Co_3O_4的制备及电化学性能  

Electrochemical performance of prepared Co_3O_4 materials

作　　者：范书琼 孔令斌[1,2] 王儒涛[1,3] 康龙[2] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050 [2]兰州理工大学材料科学与工程学院,甘肃兰州730050 [3]中国科学院兰州化学物理研究所,甘肃兰州730000

出　　处：《化工进展》2013年第S1期168-173,共6页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(21163010);教育部科学技术研究重点项目(212183);甘肃省杰出青年科学基金(1111RJDA012)项目

摘　　要：介绍了络合物解离和固相氧化的方法制备Co3O4纳米材料,通过X-粉末衍射(XRD)对Co3O4的组成及晶体结构进行表征,扫描电镜(SEM)和透射电镜(TEM)对Co3O4的形貌进行表征。电化学性能研究表明,Co3O4纳米材料为孔状结构,具有较高的比电容(310F/g)、倍率性能和循环稳定性(1000次循环后容量保持率为89.6%)。作为锂离子电池阳极材料具有较高的首次放电容量。The introduction of the synthesized Co3O4 nanomaterials through complex dissociation and pyrolysis of loosely packed Co3O4/Co(OH)2 nanosheets,the crystal structure and morphology of the prepared Co3O4 materials are characterized by X-ray powder diffraction(XRD),scanning electron microscopy(SEM)and transmission electron microscopy(TEM).The synthesized Co3O4 materials show lowly crystalline and ultrafine sphere-like particles with hole structure.The fabricated materials exhibit high capacitance of 310F/g,enhanced rate capability,and excellent electrochemical stability(89.6% retention after 1000 cycles).It is tested as the anode material of lithium-ion batteries(LIBs),the as-prepared Co3O4 nanoparticles exhibited excellent lithium storage capacity with the initial discharge capacity of 1254mA·h·g-1.

关 键 词：CO3O4 CO(OH)2 超级电容器 锂离子电池 

分 类 号：TQ138.12[化学工程—无机化工] TM912[电气工程—电力电子与电力传动]