京都大学 · 工学
Konishi教授の研究室では、次世代二次電池としてのフラーレンシフト電池（FSB）の開発を主軸としており、特にビスマスフッ化物（BiF3）を活用した高容量・高サイクル性能の電極材料の創出を目指しています。有機溶媒に溶解性を高めるための添加剤（トリフェニルボロン誘導体）の開発や、ナノコンposite化による電極の導電性・安定性向上の研究が進んでいます。また、化学的関与に基づく脂肪酸配列制御技術（レジオステレオ選択的エステル交換）を応用したバイオ由来油脂の機能化にも取り組んでいます。
Figures are computed from collected data and may differ slightly.
To expand the applications of secondary batteries, we have developed a new reserve-type fluoride shuttle battery (FSB) as a promising next-generation secondary battery candidate. For a FSB, a metal fluoride and an organic solvent are applied as the active material and electrolyte, respectively, and the dissolution and deposition of the active material facilitate the electrochemical reaction. In the present study, a new electrolyte for FSBs was developed and used to investigate the electrochemica
For liquid-based fluoride shuttle batteries, electrolyte composed of organic solvent and supporting electrolyte salt is developed.To increase the solubility of supporting electrolyte salt in organic solvent, anion acceptors (triphenylboroxine or triphenylborane) are added.The addition of anion acceptor greatly increases the solubility of supporting electrolyte salt, and discharge-charge reaction of BiF3 electrode is confirmed in the prepared electrolytes.
Chemical interesterification reaction conditions that provide regioselectivity regarding fatty acid positions in triacylglycerol have been investigated. Sodium methoxide‐catalyzed ester interchange between soybean oil and methyl stearate was performed in hexane at low reaction temperature, i.e. , 30 to 60°C. The results showed regioselectivity was obtained at 30°C. The ester interchange at 1,3‐carbons progressed 1.7 times faster than at 2‐carbon of the glycerol moiety of triacylglycerol at 24 h.
Abstract Oxidative stability of products produced as potential margarine basestock from soybean oil and methyl stearate by a novel chemical regioselective interesterification was evaluated. The oxidative stability of the products was evaluated by peroxide formation and volatile analysis during storage in the dark with oxygen at 60°C for 72 h. The product obtained by regioselective interesterification resulted in the lowest peroxide formation and volatile concentration sample in comparison with s
Abstract We previously developed a fluoride shuttle battery containing a bismuth(III) fluoride (BiF 3 ) electrode; however, the battery exhibited several drawbacks including poor cycling performance and low practical capacity. In this research, to obtain a BiF 3 electrode with high cycling performance and practical capacity, an electrolyte containing triphenylboroxine as an anion acceptor was used, as previously reported. Moreover, BiF 3 was pulverized and adhered with conductive material using
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