Tetsuya Ōsaka

Electrochemical impedance spectroscopy (EIS) can be utilized to characterize battery features, because it allows the dynamics of each elemental process of the battery reaction to be sensitively and separately determined without destruction of the cell. In addition, EIS is expected to be utilized for premonitory diagnosis of onboard batteries in electric vehicles. Here, an overview of the recent diagnosis technologies for determining the health of commercial lithium-ion batteries (LIB) using EIS

Nitrogen doped carbon nanocapsules (NCNCs) were synthesized as a non-noble electrocatalyst for the ORR using a simple and efficient route. The NCNCs exhibited higher activity than the commercial Pt/C catalyst, excellent stability, and resistance to methanol oxidation in the oxygen reduction reaction.

An electric double layer capacitor (EDLC) was prepared with an activated carbon powder electrode with poly(vinylidene fluoridehexafluoropropylene) (PVdF‐HFP) based gel electrolyte. Ethylene carbonate (EC) and propylene carbonate (PC) were used as plasticizer and tetraethylammonium tetrafluoroborate was used as thesupporting electrolyte. An optimized gel electrolyte of mass ratio exhibited high ionic conductivity of , high electrode capacitance, and good mechanical strength. An electrode consisti

During the course of our recent work performed to develop an electroplated CoNiFe ternary alloy with high saturation magnetic flux density and low coercivity for use in magnetic recording heads, it was observed that two common sulfur‐containing additives, saccharin and thiourea, behave differently with respect to the dependence of sulfur inclusion and coercivity of the alloy film on the additive concentration in the plating bath. To understand the cause of this difference, scanning tunneling mic