Crosslinked solubilizer enables nitrate-enriched carbonate polymer electrolytes for stable,high-voltage lithium metal batteries

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外文摘要：High-voltage lithium metal batteries(LMBs)have been considered promising next-generation high-energy-density batteries.However,commercial carbonate electrolytes can scarcely be employed in LMBs owing to their poor compatibility with metallic lithium.N,N-dimethylacrylamide(DMAA)-a crosslinkable solubilizer with a high Gutmann donor number-is employed to facilitate the dissolution of insoluble lithium nitrate(LiNO3)in carbonate-based electrolytes and to form gel polymer electrolytes(GPEs)through in situ polymerization.The Li+solvation structure of the GPEs is regulated using LiNO3 and DMAA,which suppresses the decomposition of LiPF6 and facilitates the formation of an inorganic-rich solid electrolyte interface.Consequently,the Coulombic efficiency(CE)of the Li‖Cu cell assembled with a GPE increases to 98.5％at room temperature,and the high-voltage Li‖NCM622 cell achieves a capacity retention of 80.1％with a high CE of 99.5％after 400 cycles.The bifunctional polymer electrolytes are anticipated to pave the way for next-generation high-voltage LMBs.

外文关键词：

Crosslinked solubilizerLithium nitrateCarbonate electrolytesGel polymer electrolytesLithium metal batteries

作者：

Chuyang Jing、Kuan Dai、Dong Liu、Wenran Wang、Libao Chen、Chunxiao Zhang、Weifeng Wei

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作者单位：

State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China

College of Materials and Chemical Engineering,Hunan Institute of Engineering,Xiangtan 411104,China

基金：

National Natural Science Foundation of ChinaChina Postdoctoral Science FoundationNatural Science Foundation of Hunan ProvinceState Key Laboratory of Powder Metallurgy at Central South University

项目编号：

519712502023M7339332023JJ40759

出版年：

2024

DOI：

10.1016/j.scib.2023.11.039

科学通报(英文版)

中国科学院

科学通报(英文版)

CSTPCD

ISSN：1001-6538

年,卷(期)：2024.69(2)

参考文献量54