publication
An academic paper on oxide-based solid electrolytes by our student, DingYuan Huang et al. has been accepted for publication in EcoEnergy.
Ga-doped Li7La3Zr2O12 was used as an oxide-based solid electrolyte to investigate in detail how the synthesis conditions and particle size affect the electrochemical and chemical stability of the solid electrolyte.
An academic paper by our student Mr. Wang Wencong et al. on oxygen reduction catalysts has been accepted for publication in The Journal of Physical Chemistry C.
The effects of crystal structure, metal valence state, and cationic vacancy concentration on ORR catalytic activity were investigated by replacing Mn ions with Co ions in the perovskite-type oxide (LaMn)1-xO3 with cation vacancies. The results showed that the Co substitution shortens the Mn-O interatomic distance and increases the activity, but at the same time lowers the concentration of Mn ions, indicating that there is an appropriate amount of Co substitution that maximizes the activity. Furthermore, the application to Zn-air batteries was also made.
An academic paper by our student Mr. Wang Wencong et al. on oxygen reduction catalysts has been accepted for publication in Journal of Alloys and Compounds.
Perovskite-type oxides (LaMn)1-xO3 with non-stoichiometric compositions of varying cationic vacancies were synthesized to investigate the effect of Mn-O bond length on the catalytic activity for oxygen reduction, and a mechanism was proposed.
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An academic paper on positive electrode active materials for magnesium rechargeable batteries by our former student Dr. Jonghyun Han et al. was selected as an supplementary cover art of The Journal of Physical Chemistry C.
An academic paper on positive electrode active materials for magnesium rechargeable batteries by our former student Dr. Jonghyun Han et al. has been accepted for publication in The Journal of Physical Chemistry C.
The mechanism of catalytic activity of positive electrode active materials for magnesium rechargeable batteries for oxidative and reductive decomposition reactions of electrolyte was comprehensively explained by a combination of experiments and calculations. Based on this mechanism, we proposed one of the design guidelines for positive electrode active materials. This is the result of joint research with Prof. Ichitsubo at Institute for Materials Research, Tohoku University and Prof. Nakayama at Nagoya Institute of Technology.
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An academic paper by our student Mr. Liu Wei et al. on oxygen evolution catalysts has been accepted for publication in Materials Advances.
We have investigated the effect of ions occupying the tetrahedral sites of spinel oxides on the catalytic activity for oxygen evolution reaction. In particular, we found that dissolution of Zn ions occupying the tetrahedral sites leads to cation defects, which facilitates adsorption of reaction intermediates, thereby enhancing the activity. We also showed that a large amount of cation defects leads to structural instability and lower activity.
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An academic paper on oxygen evolution catalyst by our student Mr. Wei Liu and graduate Mr. Kodai Kawano was selected as the Inside Back Cover of Small journal.
An academic paper by our student Mr. Liu Wei and a graduate Mr. Kodai Kawano et al. on oxygen evolution catalysts has been accepted for publication in Small.
Various types of highly active oxygen evolution oxide catalysts have been reported. However, most of them dissolve in acidic aqueous solutions due to their oxide nature. In this study, in cooperation with Prof. Ikuya Yamada’s Group at Osaka Metropolitan University, we synthesized a quadruple perovskite ruthenium oxide ACu3Ru4O12 with high stability in acidic aqueous solutions. Furthermore, we changed the valence of the Cu ion by substituting the A-site cation and clarified the correlation with the catalytic activity for the oxygen evolution reaction, and found that the oxygen evolution reaction proceeds with a dual-site mechanism involving both Ru and Cu.
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An academic paper by our student Mr. Wengcong Wang et al. on oxygen reduction catalysts has been accepted for publication in New Journal of Chemistry.
Lowering the overvoltage required for the oxygen reduction reaction to proceed is one of the most important themes for the practical application of fuel cells. In this study, we clarified that the overvoltage is significantly lowered by adding Sr to the perovskite oxide LaMnO3, and elucidated the mechanism of this reduction.
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An academic paper by our student Mr. Liu Wei et al. on oxygen evolution catalysts has been accepted for publication in RSC advances.
Using the method of depositing cobalt hydroxide on substrates by electrolysis, we have succeeded in depositing amorphous cobalt oxide on carbon paper modified with VS2 to facilitate the surface reconstruction reaction and improve the catalytic activity for the oxygen evolution reaction.
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