京都大学 · 工学
Miyazaki教授の研究室では、次世代エネルギー変換・貯蔵技術の実現を目指し、亜鉛酸化物電極のデンドライト抑制機構や、ペロブスカイト酸化物とカーボンナノチューブを組み合わせた高効率な酸素還元触媒の開発を進めています。特に、イオン選択透過性を有する高分子膜を用いた電極設計や、電気スプレー焼成法によるナノ構造材料の精密合成が特徴です。これらの研究は、高効率で長寿命な電池や燃料電池の開発に貢献しています。
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Zinc oxide electrodes modified with an anion-exchange ionomer (AEI) are fabricated to suppress the dendrite formation of metallic zinc deposition. Charge-discharge measurements show that the discharge capacities and efficiencies of AEI-modified ZnO electrodes are superior to those of bare ZnO electrodes. These improvements are explained by the selective ion permeation through the AEI films. In addition, we demonstrate that the AEI-modified ZnO electrodes work well as a rechargeable negative elec
Composites of nano-sized perovskite-type oxides of La1−xSrxMnO3 (LSMO) and carbon nanotubes (CNTs) were synthesized in a single step by the electrospray pyrolysis method, and their electrocatalytic activities for oxygen reduction were evaluated in an alkaline solution. The resulting LSMO nanoparticles with a diameter of less than 20 nm were well dispersed and deposited on the surface of CNTs. Elemental analysis showed that the metal-composition of LSMO/CNT composites was controlled by altering t
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