首页|A flexible PEO-based polymer electrolyte with cross-linked network for high-voltage all solid-state lithium-ion battery

A flexible PEO-based polymer electrolyte with cross-linked network for high-voltage all solid-state lithium-ion battery

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Solid state lithium-ion batteries(SLIBs)have been considered as one of the most promising sustainable next-generation technologies for energy storage.However,the poor interfacial compatibility and low ion conductivity of solid electrolytes still remain a major challenge for SLIBs.Herein,a free-standing flexible solid polymer LA-PAM-PEO electrolyte is constructed through the electrospinning technology featuring with high Li+conductivity(6.1 x 10-4 S cm-1),strong mechanical strength and high Li+migration num-ber(0.32),which breaks the restriction between ionic conductivity and mechanical strength in polymer solid electrolyte.The cross-linking between LA,PAM and PEO is verified to decrease the crystalline of PEO,thus increasing the Li+conductivity.Moreover,benefiting from the 3D network composed of in-terconnected nanofibers and the covalent bonds between LA,PAM and PEO,the mechanical strength of LA-PAM-PEO SPE was also effectively improved.The LA-PAM-PEO SPE also delivers a high electrochemi-cal window(4.95 V),and low interface resistance(243.8 Ω).As a result,the Li/Li symmetrical cell with the LA-PAM-PEO displayed outstanding stability after 1000 h with the uniform Li deposition on the in-terface of Li electrode,in sharp contrast to the PEO SPE.In addition,the Li/LA-PAM-PEO SPE/LFP displays a discharge capacity of 135 mA h g-1 after 1000 cycles at the rate of 1 C,with a capacity retention of 93.5％.The proposed LA-PAM-PEO SPE thus opens new possibilities for the fabrication and engineering of solid-state Li-ion batteries.

Solid state batterySolid electrolytePEOElectrospinningLi-ion battery

Nian Wang、Yuting Wei、Shuang Yu、Wenchao Zhang、Xiaoyu Huang、Binbin Fan、Hua Yuan、Yeqiang Tan

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State Key Laboratory of Bio-Fibers and Eco-Textiles & Institute of Marine Biobased Materials & Collage of Materials Science and Engineering,Qingdao University,Qingdao 266071,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaShandong Provincial Natural Science FoundationShandong Provincial Natural Science FoundationState Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsShandong Provincial College Students'Innovation and Entrepreneurship Training Program

52072193U22A20131ZR2021JQ16ZR2023YQ040KF2217S202211065062

2024

10.1016/j.jmst.2023.10.005

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.183(16)
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