Cross-linking network based on Poly(ethylene oxide): Solid polymer electrolyte for room temperature lithium battery

JOURNAL OF POWER SOURCES

卷:420

Article

Zhang, Yuhang¹  Lu, Wei¹  Cong, Lina¹  Liu, Jia¹  Sun, Liqun¹  Mauger, Alain²  Julien, Christian M.²  Xie, Haiming¹  Liu, Jun¹ 

[1] Northeast Normal Univ, Dept Chem, Natl & Local United Engn Lab Power Battery, Changchun 130024, Jilin, Peoples R China

[2] Sorbonne Univ, CNRS, UMR 7590, IMPMC, 4 Pl Jussieu, F-75005 Paris, France

关键词: Solid polymer electrolyte;    In-situ dual-reaction;    All-solid-state lithium battery;    Interfacial resistance;   

DOI  :  10.1016/j.jpowsour.2019.02.090

来源: Elsevier

【 摘 要 】

In this paper, we develop a facile UV-derived in-situ dual-reaction to prepare a flexible poly(ethylene oxide) (PEO)-based solid polymer electrolyte (SPE), which is applied for ambient-temperature all-solid-state lithium battery. By modifying the amorphous domain of PEO through cross-linking with tetraglyme (TEGDME) and introducing a rigid linear oligomer of tetraethylene glycol dimethacrylate (TEGDMA) into the matrix, a SPE is obtained with high ionic conductivity (2.7 x 10(-4) S cm(-1) at 24 degrees C) and enhanced mechanical strength. The asprepared SPE shows superior electrochemical properties with decent lithium transference number of 0.56, wide electrochemical stability window above 5 V vs. Li (+)/Li and low interfacial resistance. By means of galvanostatic cycling studies in Li//Li symmetrical and LiFePO4//Li cells, we further demonstrate that the SPE exhibits excellent cycling performance with minimization of lithium dendrite formation.

【 授权许可】

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