次世代リチウム空気電池に向けた多元素ハイエントロピー新ナノ合金電極の開発

2022 Fiscal Year Annual Research Report

• Project/Area Number: 22F22063
• Allocation Type: Single-year Grants
• Research Institution: National Institute for Materials Science
• Principal Investigator: 山内 悠輔 国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, MANA主任研究者 (10455272)
• Co-Investigator(Kenkyū-buntansha): NANDAN RAVI 国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 外国人特別研究員
• Project Period (FY): 2022-07-27 – 2025-03-31
• Keywords: Porous materials

Outline of Annual Research Achievements

The work involved conducting extensive experimental studies aimed at identifying the most promising combinations of elements for developing high entropy alloy (HEA) nanostructures. We focused on a set of elements, including Fe, Co, Ni, Mn, and Cr, which have similar atomic size and electronegativity. To catalyze hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and chlorine evolution reaction (CER), we developed a single-step pyrolysis technique to synthesize a high entropy alloy of Cr, Mn, Fe, Co, and Ni on a conductive carbon substrate.

Current Status of Research Progress

1: Research has progressed more than it was originally planned.

Reason

Our method leveraged the synergistic effects of mixed metal (cocktail effect) high entropy alloys for enhanced catalytic performance.

Strategy for Future Research Activity

We aim to write and publish a manuscript on FeCoMnNiCr based HEA carbon nanocomposites in a reputed journal. I also plan to explore PtPdRuMoNi and/or PtPdRuIrRh to develop mesoporous HEA nanostructures for sustainable reactions like hydrogen/oxygen evolution and nitrogen/oxygen reductions.