibility of fibrous electrodes with accelerated Faradaic charge transfer kinetics and pseudocapacitive storage are highly crucial for fiber-shaped supercapacitors (FSCs). Herein, we report novel core-shell hierarchical fibers for high-performance FSCs, in which the ordered NiCoMoS nanosheets arrays are chemically anchored on Ti3C2Tx fibers. Beneficial from architecting stable polymetallic sulfide arrays and conductive networks, the NiCoMoS-Ti3C2Tx fiber maintains fast charge transfer, low diffusion and OH- adsorption barrier, and stabilized multi-electronic reaction kinetics of polymetallic sulfide. Consequently, the NiCoMoS-Ti3C2Tx fiber exhibits a large volumetric capacitance (2472.3â
F cm-3) and reversible cycling performance (20,000â
cycles). In addition, the solid-state symmetric FSCs deliver a high energy density of 50.6â
mWh cm-3 and bending stability, which can significantly power electronic devices and offer sensitive detection for dopamine.
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MEDLINE
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En
Ano de publicação:
2024
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Article