Functional polyethylene glycol-based solid electrolytes with enhanced interfacial compatibility for room-temperature lithium metal batteries dagger

doi:10.1039/d1qm00004g

	Functional polyethylene glycol-based solid electrolytes with enhanced interfacial compatibility for room-temperature lithium metal batteries dagger
	Zhang, Yuhang 1; Chen, Shimou 2,3; Chen, Yong 4; Li, Lingdong 1
刊名	MATERIALS CHEMISTRY FRONTIERS
	2021-03-15
页码	11
DOI	10.1039/d1qm00004g
英文摘要	The interface issues of electrodes/solid-state electrolytes have been limiting the application of room-temperature lithium metal batteries. In situ polymerization technology achieved the realization of solid-solid ultra-conformal interface contacts. However, few efforts have been directed toward the precursor compatibility of electrodes and simultaneous chemical/electrochemical performances, which may directly cause high interface impedance, severe lithium dendrites and unsatisfactory stability of assembled cells. In this work, high-performance polyethylene glycol-based solid electrolytes with enhanced interfacial compatibility was prepared by an in situ copolymerization of functional polyethylene glycol and vinylene carbonate, in which vinylene carbonate tends to preferentially produce poly(vinylene carbonate) via anionic polymerization within solid electrolyte interface layers on the lithium metal surface to stabilize Li metal, and copolymerization with polyethylene glycol improves overall electrochemical performances. The SPE-assembled Li-Li symmetrical batteries stably run for over 2000 h; meanwhile, SPEs exhibit a high room-temperature ionic conductivity (0.4 mS cm(-1)), high lithium ion transference number (0.46) and wide electrochemical stability window (5.1 V). Resultant LiFePO4/Li metal batteries show a considerable rate capability (up to 5C) and a super-long cycling performance (>300 cycles) at 1C at room temperature. In addition, assembled cells with high-loading cathodes (5.5-10.5 mg cm(-2)) deliver high initial capacities and good capacity retentions. The simple and scalable approach may enable the industrialization and application of room-temperature lithium metal batteries.
资助项目	National Natural Science Foundation of China[51922099] ; National Natural Science Foundation of China[21890760] ; Innovation Academy for Light-duty Gas Turbine, Chinese Academy of Sciences[CXYJJ20-MS-05] ; Natural Science Foundation of Hebei Province for Distinguished Young Scholars[E2020103052]
WOS研究方向	Chemistry ; Materials Science
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000634852800001
资助机构	National Natural Science Foundation of China ; Innovation Academy for Light-duty Gas Turbine, Chinese Academy of Sciences ; Natural Science Foundation of Hebei Province for Distinguished Young Scholars
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/47979]
专题	中国科学院过程工程研究所
通讯作者	Chen, Shimou; Li, Lingdong
作者单位	1.Dalian Univ Technol, Sch Chem Engn, Panjin 124221, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China 3.Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China 4.China Univ Min & Technol, Sch Chem & Environm Engn, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yuhang,Chen, Shimou,Chen, Yong,et al. Functional polyethylene glycol-based solid electrolytes with enhanced interfacial compatibility for room-temperature lithium metal batteries dagger[J]. MATERIALS CHEMISTRY FRONTIERS,2021:11.
APA	Zhang, Yuhang,Chen, Shimou,Chen, Yong,&Li, Lingdong.(2021).Functional polyethylene glycol-based solid electrolytes with enhanced interfacial compatibility for room-temperature lithium metal batteries dagger.MATERIALS CHEMISTRY FRONTIERS,11.
MLA	Zhang, Yuhang,et al."Functional polyethylene glycol-based solid electrolytes with enhanced interfacial compatibility for room-temperature lithium metal batteries dagger".MATERIALS CHEMISTRY FRONTIERS (2021):11.