A flexible solid polymer electrolyte enabled with lithiated zeolite for high performance lithium battery

作     者：Zhiyu Ding Qiming Tang Qi Zhang Penghui Yao Xingjun Liu Junwei Wu Zhiyu Ding;Qiming Tang;Qi Zhang;Penghui Yao;Xingjun Liu;Junwei Wu

作者机构：Shenzhen Key Laboratory of Advanced MaterialsDepartment of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China Maryland Energy Innovation InstituteUniversity of MarylandCollege ParkMD 20742USA Department of Chemical and Metallurgical EngineeringAalto UniversityKemistintie 1Aalto FI-00076Finland 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2023年第16卷第7期

页      面：9443-9452页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：This work was supported by the Stable Supporting Fund of Shenzhen(No.GXWD20201230155427003-20200728114835006). 

主　　题：solid-state lithium batteries composite polymer electrolytes zeolite poly(vinylidene fluorideco-hexafluoropropylene)(PVDF-HFP) flexible 

摘      要：Solid-state lithium batteries using composite polymer electrolytes(CPEs)have attracted much attention owing to their higher safety compared to liquid electrolytes and flexibility compared to ceramic electrolytes.However,their unsatisfactory lithium-ion conductivity still limits their development.Herein,a high ion conductive CPE with multiple continuous lithium pathways is designed.This new electrolyte consists of poly(vinylidene fluorideco-hexafluoropropylene)(PVDF-HFP)and lithiated X type zeolite(Li-X),which possesses a high ionic conductivity(1.98×10^(-4)S/cm),high lithium transference number(t_(Li^(+))=0.55),wide electrochemical window(4.7 V),and excellent stability against the lithium anode.Density functional theory(DFT)calculation confirms that the Lewis acid sites in zeolite can graft with N,N-dimethylformamide(DMF)and PVDF-HFP chains,resulting in decreased crystallinity of polymer and providing rapid Li+transmission channels.When used in a full cell,the solid Li|Li-X-3%|LiFePO_(4) cell displays excellent cycling stability and rate performance at room temperature and 60℃.Furthermore,pouch cells with the Li-X-3%electrolyte exhibit brilliant safety under extreme conditions,such as folding and cutting.Thus,this proposed zeolite-PVDF-HFP CPE represents a promising potential in the application of making a safer,higher performing,and flexible solid-state lithium battery.