Diffusion-Free All-Solid-State Batteries Enabled by an Ionic/Electronic Dual-Conductive Anode  

作　　者：Yue Ji Zaifa Wang Changtai Zhao Zhiqiang Fang Yue Gong Qihang Jing Yu Xia Tengjiao Luan Yingying Jiang Jianwen Liang Xiaona Li Mengdi Zhao Ximin Zhai Xiaofei Bie Tao Jiang Dongsheng Geng Xueliang Sun 

机构地区：[1]School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083 [2]Solid State Batteries Research Center,GRINM(Guangdong)Institute for Advanced Materials and Technology,Foshan 528051 [3]China Automotive Battery Research Institute Co.Ltd.,Beijing 100088 [4]China FAW Corporation Limited,Changchun 130013 [5]Key Laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering,Jilin University,Changchun 130025 [6]Eastern Institute for Advanced Study,Eastern Institute of Technology,Ningbo 315200 [7]School of Chemistry and Materials Science,Nanjing University of Information Science&Technology,Nanjing 210044

出　　处：《Renewables》2024年第3期194-203,共10页可再生能源（英文）

基　　金：This research was made possible as a result of a generous grant from the National Natural Science Foundation of China(NSFC;grant nos.22308303 and 12304029);Beijing Nova Program,China(grant no.20230484376);China First Auto Works(FAW)Group Corp.,Ltd.

摘　　要：Silicon(Si)is one of the most promising anodes for enabling all-solid-state batteries(ASSBs)with high energy density and safety.However,the tremendous volume change and sluggish kinetics result in poor electrochemical performance.Herein,we proposed an ionic/electronic dual-conductive material of Li_(x)Si as a diffusion-rapid and all-active anode for ASSBs.Compared with pure Si anode,the as-fabricated Li_(x)Si showed dramatic promotions of 35 times electronic and 400 times ionic conductivities.The three-dimensional(3D)ionic-electronic transport system of Li_(x)Si enabled rapid kinetics and uniform volume change of electrode materials in the whole electrode,corresponding to a lower volumechange rate.As a result,the ASSBs with LiCoO_(2)cathode exhibited a reversible discharge capacity of 154.4 mAh g−1,corresponding to an initial Coulombic efficiency of 97.3%.Besides,the batteries delivered a high rate capacity of 99.3 mAh g^(−1)at 2 C and long-term cycle stability of 94.0%after 800 cycles at 1 C,which was much better than the pure Si anode.This study sheds light on a new understanding of the importance of ionic conductivity for Si-based anode and might help inspire the design of advanced anode materials for ASSBs.

关 键 词：all-solid-state batteries lithium silicon anodes interface stability ionic-electronic conductors long-term cycling performance 

分 类 号：TM912[电气工程—电力电子与电力传动]