The feasibility of a pyrrolidinium-based ionic liquid solvent for non-graphitic carbon electrodes

Junyoung Mun, Taeeun Yim, Sunhyung Jurng, Jang Hoon Park, Sang Young Lee, Ji Heon Ryu, Young Gyu Kim, Seung M. Oh

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The feasibility of a pyrrolidinium-based room-temperature ionic liquid (RTIL) as the solvent for lithium-ion batteries is tested by analyzing its intercalation behavior and thermal stability. The RTIL-cations are intercalated into a graphitic carbon and a part of them are irreversibly trapped inside the graphene layers. These trapped cations block Li+ intercalation to give only a marginal capacity. In contrast, such a cation insertion/trapping is absent in two non-graphitic carbons; hard carbon and soft carbon. A stable cycle performance with a Li+ insertion capacity of about 200 mAh g - 1 is attained. The absence of RTIL-cation insertion is evidenced by the cyclic voltammograms and Raman spectra. A calorimetric study reveals that this RTIL has a higher thermal stability and less reactivity with lithiated carbons as compared with the carbonate-based solvent. The use of this RTIL solvent for the non-graphitic carbons seems to be feasible.

Original languageEnglish
Pages (from-to)1256-1259
Number of pages4
JournalElectrochemistry Communications
Volume13
Issue number11
DOIs
Publication statusPublished - 2011 Nov

All Science Journal Classification (ASJC) codes

  • Electrochemistry

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