气候变化领域集成服务门户(CCPortal): Abnormal self-discharge in lithium-ion batteries

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DOI	10.1039/c8ee00186c
	Abnormal self-discharge in lithium-ion batteries
	Seong W.M.; Park K.-Y.; Lee M.H.; Moon S.; Oh K.; Park H.; Lee S.; Kang K.
发表日期	2018
ISSN	17545692
起始页码	970
结束页码	978
卷号	11 期号:4
英文摘要	Lithium-ion batteries are expected to serve as a key technology for large-scale energy storage systems (ESSs), which will help satisfy recent increasing demands for renewable energy utilization. Besides their promising electrochemical performance, the low self-discharge rate (<5% of the stored capacity over 1 month) of lithium-ion batteries is one of their most significant advantages for ESSs. Herein, contrary to conventional belief, we report that the self-discharge of LIBs can be abnormally accelerated when the battery has been exposed even to a routine short-term thermal exposure. We demonstrate that this thermal 'history' in addition to the temperature itself is memorized in the battery and accelerates the self-discharge rate. The series of characterizations performed in our work reveal that the electrolyte salt acts as a strong oxidizing agent by vigorously damaging the surface of the cathode, producing an internal 'parasitic' lithium source that continuously supplies lithium for the self-discharge. Although it is widely known that battery operation at elevated temperature generally induces faster degradation of capacity over multiple cycles, the key finding here is that not only the operation temperature but also the 'thermal history' of the battery should be carefully considered because this history remains and continues to affect the self-discharge rate afterwards. The self-discharge of LIBs has remained largely neglected; however, our findings suggest that close attention must be paid to the self-discharge of LIBs applied to large-scale ESSs, which, unlike mobile electronic devices, will be exposed to various outdoor temperature conditions. © 2018 The Royal Society of Chemistry.
英文关键词	Electrolytes; Energy utilization; Ions; Battery operation; Electrochemical performance; Electrolyte salts; Elevated temperature; Energy Storage Systems (ESSs); Mobile electronics; Operation temperature; Outdoor temperature; Lithium-ion batteries; alternative energy; electric field; electrode; electrolyte; energy storage; ion; lithium; temperature
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190283
作者单位	Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul, 08826, South Korea; Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, South Korea
推荐引用方式 GB/T 7714	Seong W.M.,Park K.-Y.,Lee M.H.,et al. Abnormal self-discharge in lithium-ion batteries[J],2018,11(4).
APA	Seong W.M..,Park K.-Y..,Lee M.H..,Moon S..,Oh K..,...&Kang K..(2018).Abnormal self-discharge in lithium-ion batteries.Energy & Environmental Science,11(4).
MLA	Seong W.M.,et al."Abnormal self-discharge in lithium-ion batteries".Energy & Environmental Science 11.4(2018).