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Triethylbutylammonium bis(trifluoromethanesulphonyl)imide ionic liquid as an effective electrolyte additive for Li-ion batteries
Wang, Zhongni1,2; Cai, Yingjun1; Dong, Tao1; Chen, Shimou1; Lu, Xingmei1
2013-06-01
Source PublicationIONICS
Volume19Issue:6Pages:887-894
AbstractIonic liquids are promising additives for Li-ion batteries owing to its desirable physicochemical properties. Triethylbutylammonium bis(trifluoromethanesulphonyl)imide ([N-2224][Tf2N]) ionic liquid was synthesized and their physical and electrochemical properties were investigated. Among several quaternary ammonium ionic liquids, [N-2224][Tf2N] exhibited higher conductivity (1.31 mS cm(-1)), better thermal and electrochemical stabilities, and wide electrochemical window, i.e., more than 5.9 V. Standard solution was prepared by dissolving lithium bis(trifluoromethanesulphonyl)imide (LiTf2N) in ethylene carbonates/dimethyl carbonate (1:1, by weight). The conductivity for the electrolyte containing [N-2224][Tf2N] and the mixed electrolyte without additives at 25 A degrees C are 10.24 and 8.79 mS cm(-1), respectively. LiFePO4 half-cell containing 0.6 mol L-1 LiTf2N-based organic electrolyte with [N-2224][Tf2N] showed relatively high initial discharge capacity and coulombic efficiency at first cycle. It is found that the mix [N-2224][Tf2N] electrolyte exhibits relatively high-rate capacity. The capacity retention of half-cell containing [N-2224][Tf2N] is 2 % more than without additive at 0.2 C. However, the rate capacity retention of the half-cell with mix [N-2224][Tf2N] electrolyte is above 10 % more than without additive at 0.5 C. The results showed that [N-2224][Tf2N] was an effective electrolyte additive in LiFePO4 half-cell.
KeywordIonic Liquid Li-ion Battery Additive Rate Property
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
Language英语
WOS KeywordTEMPERATURE MOLTEN-SALTS ; ELECTROCHEMICAL PROPERTIES ; POTENTIAL ELECTROLYTES ; VINYLENE CARBONATE ; LITHIUM ; BEHAVIOR ; VISCOSITY
WOS Research AreaChemistry ; Electrochemistry ; Physics
WOS SubjectChemistry, Physical ; Electrochemistry ; Physics, Condensed Matter
WOS IDWOS:000319438500004
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13560
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Beijing Key Lab Ion Liquids Clean Proc, Key Lab Green Proc & Engn,State Key Lab Multiphas, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Coll Chem & Chem Engn, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Zhongni,Cai, Yingjun,Dong, Tao,et al. Triethylbutylammonium bis(trifluoromethanesulphonyl)imide ionic liquid as an effective electrolyte additive for Li-ion batteries[J]. IONICS,2013,19(6):887-894.
APA Wang, Zhongni,Cai, Yingjun,Dong, Tao,Chen, Shimou,&Lu, Xingmei.(2013).Triethylbutylammonium bis(trifluoromethanesulphonyl)imide ionic liquid as an effective electrolyte additive for Li-ion batteries.IONICS,19(6),887-894.
MLA Wang, Zhongni,et al."Triethylbutylammonium bis(trifluoromethanesulphonyl)imide ionic liquid as an effective electrolyte additive for Li-ion batteries".IONICS 19.6(2013):887-894.
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