{"title":"Almost-solid-state electrolyte with quadruple-hydrogen-bond-based semi-interpenetrating network for lithium metal batteries","authors":"Zhongxiu Li, Yong Wang, Yu Li, Wei Feng","doi":"10.1039/d4ta08975h","DOIUrl":null,"url":null,"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.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"32 1","pages":""},"PeriodicalIF":10.7000,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Chemistry A","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1039/d4ta08975h","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
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.
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.