Kyoto University · Engineering
Professor Hiroaki Konishi's research lab specializes in advanced energy storage materials and sustainable chemical processes. The lab focuses on developing next-generation fluoride shuttle batteries (FSBs) using metal fluorides like BiF₃ as high-capacity catholyte materials, with a strong emphasis on optimizing electrolyte systems through anion acceptors such as triphenylboroxine to enhance solubility and electrochemical performance. In parallel, the lab investigates regioselective chemical interesterification of vegetable oils to produce high-stability margarine basestocks, demonstrating a dual focus on clean energy technologies and green chemistry. The integration of nanomaterial design, electrochemistry, and catalytic processes defines the lab’s interdisciplinary approach.
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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