Nobuko Kumagai

TL;DR: In this article, the chemical diffusion coefficients of the proton in the nickel hydroxide sample are measured by a current pulse relaxation method, showing that a smaller crystalline size gives a higher proton diffusion coefficient, giving excellent cycling behaviour.

TL;DR: In this paper, the performance of the cobalt-doped birnessite was improved by a change in the stacking structure, a decrease in the charge transfer resistance, and improved structural stability of the oxide.

TL;DR: In this paper, it was found that inorganic additives in electrolyte, such as LiI, LiBr, and NH 4 I, effectively suppressed the degradation of graphite anode to improve the battery performance.

TL;DR: In this article, the electrochemical reduction of molten Li-Na-K carbonates at the eutectic composition was performed in the range 450-700°C with an inert vitreous carbon electrode.

TL;DR: In this article, 2-vinylpyridine (VP) was used as an additive in the electrolyte to suppress the degradation of the carbon anode, which was induced by electroreduction of Mn(II) dissolved from the spinel; this step is followed by the irreversible electrochemical reaction at the graphite/(Mn deposits)/electrolyte interface.