Ionic liquid additive stabilized cathode/electrolyte interface in LiCoO2 based solid-state lithium metal batteries

doi:10.1016/j.electacta.2020.137593

	Ionic liquid additive stabilized cathode/electrolyte interface in LiCoO2 based solid-state lithium metal batteries
	Zhang, Qipeng 3,4; Pan, Kecheng 1,3; Jia, Mengmin 3,4; Zhang, Xiaoyan 3,5; Zhang, Lan 2,3,4; Zhang, Haitao 3; Zhang, Suojiang 3,4
刊名	ELECTROCHIMICA ACTA
	2021-02-01
卷号	368 页码:7
关键词	Solid state lithium metal battery Cathode/electrolyte interface High voltage Ionic liquid LiCoO2
ISSN号	0013-4686
DOI	10.1016/j.electacta.2020.137593
英文摘要	Poly(ethylene oxide) (PEO)-based solid state batteries is one of the most attractive candidates for nextgeneration high performance energy storage devices, especially when it matches the LiCoO2 cathode of high volumetric energy density. However, cathode/electrolyte interface reactions will be triggered at high voltage, leading to high interfacial resistance and fast capacity decay. In this work, a selected ionic liquid, 1-methyl-1-propylpiperidinium tetrafluoroborate (PP13BF4), is prepared and applied in LiCoO2 electrode operating at high work voltages of 3.0-4.3 V to regulate the interface. Electrochemical impedance spectroscopy and holding test indicate that facilitated by the PP13BF4, the cathode/electrolyte interfacial reaction is effectively suppressed and the resistance is reduced. When an optimal content, 2 wt%, PP13BF4 is added into the LiCoO2 electrode, the solid-state lithium metal cell delivers an initial discharge capacity of 125.1 mAh g(-1) under the current density of 0.05 C at 55 degrees C, which is almost twice that of bare electrode. Meantime, it retains 76.3% of its capacity in 100 cycles under 0.2 C rate. Further characterizations illustrate that PP13BF4 participates in the formation of a protective CEI, which effectively suppresses parasitic reactions between electrolyte and electrode. This work provides a facile and practical idea for the development of 4 V class solid state lithium metal batteries. (C) 2020 Elsevier Ltd. All rights reserved.
资助项目	National Key Research and Development Program of China[2019YFA0705600] ; National Natural Science Foundation of China[21706261] ; Science Fund for Creative Research Groups of the National Natural Science Foundation of China[21921005] ; Hebei Natural Science Foundation[B2020103028]
WOS关键词	HIGH-VOLTAGE ; ELECTROLYTE ; CORROSION ; PERFORMANCE ; ALUMINUM ; FILM
WOS研究方向	Electrochemistry
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000609074700006
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Science Fund for Creative Research Groups of the National Natural Science Foundation of China ; Hebei Natural Science Foundation
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/43257]
专题	中国科学院过程工程研究所
通讯作者	Zhang, Lan; Zhang, Suojiang
作者单位	1.Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China 2.Chinese Acad Sci, Langfang Inst Proc Engn, Langfang 065001, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing Key Lab Ion Liquids Clean Proc,State Key, Beijing 100190, Peoples R China 4.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China 5.Xi An Jiao Tong Univ, Sch Chem Engn & Technol, Xian 710049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Qipeng,Pan, Kecheng,Jia, Mengmin,et al. Ionic liquid additive stabilized cathode/electrolyte interface in LiCoO2 based solid-state lithium metal batteries[J]. ELECTROCHIMICA ACTA,2021,368:7.
APA	Zhang, Qipeng.,Pan, Kecheng.,Jia, Mengmin.,Zhang, Xiaoyan.,Zhang, Lan.,...&Zhang, Suojiang.(2021).Ionic liquid additive stabilized cathode/electrolyte interface in LiCoO2 based solid-state lithium metal batteries.ELECTROCHIMICA ACTA,368,7.
MLA	Zhang, Qipeng,et al."Ionic liquid additive stabilized cathode/electrolyte interface in LiCoO2 based solid-state lithium metal batteries".ELECTROCHIMICA ACTA 368(2021):7.