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

By Yuhang Zhang, Wei Dang Lu, Lina Cong, Jia Liu, Liqun Sun, A. Mauger, C. Julien, Haiming Xie, Jun Liu. Journal of Power Sources, 2019

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Abstract 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 × 10−4 S cm−1 at 24 °C) and enhanced mechanical strength. The as-prepared 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.

Subfields: Automotive Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/f5a49d80ad4abbd3361082501b4d4d6e48fa8331