Rapid Lithium Diffusion in Order@Disorder Pathways for Fast‐Charging Graphite Anodes

SMALL STRUCTURES - Tập 1 Số 1 - 2020
Wenlong Cai1, Chong Yan2,1, Yuxing Yao1, Lei Xu2, Rui Xu2, Lili Jiang1,3, Jia‐Qi Huang2, Qiang Zhang1
1Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
2Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
3Key Laboratory for Special Functional Materials in Jilin Provincial Universities, Jilin Institute of Chemical Technology, Jilin 132022, China

Tóm tắt

The use of graphite anode renders practical lithium‐ion batteries for effective energy storage. However, graphite anode is the bottleneck to achieve the fast charging of a battery, ascribed to its low operating potential and corresponding incidental lithium plating. Herein the principle of a thin nanoscale layer on the graphite surface to improve charging capability is investigated by applying a three‐electrode device to precisely record the working behavior. The Li+ diffusion rate is significantly improved by coating a nanoscale turbostratic carbon layer, in which abundant active sites and additional fast Li+ diffusion pathways at the basal‐plane side of graphite sheets render small polarization in a working battery. This fresh understanding enriches the fundamental insights into enhancing the rate performance and facilitating the practical applications of graphite in fast‐charging batteries.

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SMALL STRUCTURES

Tập 1 Số 1

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