化学共沉淀法合成氢氧化镍,并在表面用"梯度共晶法"复合包覆Co(OH)x+Yb(OH)3.XRD,XPS,SEM表征结果表明:制备的样品为六方球形β-Ni(OH)2,表面包覆了Co(OH)x+Yb(OH)3,Co的存在形式应该主要为Co2+及少量的Co3+.65℃下0.2C,1C和3c恒电流充放电时,复合包覆Co(OH)x+2%Yb(OH)3的氢氧化镍的放电比容量和放电效率最大.大倍率充放电和循环稳定性等性能也得到改善.
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