摘要
采用水热法,将硝酸钴和尿素的混合溶液经160℃的水热反应制备前驱体,再经350℃煅烧,制得了Co3O4材料。通过X射线衍射分析(XRD)和扫描电子显微分析(SEM)对材料进行了微观组织和结构表征,结果表明该材料具有薄片状形貌,且薄片具有介孔结构,由纳米颗粒组装而成。将该片状介孔Co3O4材料用于锂离子电池负极,并进行了恒流充放电及循环伏安等电化学性能测试,得出该材料的首次放电和充电容量分别为1020mAh/g和730mAh/g,循环40周之后的充电容量为520mAh/g。
Co3O4 was prepared by hydrothermal process at 160℃,starting from the mixed solution of cobalt nitrate and urea as raw materials to a calcination process in air at 350℃.The microstructure and morphology of the products were characterized by means of X-ray diffraction(XRD)and scanning electron microscopy(SEM).The material has sheet morphology,and the sheet exhibits a mesoporous structure which is constructed by Co3O4 nanoparticles.The electrochemical performances as anode materials of lithium ion batteries were investigated by galvanostatic charge-discharge cycle and cyclic voltammetry(CV)tests.The results show that mesoporous Co3O4 sheets exhibit initial discharge and charge capacities of 1020 and730mAh/g,respectively,and the charge capacity remains 520mAh/g after 40cycles.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2014年第2期276-279,312,共5页
Journal of Materials Science and Engineering
基金
国家级大学生创新创业训练计划资助项目(201310350004)
浙江省大学生科技创新活动计划(新苗人才计划)资助项目(2012R428027)
