纳米钴铜复合氧化物的制备与电化学性能

Preparation and electrochemical properties of cobalt-copper nanocomposite oxides material

采用沉淀法制备了作为锂离子电池负极材料的纳米钴铜复合氧化物粉末,并用X射线衍射(XRD)对其结构进行了分析,透射电镜对其形貌进行了表征,通过充放电和循环试验,对其电化学性能进行了测试。结果表明,采用沉淀法可以制备出颗粒粒度分布较集中,尺寸为20 nm的钴铜复合氧化物;充放电过程中从40周到50周,钴铜复合氧化物放电比容量由316 mAh/g衰减到309 mAh/g,放电容量保持率较高(98%),说明纳米钴铜复合氧化物具有较高的放电容量和良好的循环性能。

Nanocomposite oxides materials（Co3O4-CuO） as anode materials for lithium-ion batteries were synthesized via precipitation method.The crystalline structure and the electrochemical performance of the as-synthesized samples were investigated.The results show that the nanocomposite oxides materials are Co3O4-CuO nanocomposites,and the diameter of the as-prepared particles is around 20 nm.The Co3O4-CuO nanocomposites exhibits excellent electrochemical performance： from the 40 th cycle to the 50th cycle,the discharge capacity decreases from 316 mAh/g to 309 mAh/g,and the capacity retention is 98%.