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Nickel oxyhydroxide (NiOOH) as the raw positive electrode materials for alkaline Zn–NiOOH batteries was obtained by chemical oxidation of spherical β-Ni(OH) 2 . The effects of preparation conditions on the oxidation state of Ni in products were systematically investigated by changing the KOH concentration, molar ratio of K 2 S 2 O 8 /β-Ni(OH) 2 , oxidation time...
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