Xianli Song , Lipeng Yang , Yi Liu , Gongying Wang
{"title":"Construction organic composite gel polymer electrolyte for stable solid-state lithium metal batteries","authors":"Xianli Song , Lipeng Yang , Yi Liu , Gongying Wang","doi":"10.1016/j.ssi.2025.116821","DOIUrl":null,"url":null,"abstract":"<div><div>Gel polymer electrolytes (GPEs) synergizing the advantages of both solid and liquid electrolytes are promising electrolyte candidates for lithium metal batteries (LMBs). However, due to the presence of the liquid medium, mechanical performance and thermal stability are compromised. To address this issue, we designed and prepared an organic composite GPEs by immersing a PVDF-HFP fiber membrane in a polyIL-in-salt ionic solution. This process imparts exceptional high-temperature stability (decomposition temperature of 340 °C) and enhanced mechanical performance (Young's modulus of about 6.7 MPa) to the GPEs. The incorporation of polyIL-in-salt ionic solutions is found to enhance the ionic conductivity of GPEs to 0.69 mS cm<sup>−1</sup> at 25 °C, facilitating a homogeneous distribution and accelerating ionic migration. The Li||Li battery utilizing this electrolyte effectively alleviates the concentration polarization and achieves the stable cycle performance over 1200 h at 0.25 mA cm<sup>−2</sup> at 50 °C. Additionally, the lithium metal battery, which incorporates the organic composite gel polymer electrolytes, has exhibited an extraordinary specific capacity of 167.3 mAh g<sup>−1</sup>, accompanied by a retention rate of 99.1 % at 50 °C, even after 100 cycles. This study asserts that the innovative organic composite GPEs exhibit considerable potential for practical applications in lithium metal batteries (LMBs).</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"423 ","pages":"Article 116821"},"PeriodicalIF":3.0000,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solid State Ionics","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0167273825000402","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Gel polymer electrolytes (GPEs) synergizing the advantages of both solid and liquid electrolytes are promising electrolyte candidates for lithium metal batteries (LMBs). However, due to the presence of the liquid medium, mechanical performance and thermal stability are compromised. To address this issue, we designed and prepared an organic composite GPEs by immersing a PVDF-HFP fiber membrane in a polyIL-in-salt ionic solution. This process imparts exceptional high-temperature stability (decomposition temperature of 340 °C) and enhanced mechanical performance (Young's modulus of about 6.7 MPa) to the GPEs. The incorporation of polyIL-in-salt ionic solutions is found to enhance the ionic conductivity of GPEs to 0.69 mS cm−1 at 25 °C, facilitating a homogeneous distribution and accelerating ionic migration. The Li||Li battery utilizing this electrolyte effectively alleviates the concentration polarization and achieves the stable cycle performance over 1200 h at 0.25 mA cm−2 at 50 °C. Additionally, the lithium metal battery, which incorporates the organic composite gel polymer electrolytes, has exhibited an extraordinary specific capacity of 167.3 mAh g−1, accompanied by a retention rate of 99.1 % at 50 °C, even after 100 cycles. This study asserts that the innovative organic composite GPEs exhibit considerable potential for practical applications in lithium metal batteries (LMBs).
期刊介绍:
This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on:
(i) physics and chemistry of defects in solids;
(ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering;
(iii) ion transport measurements, mechanisms and theory;
(iv) solid state electrochemistry;
(v) ionically-electronically mixed conducting solids.
Related technological applications are also included, provided their characteristics are interpreted in terms of the basic solid state properties.
Review papers and relevant symposium proceedings are welcome.