摘要
以绿色环保的马铃薯淀粉为前驱体,通过添加分散剂制备单分散淀粉基炭微球,大大缩短了炭微球的制备时间。采用扫描电子显微镜(SEM)、X射线衍射(XRD)以及红外(FT-IR),对所得样品的形貌与结构进行表征,采用77K条件下的N2吸附,表征样品的孔隙结构。将制备的炭微球用作锂离子电池负极材料,进行电化学性能测试。结果表明:加入分散剂制备的炭微球具有更低的比表面积,稳定化8h,铁粉添加比例为100%时,炭微球的比表面积为297m^2/g,总孔容为0.16cm^3/g,在50m A/g的电流密度下,炭微球的首次放电比容量为786mAh/g,充电比容量为436mAh/g,材料表现出优良的循环性能与倍率性能。
Potato starch, an environmentally friendly biomass with natural spherical structure, has been used to prepare carbon spheres by adding a dispersant to shorten the preparation time. The morphology and structure of the samples were characterized by scanning electron microscopy（SEM）、X-ray diffraction（XRD）、 infrared spectrometry（FT-IR）and N2 adsorption-desorption techniques at 77 K. The prepared carbon microspheres were used as anode materials for lithium-ion battery, and the electrochemical performance was tested. The results show that the carbon spheres prepared with dispersant have lower specific surface area. When the proportion of iron powder is 100% and the stabilization time is 8 h, the BET surface of the carbon microspheres is 297 m2/g and the total pore volume is 0.16 cm3/g. The first discharge specific capacity of carbon spheres is 786 m Ah/g, and the charge specific capacity is 436 m Ah/g at a current density of 50 m A/g, showing excellent cycle performance and rate performance.
作者
杨琳
曹瑞雄
李想
宋怀河
YANG Lin;CAO Rui-xiong;LI Xiang;SONG Huai-he(State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China;Changzhou Institute of Advanced Materials, Beijing University of Chemical Technology, Changzhou 213164, China.)
出处
《炭素》
2018年第2期11-15,共5页
Carbon
关键词
淀粉
分散剂
炭微球
电化学性能
starch
dispersant
carbon spheres
electrochemical performance
