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Electrolytic Preparation,Structure Characterization and Electro-chemical Performance of NiOOH 被引量:3

Electrolytic Preparation,Structure Characterization and Electro-chemical Performance of NiOOH
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摘要 NiOOH was prepared by one-step electrolysis of spherical Ni(OH)2 and the effects of electrolysis parameters were examined. The highly pure NiOOH was obtained after electrolysis at a current density of 60mA.g^-1 and 30℃ with anodic potential controlled in the range of 1.73-1.85V (vs. Zn/ZnO) for 360min. The NiOOH samriles were characterized bv X-ray oowder diffraction (XRD) and scanning electron microscope (SEM) analysis.Resuits indicate that the electrolysis product is spherical NiOOH doped with graphite. Charge and discharge tests show that the prepared NiOOH offers a discharge capacity of over 270mAh·g^-1 at current density of 30mA·g^-1 and can be directly used as cathode material of alkaline Zn/NiOOH batteries. Galvanostatic charge/discharge and cyclic voltammetry (CV) tests reveal good cycling reversibility, of the NiOOH electrode. NiOOH was prepared by one-step electrolysis of spherical Ni(OH)2 and the effects of electrolysis pa-rameters were examined.The highly pure NiOOH was obtained after electrolysis at a current density of 60mA·g-1 and 30℃ with anodic potential controlled in the range of 1.73—1.85V(vs.Zn/ZnO)for 360min.The NiOOH sam-ples were characterized by X-ray powder diffraction(XRD)and scanning electron microscope(SEM)analysis.Re-sults indicate that the electrolysis product is spherical NiOOH doped with graphite.Charge and discharge tests show that the prepared NiOOH offers a discharge capacity of over 270mAh·g-1 at current density of 30mA·g-1 and can be directly used as cathode material of alkaline Zn/NiOOH batteries.Galvanostatic charge/discharge and cyclic volt-ammetry(CV)tests reveal good cycling reversibility of the NiOOH electrode.
出处 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2007年第2期262-267,共6页 中国化学工程学报(英文版)
关键词 NIOOH ELECTROLYSIS current density discharge capacity cycling reversibility NiOOHNiOOH电极材料 NiOOH 电解制备 结构特性 电化学性能 电流密度 放电能力
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