摘要
以硫酸钴和氧化石墨为原料,采用化学沉淀法制备出疏松多孔的片状Co(OH)_2/GO复合物。复合物的结构和形貌用X射线衍射(XRD)、场发射扫描电镜(SEM)进行了表征;用傅里叶变换红外光谱(FT-IR)对样品的成分进行了测定;复合物的电化学性能用循环伏安、恒电流充放电等测试方法进行了测试。经分析测试结果,发现采用该方法制备的样品,其电化学性能与氧化石墨的含量有关;当氧化石墨含量为10%时性能最佳,比电容达到1498F/g。此外,电流密度为1A/g时,600次充放电循环后比电容仍保留了初始值的85.3%。因此,Co(OH)_2/GO复合物有望成为电化学电容器电极材料。
Co(OH)2/GO composites with porous and layered structure were prepared by chemical precipitated method in which cobalt sulfate and graphite oxide were used as the raw material. The as-prepared materials were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). The composition of the Co(OH)2/GO composite was analyzed through fourier transform infrared spectroscopy (FT-IR). The electrochemical performance of Co(OH)2/GO composite was evaluated using Cyclic voltammetry (CV) and galvanostatic charge/discharge method. The measurements showed that the electrochemical properties of the samples prepared by this method are related to the content of graphite oxide. When the content of graphite oxide is 10%, the performance is uppermost, capacitance achieved 1498F/g. In addition, when the current density is 1A/g, 85.3% of the initial value was retained after 600 charge-discharge cycles. Therefore, the Co(OH)2/GO composite is expected to be electrochemical capacitor electrode material.
作者
陈艳丽
陈卫东
胡中爱
CHEN Yan-li1,CHEN Wei-dong1,HU Zhong-ai2(1.Career Technical College, Gansu nonferrous metallurgy,Jinchang 737100,China;2.Key Laboratory of the Ministry of education, Ministry of education,ecological environment related polymer materials, Northwest Normal University, School of chemistry and chemical engineering, Northwest Normal University, Key Laboratory of polymer materials in Gansu,Lanzhou 730070,Chin)
出处
《世界有色金属》
2018年第2期222-224,共3页
World Nonferrous Metals
基金
2017年甘肃省科技厅中小企业创新资金项目17CX2JA016
2016年甘肃省科技厅中小企业创新资金项目1608JCCC070
2015年金昌市青年人才基金项目编号:jrc2015-76-9
甘肃省教育厅高等学校科研项目(批准号:2013A-156)
2015年甘肃省教育厅高等学校科研支持项目,批准号:2015B-199
金昌市重点工业项目,编号:2016003