Development of new catalysts using vanadate glasses for metal-air secondary batteries

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04780
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 27030:Catalyst and resource chemical process-related
• Research Institution: Kindai University
• Principal Investigator: Oka Nobuto 近畿大学, 産業理工学部, 教授 (80570209)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 空気極触媒 / バナジン酸塩ガラス / 金属空気電池

Outline of Final Research Achievements

Perovskite-type metal oxides containing rare earth elements such as lanthanum have been reported as catalytic materials for the air-electrode of metal-air battery. The goal of this research was to create new catalytic materials using "glass" that does not contain rare earth elements, which are rare metals, and also does not require a specific crystalline structure. As a result, the air-electrode catalysts using vanadate glasses containing Co3O4 were developed, and their catalytic performance was superior to that of conventional crystalline catalysts. The homogeneous arrangement of catalytic elements (e.g., Co) in the glass should result in a highly efficient electrode reaction. The atomic-scale microstructure (e.g., catalytically active sites) was also indicated to have a strong influence on catalytic performance.

Free Research Field

材料科学

Academic Significance and Societal Importance of the Research Achievements

脱炭素社会の実現だけでなく、社会インフラを効率的に管理するスマートシティなど多くの分野の技術革新が、高容量電池を無くして成立しえない。現在のリチウムイオン電池を超える高いエネルギー密度が期待される金属空気電池の実現に向けて、高効率な空気極触媒の開発が不可欠である。本研究では、希少金属である希土類元素を使用しないガラス材料により新たな空気極触媒を開発した。