材料科学
阳极
退火(玻璃)
化学工程
纳米结构
多孔性
六角相
六方晶系
锂(药物)
纳米技术
电化学
电极
相(物质)
结晶学
冶金
复合材料
物理化学
有机化学
化学
内分泌学
工程类
医学
作者
Siwen Lu,Fengyang Jing,Chang Zhu,Yi Kong,Jian Pei,Gang Chen
标识
DOI:10.1002/admi.202100837
摘要
Abstract Transition metal vanadates (TMVs) have long been seen as promising anodes for lithium‐ion batteries (LIBs). To improve the electrochemical performance of them, designing rational nanostructures and utilizing the synergetic effect of multiple components are usually regarded as two effective strategies. Herein, ultrathin porous hexagonal Zn 3 V 3 O 8 /ZnO@N‐C (ZnVO@N‐C) nanoplates are synthesized via a phase separation method which is achieved by changing annealing temperatures. Under the annealing temperature of 650 °C, the obtained ZnVO‐650 nanoplates exhibit the best electrochemical performance. When used as LIB anodes, ZnVO‐650 nanoplates show high reversible rate capacity (393.9 mA h g −1 at 5 A g −1 ), excellent cycling performance (855.1 mA h g −1 at 0.2 A g −1 after 120 cycles), and superior long‐term cycling stability (489.2 mA h g −1 at 3 A g −1 after 500 cycles). The outstanding electrochemical performance of ZnVO‐650 nanoplates can be explained by their special morphology, abundant phase boundaries, synergetic effect of the components, and the N‐doped carbon layers.
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