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[This corrects the article DOI: 10.1039/D4RA00832D.].
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Due to their small interlayer spacing and a low lithiation potential close to Li+ deposition, current graphite anodes suffer from weak kinetics, and lithium deposition in a fast-charging process, hindering their practical application in high-power lithium-ion batteries (LIBs). In this work, expanded graphite incorporated with Li4Ti5O12 nanoparticles (EG/LTO) was synthesized via moderate oxidization of artificial graphite following a solution coating process. The EG/LTO has sufficient porosity for fast Li+ diffusion and a dense Li4Ti5O12 layer for decreased interface reaction resistance, resulting in excellent fast-charging properties. EG/LTO presented a high reversible capacity of 272.8 mA h g-1 at 3.74 A g-1 (10C), much higher than that of the original commercial graphite (50.1 mA h g-1 at 10C) and even superior to that of hard carbon. In addition, EG/LTO exhibited capacity retention rate of 98.4% after 500 cycles at 10C, demonstrating high structural stability during a long cycling process. This study provides a protocol for a solution chemistry method to prepare fast-charging graphite anode materials with high stability for high-power LIBs.
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ZnO nanorod, nanowire and nanotube arrays have been synthesized respectively on Zn substrates using a simple hydrothermal method. The morphology, size, length, density and uniformity of ZnO nanostructures can be well controlled by changing the different reaction conditions. The effects of substrates, temperature, positive and negative ions on the growth of nanostructure have been studied in detail. The results indicate that the addition of MgCl2 facilitates the growth of ZnO nanowires with higher density and formation of well-aligned nanowire arrays. The use of ammonia induces growth of longer nanowires but with lower density. PL spectrum show only strong UV emission at 385 nm, and no green band emission was observed, suggesting the excellent crystal quality of the nanowires.