Revealing the effect of double bond-modified Li6.75La3Zr1.75Ta0.25O12 on the Li-ion conduction of composite solid electrolytes

被引：4
作者：
Song, Jiechen [1 ,3 ,4 ]
Xu, Yuxing [1 ,4 ]
Zhou, Yuncheng [1 ,3 ,4 ]
He, Rui [5 ]
Wei, Aijia [5 ]
Tan, Qiangqiang [1 ,2 ,3 ,4 ]
机构：
[1] Chinese Acad Sci, Inst Proc Engn, State Key Lab Mesosci & Engn, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
[3] Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
[4] Langfang Technol Serv Ctr Green Ind, Hebei Engn Res Ctr Power & Energy Storage Battery, Hebei Technol Innovat Ctr Adv Energy Mat, Hebei Mfg Ind Innovat Ctr New Energy Mat & Key Equ, Langfang 065001, Peoples R China
[5] Hebei Acad Sci, Inst Energy Resources, Shijiazhuang 050081, Hebei, Peoples R China
来源：
MATERIALS TODAY ENERGY | 2024年 / 43卷
基金：
北京市自然科学基金;
关键词：
Double bond groups; Lithium-ion transport mechanism; Poly(ethylene glycol) acrylates; Fast ionic conductors; Ionic conductivity; STATE; DISPERSION; MEMBRANE;
D O I：
10.1016/j.mtener.2024.101583
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Lithium metal batteries with polyethylene oxide (PEO) electrolytes have shown great potential to be one of the next -generation energy candidates. As the branch family of PEO electrolytes, poly(ethylene glycol) acrylates (PEGAs) attract more attention owing to their better electrochemical properties than that of PEO electrolytes. Introducing double bond -modified Li6.75La3Zr1.75Ta0.25O12 fillers (KH@LLZTO) has been a popular method to improve the electrochemical properties of PEGAs electrolytes due to the homogeneous dispersion of LLZTO. However, in this work, an inverse phenomenon is discovered. The electrochemical properties of PEGAs electrolytes get worse when introducing KH@LLZTO. By exploring the Li+ transport mechanism, the reason for the inverse phenomenon is revealed. More importantly, the design principle of PEGAs electrolytes with fast ionic conductor fillers is presented. Double bond -modified LLZTO can decrease the electrochemical properties of PEGAs electrolytes instead when there are lowmolecular weight monomers that can participate in the PEGAs polymer network and interact with Li+ , while the double bond -modified LLZTO can improve the electrochemical properties of PEGAs electrolytes when there are not aforementioned low -molecular weight monomers. This work provides a new understanding for componential design and optimization of PEGAs electrolytes with fast ionic conductors, hoping to promote the practical application of PEGAs electrolytes. (c) 2024 Elsevier Ltd. All rights reserved.
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页数：13
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