空心Fe_2O_3微球负极材料的制备及电化学性能研究  

Preparation and electrochemical properties of hollow Fe_2O_3 microspheres for anode materials

作　　者：汪婷[1] 郑浩[1,2] 李琳[1,2] 程劲松[1] 王石泉[2] 

机构地区：[1]安顺学院功能材料与资源化学重点实验室,贵州安顺561000 [2]湖北大学有机化工新材料湖北省协同创新中心,湖北武汉430062

出　　处：《电源技术》2017年第2期192-194,共3页Chinese Journal of Power Sources

基　　金：贵州省三方联合基金[黔科合LH字(2015)7695号];贵州省教育厅功能材料与资源化学特色重点实验室开放基金(GAFMRC201305);大学生创新创业训练计划项目(201210512056)

摘　　要：以FeCl_3·7 H_2O和尿素为原料,采用水热合成法制备了空心Fe_2O_3微球。探讨不同合成温度对样品形貌的影响,利用X射线衍射光谱法(XRD)、扫描电子显微镜法(SEM)等分析技术对样品的结构、形貌进行了系统的研究,采用恒流充放电等方法测试了材料的电化学性能。结果表明:空心Fe_2O_3微球由二维纳米片自组装而成,当合成温度为200℃时,制备的样品具有良好的电化学性能,电流密度为200 m A/g,首次放电比容量为1 415 m Ah/g,可逆比容量为955m Ah/g,具有较好的循环性能和倍率性能。Hollow Fe2O3 microspheres were synthesized by a hydrothermal process with FeCI3-7 H2o and urea as raw materials. The structure and morphology were characterized by XRD and SEM. The electrochemical performance was studied by galvanostatic charge-discharge test. The results show that the samples are hollow Fe2O3 microspheres, which are composed of nanosheets with the thickness of about 100 nm. The 3D hollow Fe2O3 microspheres synthesized at 200 ℃ exhibit the best electrochemical properties with a reversible discharge capacity of 955 mAh/g at a current density of 200 mNg. These results indicate that the lithium-ion batteries （LIBs） are with better cycling performance and rate capability.

关 键 词：FE2O3 空心微球 锂离子电池 负极材料 

分 类 号：TM912.9[电气工程—电力电子与电力传动]