Thermodynamic analysis of high energy density conversion type cathode materials for Na- and K-ion batteries

Yongheum Lee, Sang Ok Kim, Hyung Seok Kim, Seungho Yu

Research output: Contribution to journalArticle

Abstract

Conversion-type materials attract increasing attention for rechargeable batteries because of their high energy density compared with intercalation-type materials. However, the development of conversion materials for sodium and potassium ion batteries is in its beginnings, and a few materials have been studied. In this study, high-throughput computational screening was performed to discover high energy density conversion cathode materials for sodium and potassium batteries. Conversion reactions of cathode materials were examined using the Materials Project database. The reaction voltage curves as a function of specific capacity were obtained using grand potential phase diagram. The calculation results indicated that fluorides, chlorides, bromides, and oxides are promising conversion cathode materials, exhibiting high reaction potential and capacity. The average reaction potentials of sulfides, selenides, phosphides, and nitrides indicated that they are not appropriate materials for conversion cathodes.

Original languageEnglish
JournalInternational Journal of Energy Research
DOIs
Publication statusAccepted/In press - 2020 Jan 1
Externally publishedYes

Keywords

  • cathode
  • conversion
  • energy storage; batteries
  • high throughput screening

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

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