Cyanogroup-Modified PEO-Based Electrolytes Achieve High Free Al3+ Concentration and Improve the Transport Dynamics in Solid-State Aluminum-Ion Batteries.

IF 10.7 2区 材料科学 Q1 CHEMISTRY, PHYSICAL
Hongquan Pan, Qiwen Sun, Wenming Zhang, Zhanyu Li
{"title":"Cyanogroup-Modified PEO-Based Electrolytes Achieve High Free Al<sup>3+</sup> Concentration and Improve the Transport Dynamics in Solid-State Aluminum-Ion Batteries.","authors":"Hongquan Pan, Qiwen Sun, Wenming Zhang, Zhanyu Li","doi":"10.1002/smtd.202401737","DOIUrl":null,"url":null,"abstract":"<p><p>Polymer-based solid electrolyte boasting ultra-high safety, energy density, mechanical strength and flexibility, attracting much attention in the field of battery applications. However, its widespread application is hindered by the low conductivity, insufficient aluminium salt dissociation, high crystallization degree, short service life, etc. To solve the above problems, a composite solid polymer electrolyte (SPE) design based on polyethylene oxide (PEO, Mw = 6 000 000) with AlCl<sub>3</sub>·6H<sub>2</sub>O as aluminum salt and butanedinitrile (SN) as plasticizer is proposed in this paper. The disorder and mobility of the PEO chains, conductivity, degree of aluminum salt dissociation, and service life are enhanced by the addition of plasticizer SN. Theoretical calculation demonstrates the formation of solvated sheath-like structure [SN…Al<sup>3+</sup>] has strong interactions with the polymer PEO, allowing rapid transport of Al<sup>3+</sup> through the polymer segments. These results are also further verified by subsequent tests, which can reveal the Al<sup>3+</sup> transport mechanism of room-temperature SPEs in a more reasonable way. Meanwhile, the relatively strong binding energy between PEO and SN can help to avoid the parasitic reaction between SN and Al, increase the service life of solid-state aluminium-ion batteries. Providing a promising solution for the design of solid-state battery electrolytes that can be applied at room temperature.</p>","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401737"},"PeriodicalIF":10.7000,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Small Methods","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/smtd.202401737","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

Polymer-based solid electrolyte boasting ultra-high safety, energy density, mechanical strength and flexibility, attracting much attention in the field of battery applications. However, its widespread application is hindered by the low conductivity, insufficient aluminium salt dissociation, high crystallization degree, short service life, etc. To solve the above problems, a composite solid polymer electrolyte (SPE) design based on polyethylene oxide (PEO, Mw = 6 000 000) with AlCl3·6H2O as aluminum salt and butanedinitrile (SN) as plasticizer is proposed in this paper. The disorder and mobility of the PEO chains, conductivity, degree of aluminum salt dissociation, and service life are enhanced by the addition of plasticizer SN. Theoretical calculation demonstrates the formation of solvated sheath-like structure [SN…Al3+] has strong interactions with the polymer PEO, allowing rapid transport of Al3+ through the polymer segments. These results are also further verified by subsequent tests, which can reveal the Al3+ transport mechanism of room-temperature SPEs in a more reasonable way. Meanwhile, the relatively strong binding energy between PEO and SN can help to avoid the parasitic reaction between SN and Al, increase the service life of solid-state aluminium-ion batteries. Providing a promising solution for the design of solid-state battery electrolytes that can be applied at room temperature.

氰基改性peo基电解质实现了高游离Al3+浓度并改善了固态铝离子电池的输运动力学。
聚合物基固体电解质具有超高的安全性、能量密度、机械强度和柔韧性,在电池领域的应用备受关注。但其电导率低、铝盐解离不足、结晶度高、使用寿命短等问题阻碍了其广泛应用。为解决上述问题,本文提出了一种以聚氧聚乙烯(PEO, Mw = 6 000 000)为基材,以AlCl3·6H2O为铝盐,丁腈(SN)为增塑剂的复合固体聚合物电解质(SPE)设计。增塑剂SN的加入提高了PEO链的无序性、迁移性、电导率、铝盐解离度和使用寿命。理论计算表明,溶剂化的鞘状结构[SN…Al3+]的形成与聚合物PEO有很强的相互作用,使得Al3+通过聚合物段的快速传输。这些结果也得到了后续试验的进一步验证,可以更合理地揭示室温SPEs的Al3+输运机制。同时,PEO与SN之间较强的结合能有助于避免SN与Al之间的寄生反应,提高固态铝离子电池的使用寿命。为设计可在室温下使用的固态电池电解质提供了一个有前途的解决方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Small Methods
Small Methods Materials Science-General Materials Science
CiteScore
17.40
自引率
1.60%
发文量
347
期刊介绍: Small Methods is a multidisciplinary journal that publishes groundbreaking research on methods relevant to nano- and microscale research. It welcomes contributions from the fields of materials science, biomedical science, chemistry, and physics, showcasing the latest advancements in experimental techniques. With a notable 2022 Impact Factor of 12.4 (Journal Citation Reports, Clarivate Analytics, 2023), Small Methods is recognized for its significant impact on the scientific community. The online ISSN for Small Methods is 2366-9608.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信