在室温下用液相还原法制备了单质钴粉末.采用XRD和SEM分析了粉末的相结构和微观形貌,并研究了表面活性剂的种类及浓度、钴源浓度和还原剂浓度对粉末最终形貌的影响.结果表明,引入PVA作为表面活性剂时,有利于形成球状结构,且PVA浓度越大,颗粒尺寸越小,颗粒分布越均匀.当PVA浓度为0.5％,水合肼浓度为80％,Co2+浓度为2.5M时,所得样品呈花球状结构.恒流充放电测试结果表明,由该钴粉制备的电池负极材料样品具有较高的放电容量,最高可达533mAh/g,且高倍率放电能力良好,1500mA/g的电流密度下放电容量能达到331.4mAh/g.
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