Semi-interpenetrating polymer network-based gel polymer electrolytes for Li-ion batteries applications

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry Pub Date : 2025-02-01 DOI:10.1016/j.jelechem.2024.118885

Lanyang Feng, Yao Xu, Juan Wu, Bencai Lin

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引用次数: 0

Abstract

In this study, a series of high-performance semi-interpenetrating polymer network (sIPN)-based gel polymer electrolytes (GPEs) were prepared using UV-initiated polymerization of unsaturated-bond-containing ethylene oxide oligomers (specifically poly(ethylene glycol) methyl ether methacrylate(PEGMAMA) and poly(ethylene glycol) diacrylate(PEGDA)), followed by blending with linear poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP). PEGDA was used as the crosslinking agent to form a crosslinked structure with PEGMAMA. This unique architecture not only provided abundant ethylene oxide chain segments but also disrupted the crystallinity of PVDF-HFP. The sIPNs structure imparts GPEs with high thermal stabilities and robust mechanical properties. Among the sIPN-based GPEs, PP₂P₃-IL exhibited a high conductivity of 1.05 × 10⁻³ S cm⁻¹. Owing to the excellent dissociation ability of the sIPNs structure toward Li salts, PP₂P₃-IL shows a high Li-ion transference number of 0.68. The Li|PP₂P₃-IL|Li battery maintained a low steady-state overpotential, even after 800 h. Moreover, the discharge capacity of the Li/LiFePO₄ battery reached 150 mAh g⁻¹, and its capacity retention higher than 95 % even after 100 cycles, demonstrating its strong potential for application in Li-ion battery.

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来源期刊

Journal of Electroanalytical Chemistry 化学-电化学

CiteScore

7.80

自引率

6.70%

发文量

912

审稿时长

2.4 months

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.