期刊
ELECTROCHIMICA ACTA
卷 56, 期 21, 页码 7249-7255出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.06.058
关键词
Dimeric ionic liquid; Gel polymer electrolyte; Ionic conductivity; Interfacial resistance; Lithium dendrite
资金
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [20100004050]
- Energy Efficiency & Resources of the Korea Institute of Energy Technology Evaluation and Planning [2010T100200295]
- Korea government Ministry of Knowledge Economy
A novel dimeric ionic liquid based on imidazolium cation and bis(trifluoromethanesulfonyl) imide (TFSI) anion has been synthesized through a metathesis reaction. its chemical shift values and thermal properties are identified via I H nuclear magnetic resonance (NMR) imaging and differential scanning calorimetry (DSC). The effect of the synthesized dimeric ionic liquid on the interfacial resistance of gel polymer electrolytes is described. Differences in the SEM images of lithium electrodes after lithium deposition with and without the 1,1'-pentyl-bis(2,3-dimethylimidazolium) bis(trifluoromethane-sulfonyl)imide (PDMITFSI) ionic liquid in gel polymer electrolytes are clearly discernible. This occurs because the PDMITFSI ionic liquid with hydrophobic moieties and polar groups modulates lithium deposit pathways onto the lithium metal anode. Moreover, high anodic stability for a gel polymer electrolyte with the PDMITFSI ionic liquid was clearly observed. (C) 2011 Elsevier Ltd. All rights reserved.
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