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- W2225476822 abstract "Introduction In Ni-MH and Ni-Cd batteries, the NiOOH/Ni(OH)2 positive electrode is reversibly transformed between Ni(OH)2 and NiOOH in chargedischarge processes. It is known that additives such as CoO and Co(OH)2 can improve the utilization of the positive electrode active material because they are irreversibly transformed into conductive CoOOH during the first charging, and then form an additional conducting network on the active material surface. Oshitani et al. found that Co(OH)2, formed by the dissolution of a divalent Co-based precursors such as CoO into the electrolyte as a Co (II) complex ion such as Co(OH)4 and then reprecipitation around the platelets of Ni(OH)2, was oxidized to CoOOH during the first charging, leading to the formation of a conductive network on the surface. As a result, the utilization of the positive electrode active material significantly improved. Recently, in relation to the activation method of the Co-coated NiOOH/Ni(OH)2 positive electrode, we unexpectedly found that a simple pretreatment (discharging before initial activation) could improve highrate dischargeability (HRD) and charge transfer resistance (Rct). In this study, we characterize the positive electrode after pretreatment and investigate the effect of pretreatment on Co(OH)2 electrode properties." @default.
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- W2225476822 date "2010-01-01" @default.
- W2225476822 modified "2023-09-25" @default.
- W2225476822 title "Effect of Pretreatment on Surface Structure of Co-Coated NiOOH/Ni(OH)2 Positive Electrode for Ni-MH Batteries" @default.
- W2225476822 doi "https://doi.org/10.1149/ma2010-02/4/220" @default.
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