The electrochemical performance of lithium vanadate/natural graphite composite material as anode for lithium ion batteries
The electrochemical performance of lithium vanadate/natural graphite composite material as anode for lithium ion batteries
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钒酸锂/天然石墨复合材料作为锂离子电池负极的电化学性能
DOI:
10.1016/j.electacta.2014.09.018
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发表时间:
2014-11
影响因子:
6.6
通讯作者:
Zhang Lulu
中科院分区:
文献类型:
--
作者:
Zhang Jicheng;Ma Jianjun;Yang Xuelin;Zhang Lulu
Li3VO4nanoparticles with mean size about 100 nm are uniformly deposited on the surface of natural graphite via a quasi sol gel method. The electrochemical performance of the Li3VO4/natural graphite composite as anode for lithium ion batteries is studied via galvanostatic battery testing, which shows excellent cycle stability and rate capability. At a specific current of 156 mA g−1, it delivers discharge and charge capacity of 579 and 427 mAh g−1in the initial cycle, which maintain of 469 and 468 mAh g−1after 100 cycles. After 60 cycles at various specific currents from 234 to 11,719 mA g−1, the discharge capacity can restore to 450 mAh g−1when reverting the discharge/charge current to 234 mA g−1. It is demonstrated that natural graphite has important effect on the electrochemcial performance of the composite electrode, and an appropriate amount of natural graphite is beneficial to reduce the charge transfer resistance and maintain stable charge transfer process in cycling.
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