以二水乙酸锌、一缩二乙二醇为原料,通过溶胶-凝胶法制备出氧化锌/螺旋纳米碳纤维(ZnO/HCNFs)复合材料。使用X射线衍射仪(XRD)、热重分析仪(TG)和扫描电子显微镜(SEM)等表征手段研究了ZnO/HCNFs复合材料的形貌结构,通过恒流充放电测试仪对材料的电化学性能进行测试。结果表明:ZnO颗粒均匀负载于 HCNFs表面,粒径约为20～50nm。ZnO/HCNFs复合材料在200mA/g的电流密度下,其首次充放电比容量分别达到977mAh/g与788mAh/g,库仑效率为81%,经过100次循环以后,容量仍保持在501mAh/g,电化学性能较优异。
Zinc oxide/helical carbon nanofibers (ZnO/HCNFs) composite was prepared by sol-gel method from zinc acetate dihydrate and diethylene glycol.The morphology and structure of ZnO/HCNFs were characterized by X-ray diffraction (XRD),thermogravimetric analyzer (TG) and scanning electron microscope (SEM).The electrochemical performance of ZnO/HCNFs were tested by A constant current charge-discharge tester.The results shown that ZnO particles with the particle size of about 20～50nm were uniformly decorated on the surface of HCNFs.It's first discharge and charge specific capacity reached 977mAh/g and 978mAh/g respectively,and the coulomb efficiency was 81% under the current density of 200mA/g.After 100 cycles,the specific capacity remains at 501mAh/g,which shown excellent electrochemical performance.
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