Almost-solid-state electrolyte with quadruple-hydrogen-bond-based semi-interpenetrating network for lithium metal batteries

IF 10.7 2区 材料科学 Q1 CHEMISTRY, PHYSICAL
Zhongxiu Li, Yong Wang, Yu Li, Wei Feng
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引用次数: 0

Abstract

Owing to their high stability and leakage resistance, solid-state electrolytes are well suited for use in lithium metal batteries (LMBs). However, the well-established poly(ethylene oxide)-based solid polymer electrolytes (SPEs) have a limited application scope because of their low room-temperature ionic conductivity and Li+ transport number. Herein, 2-ureido-4[1H]pyrimidinone-capped poly(ethylene glycol) was used as a solid plasticiser that interacted with the polymer matrix to expand the amorphous regions therein and formed quadruple hydrogen bonds as dynamic physical cross-links to afford a SPE with a semi-interpenetrating polymer network. The synergistic transference of Li+ by the solid plasticizer and polymer backbone resulted in a high Li+ transport number (0.63) and ionic conductivity (6.21 × 10−5 S cm−1 at 25 °C). The symmetric LMBs assembled using this SPE could be stably cycled for >1800 h, while the corresponding Li||LiFePO4 battery could be stably operated for >300 cycles at 0.2 C, exhibiting a high capacity retention of 78.1%. Thus, this study provides a new strategy for improving the performance of poly(ethylene oxide)-based solid-state electrolytes.
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来源期刊
Journal of Materials Chemistry A
Journal of Materials Chemistry A CHEMISTRY, PHYSICAL-ENERGY & FUELS
CiteScore
19.50
自引率
5.00%
发文量
1892
审稿时长
1.5 months
期刊介绍: The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.
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