Evolution and function of residual solvent in polymer-Li2B12H12 composite solid electrolyte

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外文摘要：Composite solid electrolytes(CSEs)containing polymer matrices and inorganic fillers hold promise for the next generation of solid-state batteries.However,the role of residual solvents in CSEs remains controversial.This study investigated the evolution and function of the resid-ual solvent in a polymer-Li2B12H12 CSE.A partial reaction occurred between Li2B12H12 and solvent N,N-dimethyl-formamide(DMF),which produced dimethy-laminomethanol(DMAM)in the CSE.Density functional theory calculations have revealed that DMAM forms stronger hydrogen bonds with polyvinylidene fluoride chains than DMF,which can have a plasticizing effect on the polymer matrix,leading to lower crystallinity and quicker segment motion.Therefore,this CSE exhibited improved Li-ion conducting properties,enabling the stable cycling of Li‖LiFePO4 solid-state batteries.This study provided insights into the role of residual solvents in CSEs.

外文关键词：

Composite solid electrolyteResidual solventLithium borohydridePlasticizing effect

作者：

Xiang-Yang Ye、Ke-Pan Bao、Sai-Nan Luo、Xin Li、Tai-Qiang Chen、Shui-Xin Xia、Tao Yuan、Yue-Peng Pang、Shi-You Zheng

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作者单位：

School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,China

Department of Materials Science and Engineering,National University of Singapore,Singapore 119077,Singapore

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaShanghai Municipal Science and Technology CommissionMajor Program for the Scientific Research Innovation Plan of Shanghai Education CommissionShanghai Outstanding Academic Leaders Plan,Guangxi Key Laboratory of Information Materials(Guilin University of Electronic TechnShanghai Rising-Star ProgramGeneral Program of Natural Science Foundation of Shanghai

项目编号：

51971146519711475217121852271222210105031002019-01-07-00-07-E00015201017-K20QA140710020ZR1438400

出版年：

2024

DOI：

10.1007/s12598-024-02710-z

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDEI

影响因子：0.801

ISSN：1001-0521

年,卷(期)：2024.43(8)