Electrochemical characteristics of 0.3Li2MnO3–0.7LiMn1.5Ni0.5O4 composite cathode in pyrrolidinium-based ionic liquid electrolytes

P. P. Dahiya, Jagabandhu Patra, Jeng Kuei Chang, Kirtan Sahoo, S. B. Majumder, S. Basu

Research output: Contribution to journalArticle

Abstract

In this work, we have compared the electrochemical characteristics of auto combustion synthesized 0.3Li2MnO3–0.7LiMn1.5Ni0.5O4 composite cathode using conventional organic electrolyte and Li+/PMP-TFSI (N-propyl-N-methyl pyrrolidinium-bis(trifluoromethanesulfonyl) imide) ionic liquid (IL) at 25 °C and 60 °C. At 60 °C, IL electrolyte yields superior specific discharge capacity, cycleability, rate performance and voltage fading characteristics of the composite cathode. We have argued that the superiority of IL electrolyte is related to its relatively higher decomposition temperature. The effect of ILs on the cycle induced layered to nickel free spinel phase transformation in the composite cathode is also investigated by post cycling XRD.

Original languageEnglish
Pages (from-to)195-201
Number of pages7
JournalJournal of the Taiwan Institute of Chemical Engineers
Volume95
DOIs
Publication statusPublished - 2019 Feb

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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