石墨烯
石墨
材料科学
锂(药物)
离子
曲折
阴极
化学工程
化学气相沉积
阳极
复合材料
纳米技术
电极
化学
有机化学
多孔性
医学
工程类
内分泌学
物理化学
作者
Yongbiao Mu,Meisheng Han,Jiayang Li,Jingbing Liang,Jie Yu
出处
期刊:Carbon
[Elsevier]
日期:2021-03-01
卷期号:173: 477-484
被引量:66
标识
DOI:10.1016/j.carbon.2020.11.027
摘要
A goal of extreme fast charging less than 15 min recharge time while maintaining high energy density has been pursued to meet fast-charging and high-energy-density demand on lithium ion batteries used in electric vehicles, which is still a challenge. Here, in order to realize the goal vertical graphene sheets are grown on surface of graphite by thermal chemical vapor deposition. The vertical graphene sheets not only can greatly boost lithium-ion transport rate due to its intrinsically high electrical conductivity but also can significantly reduce tortuosity of lithium ion transport due to its highly preferential lithium-ion insertion paths. In half cells, the vertical graphene sheets/graphite can endure 3000 cycles in 3 min of charge time per cycle. More remarkably, a full cell with vertical graphene sheets/graphite anode and LiFePO4 cathode exhibits an ultrahigh energy density of 312.1 Wh kg−1 in 10 min of charge time per cycle at 4 C, indicating that the vertical graphene sheets/graphite anode possesses ability of extreme fast charging while maintaining high energy density.
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