{"title":"Recyclable cellulose-based vitrimer electrolytes for lithium ion batteries","authors":"","doi":"10.1016/j.est.2024.114175","DOIUrl":null,"url":null,"abstract":"<div><div>Cellulose as polymer electrolytes in lithium-ion batteries (LIBs) has a number of advantages such as low cost, readily available, abundant, environmentally friendly, and contains electron-donating groups within its structure. Beside, vitrimers are a novel class of polymer materials made of dynamic covalent networks that can undergo bond-exchange processes. Beyond cellulose's special qualities, cellulose-based vitrimer production is highly desired for enhancing electrolytes mechanical qualities, thermal stability, cyclability, and ionic conductivity. In this study, cellulose-based vitrimeric polymer electrolytes are prepared. At first, poly(glycidyl methacrylate-<em>co</em>-methyl acrylate) by different ratios of comonomers is prepared and then cellulose is cross-linked by prepared copolymers. Prepared vitrimers are recycled four steps through transesterification reaction and as-prepared and recycled crosslinked celluloses are used as gel polymer electrolytes (GPEs). The results showed the best ionic conductivity of as-prepared samples in order of 10<sup>−4</sup> S/cm whereas ionic conductivity increased to order of 10<sup>−3</sup> S/cm for recycled samples. Also, high lithium-ion transfer number of >0.8 was achieved for recycled samples. All as-prepared and recycled electrolytes had excellent electrochemical stability window (> 5 V). Also, improved specific capacity (>178 mA h g<sup>−1</sup> with capacity retention upper than 90 % after 200 cycles at 0.2C of LiCoO<sub>2</sub>/GPEs/Gr) was attained.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":null,"pages":null},"PeriodicalIF":8.9000,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of energy storage","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352152X24037617","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
Cellulose as polymer electrolytes in lithium-ion batteries (LIBs) has a number of advantages such as low cost, readily available, abundant, environmentally friendly, and contains electron-donating groups within its structure. Beside, vitrimers are a novel class of polymer materials made of dynamic covalent networks that can undergo bond-exchange processes. Beyond cellulose's special qualities, cellulose-based vitrimer production is highly desired for enhancing electrolytes mechanical qualities, thermal stability, cyclability, and ionic conductivity. In this study, cellulose-based vitrimeric polymer electrolytes are prepared. At first, poly(glycidyl methacrylate-co-methyl acrylate) by different ratios of comonomers is prepared and then cellulose is cross-linked by prepared copolymers. Prepared vitrimers are recycled four steps through transesterification reaction and as-prepared and recycled crosslinked celluloses are used as gel polymer electrolytes (GPEs). The results showed the best ionic conductivity of as-prepared samples in order of 10−4 S/cm whereas ionic conductivity increased to order of 10−3 S/cm for recycled samples. Also, high lithium-ion transfer number of >0.8 was achieved for recycled samples. All as-prepared and recycled electrolytes had excellent electrochemical stability window (> 5 V). Also, improved specific capacity (>178 mA h g−1 with capacity retention upper than 90 % after 200 cycles at 0.2C of LiCoO2/GPEs/Gr) was attained.
期刊介绍:
Journal of energy storage focusses on all aspects of energy storage, in particular systems integration, electric grid integration, modelling and analysis, novel energy storage technologies, sizing and management strategies, business models for operation of storage systems and energy storage developments worldwide.