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Uniform Nucleation of Lithium in 3D Current Collectors via Bromide Intermediates for Stable Cycling Lithium Metal Batteries

Authors :
Li-Jun Wan
Jing Zhang
Hui Duan
Yu-Guo Guo
Xing Zhang
Ji-Lei Shi
Qiang Zhang
Ya-Xia Yin
Jin-Yi Li
Lin-Bo Huang
Xudong Zhang
Xiang Chen
Lang Jiang
Source :
Journal of the American Chemical Society. 140(51)
Publication Year :
2018

Abstract

The conductive framework is generating considerable interest for lithium metal anodes to accommodate Li+ deposition, due to its ability to reduce electrode current density by increasing the deposition area. However, in most cases, the electroactive surface area is not fully utilized for the nucleation of Li in 3D current collectors, especially under high current densities. Herein, uniform nucleation of Li in the conductive skeleton is achieved by a two-step synergetic process arising from CuBr- and Br-doped graphene-like film. The modified electrode regulates Li nucleating in uniform pancake-like seeds and growing into a granular Li metal ascribed to the excellent lithiophilicity of CuBr- and Br-doping sites and the low Li diffusion barrier on the surface of generated LiBr, as confirmed by the experimental and computational results. Therefore, the modified anode endows small nucleation overpotential, a high-reversibility Li plating/stripping process, and excellent performance in full batteries with indust...

Details

ISSN :
15205126
Volume :
140
Issue :
51
Database :
OpenAIRE
Journal :
Journal of the American Chemical Society
Accession number :
edsair.doi.dedup.....fad1068426375a19ba42ad61355fe927