Stable Cycling of All-Solid-State Lithium Batteries Enabled by Cyano-Molecular Diamond Improved Polymer Electrolytes  

作　　者：Yang Dai Mengbing Zhuang Yi-Xiao Deng Yuan Liao Jian Gu Tinglu Song Hao Yan Jin-Cheng Zheng 

机构地区：[1]Department of Chemical Engineering,Shanghai University,Shangda Road 99,Shanghai 200444,People's Republic of China [2]Department of Physics,Xiamen University,Xiamen 361005,People's Republic of China [3]Experimental Center of Advanced Materials School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,People's Republic of China [4]Department of Physics and Department of New Energy Science and Engineering,Xiamen University Malaysia,43900 Sepang,Malaysia

出　　处：《Nano-Micro Letters》2024年第10期561-575,共15页纳微快报（英文版）

基　　金：supported by National Natural Science Foundation of China(Grant No.22209012).

摘　　要：The interfacial instability of the poly(ethylene oxide)(PEO)-based electrolytes impedes the long-term cycling and further application of all-solid-state lithium metal batter-ies.In this work,we have shown an effective additive 1-adaman-tanecarbonitrile,which con-tributes to the excellent per-formance of the poly(ethylene oxide)-based electrolytes.Owing to the strong interaction of the 1-Adamantanecarboni-trile to the polymer matrix and anions,the coordination of the Li^(+)-EO is weakened,and the binding effect of anions is strengthened,thereby improving the Li^(+)conductivity and the electrochemical stability.The diamond building block on the surface of the lithium anode can sup-press the growth of lithium dendrites.Importantly,the 1-Adamantanecarbonitrile also regulates the formation of LiF in the solid electrolyte interface and cathode electrolyte interface,which contributes to the interfacial stability(especially at high voltages)and protects the electrodes,enabling all-solid-state batteries to cycle at high voltages for long periods of time.Therefore,the Li/Li symmetric cell undergoes long-term lithium plating/stripping for more than 2000 h.1-Adamantanecarbonitrile-poly(ethylene oxide)-based LFP/Li and 4.3 V Ni_(0.8)Mn_(0.1)Co_(0.1)O_(2)/Li all-solid-state batteries achieved stable cycles for 1000 times,with capacity retention rates reaching 85%and 80%,respectively.

关 键 词：1-Adamantanecarbonitrile(ADCN) Poly(ethylene oxide) All-solid-state batteries Interfacial stability High voltage 

分 类 号：O646[理学—物理化学] TM912[理学—化学]