第 47 卷第 6 期 Vol. 47 No. 6 2017 年 12 月 Dec 2017

所属栏目：功能材料 中空CoMn2O4／石墨烯气凝胶复合物的制备及其电化学性能

王 琪，张立新，张少梅，倪昌辉，孟亚娟 （中北大学 化学工程与技术学院，山西 太原 030051）

摘　要：以碳球为模板通过溶剂热-煅烧的方法合成中空CoMn2O4，并对其表面进行阳离子改性。以改性CoMn2O4和氧化石墨烯（GO）为原料，使用水热法及冷冻干燥技术制备出中空CoMn2O4／石墨烯气凝胶（GA）复合物。采用TEM、SEM、XRD、BET对样品的形貌和结晶结构进行表征；采用CHI660E电化学工作站对样品进行电化学性能评估。结果表明，中空CoMn2O4纳米球紧紧地固定在三维多孔网络结构GA中，GA的掺入不仅有效缓解了充放电过程中CoMn2O4负极的体积膨胀效应，也加快了锂离子电子传输速率，进而大大提高了电池的循环性能和倍率性能。

关键词：中空；CoMn2O4；石墨烯气凝胶；电化学性能

中图分类号：TM919.2　　文献标识码：A　　文章编号：1009-9212（2017）06-0050-05

Preparation and Electrochemical Performance of Hollow CoMn2O4/Graphene Aerogel Hybrids

WANG Qi, ZHANG Li-xin, ZHANG Shao-mei, NI Chang-hui, MENG Ya-juan (School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China)

Abstract：The hollow CoMn2O4 was synthesized by a solvothermal-anneal method using carbon spheres as template, and the surface was further modified by cation. The hollow CoMn2O4/GA hybrids were prepared by a hydrothermal method and freeze-drying technique using the hollow CoMn2O4 and GO as raw materials. TEM, SEM, XRD, and BET were used to characterize the morphology and crystallographic structures of the samples. The electrochemical workstation was used to evaluate the electrochemical properties of the samples. The results revealed that the hollow CoMn2O4 was tightly anchored on the 3D porous network structure of GA. The introduce of GA was not only to effectively relieve volume expansion of CoMn2O4 anode during the discharge-charge process, but also facilitated lithium ion and electron transport rate. Thus, the cycling performance and rate-capability of battery were greatly improved.

Key words：hollow; CoMn2O4; graphene aerogels; electrochemical performance

基金项目：中北大学化学工程与技术学院研究生科技项目基金。

作者简介：王 琪（1990-），女，山西吕梁人，硕士研究生，研究方向：锂离子电池电极材料。

收稿日期：2017-11-08