Controlling the intercalation chemistry to design high-performance dual-salt hybrid rechargeable batteries

Jae Hyun Cho, Muratahan Aykol, Soo Kim, Jung Hoon Ha, C. Wolverton, Kyung Yoon Chung, Kwang Bum Kim, Byung Won Cho

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

We have conducted extensive theoretical and experimental investigations to unravel the origin of the electrochemical properties of hybrid Mg2+/Li+ rechargeable batteries at the atomistic and macroscopic levels. By revealing the thermodynamics of Mg2+ and Li+ co-insertion into the Mo6S8 cathode host using density functional theory calculations, we show that there is a threshold Li+ activity for the pristine Mo6S8 cathode to prefer lithiation instead of magnesiation. By precisely controlling the insertion chemistry using a dual-salt electrolyte, we have enabled ultrafast discharge of our battery by achieving 93.6% capacity retention at 20 C and 87.5% at 30 C, respectively, at room temperature.

Original languageEnglish
Pages (from-to)16116-16119
Number of pages4
JournalJournal of the American Chemical Society
Volume136
Issue number46
DOIs
Publication statusPublished - 2014 Nov 19

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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