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論文

Electron storage performance of hybrid materials comprising polyoxometalates and carbon nanohorns as cathode-active materials

若松 勝洋*; 関原 輝昇*; 山口 慶彦*; 松島 諒*; 松村 大樹; Kuila, T.*; 吉川 浩史*

Batteries & Supercaps (Internet), 6(1), p.e202200385_1 - e202200385_8, 2023/01

 被引用回数:1 パーセンタイル:31.35(Electrochemistry)

Nanohybrid materials comprising polyoxometalates (POMs) and nanocarbons have attracted considerable attention as electrode-active materials for rechargeable lithium-ion batteries (LIBs). These materials exhibit multi-electron redox reactions, resulting in an improved battery capacity. This study focuses on carbon nanohorns (CNHs) as a nanocarbon material and evaluates the battery performance using POM/CNH hybrids as cathode-active materials. X-ray absorption fine structural analysis was performed to investigate the reaction mechanism of these hybrids. POM/oxidized CNH (CNHox) hybrid materials maintain high capacities at high current densities as the high surface area availability of CNHox leads to high electrical double-layer capacitances. These findings show an improved performance of the as-developed material when compared with those reported in previous papers and can contribute toward an improved design of cathode-active materials for high-performance supercapacitors.

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