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Improving Cycling Performance of LiMn2O4 Battery by Adding an Ester-Functionalized Ionic Liquid to Electrolyte
Dong, Tao; Zhang, Suojiang; Zhang, Liang; Chen, Shimou; Lu, Xingmei
2015
Source PublicationAUSTRALIAN JOURNAL OF CHEMISTRY
ISSN0004-9425
Volume68Issue:12Pages:1911-1917
Abstract

Addressing capacity fading during electrochemical cycling is one of the most challenging issues of lithium-ion batteries based on LiMn2O4. Accordingly, in this work, an ester-functionalized ionic liquid, N-methylpyrrolidinium-N-acetate bis (trifluoromethylsulfonyl) imide ([MMEPyr][TFSI]), was designed as an additive to the electrolyte employed for Li/LiMn2O4 batteries to improve their electrochemical performance. A systematic comparative study was carried out using the LiTFSI-based electrolyte with and without [MMEPyr][TFSI] additive. After 100 cycles, the Li/LiMn2O4 half-cells retained 94% of their initial discharge capacity in the electrolyte containing 10 wt-% [MMEPyr][TFSI]. However, the cycling capacity of the half-cells in the electrolyte without [MMEPyr][TFSI] decreased considerably to, similar to 21 mAhg(-1) within the first 10 cycles. One of the main reasons for the decrease is the stabilization of the Al current collector by the [MMEPyr][TFSI] additive, as demonstrated by scanning electron microscopy, cyclic voltammetry, and Fourier transform infrared spectroscopy. Moreover, the Li/LiMn2O4 cells in the electrolyte containing [MMEPyr][TFSI] displayed high-rate performance, whereby similar to 90% of the cell initial discharge capacity was retained at 2.5C.

SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1071/CH15154
Indexed BySCI
Language英语
WOS KeywordRECHARGEABLE LITHIUM BATTERIES ; CATHODE MATERIALS ; CURRENT COLLECTOR ; CORROSION ; INHIBITION ; CHALLENGES ; ADDITIVES ; MECHANISM ; ALUMINUM ; BEHAVIOR
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
Funding Organization973 program(2015CB251401) ; National Natural Science Foundation of China(51304183 ; Special Funds of the National Natural Science Foundation of China(21127011) ; International Cooperation and Exchange of the National Natural Science Foundation of China(21210006) ; National Major Instrumentation Development Grant(2011YQ12003907) ; 51404230)
WOS IDWOS:000366648400020
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/20179
Collection多相复杂系统国家重点实验室
AffiliationChinese Acad Sci, Beijing Key Lab Ion Liquids Clean Proc, State Key Lab Multiphase Complex Syst, Key Lab Green Proc & Engn,Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Dong, Tao,Zhang, Suojiang,Zhang, Liang,et al. Improving Cycling Performance of LiMn2O4 Battery by Adding an Ester-Functionalized Ionic Liquid to Electrolyte[J]. AUSTRALIAN JOURNAL OF CHEMISTRY,2015,68(12):1911-1917.
APA Dong, Tao,Zhang, Suojiang,Zhang, Liang,Chen, Shimou,&Lu, Xingmei.(2015).Improving Cycling Performance of LiMn2O4 Battery by Adding an Ester-Functionalized Ionic Liquid to Electrolyte.AUSTRALIAN JOURNAL OF CHEMISTRY,68(12),1911-1917.
MLA Dong, Tao,et al."Improving Cycling Performance of LiMn2O4 Battery by Adding an Ester-Functionalized Ionic Liquid to Electrolyte".AUSTRALIAN JOURNAL OF CHEMISTRY 68.12(2015):1911-1917.
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