碳纳米花的制备及其电化学表征  

Preparation and electrochemical characterization of carbon nano-flowers

作　　者：胡中爱[1] 王晓彤 王欣欣 HU Zhong-ai;WANG Xiao-tong;WANG Xin-xin

机构地区：[1]西北师范大学化学化工学院,生态环境相关高分子材料教育部重点实验室,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2018年第2期58-62,共5页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(20963009,21163017,21563027,21773187)

摘　　要：以醋酸纤维素(CA)为碳源,氧化锌纳米花为模板,通过高温炭化方法制备了碳纳米花材料(CNF).采用扫描电镜(SEM)、X-射线衍射(XRD)和拉曼光谱等方法对所制备的碳纳米花的结构和形态进行了表征,并通过三电极体系对碳纳米花材料的电化学性能进行了研究.结果表明,该电极材料在1A·g^(-1)的电流密度下比电容可达229.7F·g^(-1),同时显示出优异的倍率性能,在电流密度为100A·g^(-1)下比电容仍然保持初始值的78.4%,并且该材料具有超高的循环稳定性,经过6 000圈恒电流充放电循环,比电容保持了初始值的100%.Carbon nano-flowers(CNF)are prepared via a high-temperature carbonization process,in which the cellulose acetate(CA)and the nano-ZnO flowers are used as carbon sources and templates,respectively.The morphology and structure of CNF are characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD)and Raman spectrum.The electrochemical performances of CNF are measured in the three-electrode system.The results show that the specific capacitance of CNF electrode is up to 229.7 F·g-1 at the current density of 1 A·g-1,and retains 78.4%at 100 A·g-1,which shows an excellent rate capability.The CNF exhibits an ultrahigh cycle stability with no capacitance decay after 6 000 cycles.

关 键 词：模板法 醋酸纤维素 碳纳米花 电化学 

分 类 号：TQ127.11[化学工程—无机化工] O646[理学—物理化学]