片状四氧化三钴的制备及其电性能研究  

The Preparation of Flake-like Cobalt Oxide and Its Electrical Performance

作　　者：方璐[1] 姚如富[1] 薛燕[1] 

机构地区：[1]合肥师范学院化学与化学工程学院,安徽合肥230601

出　　处：《黄山学院学报》2015年第3期46-49,共4页Journal of Huangshan University

基　　金：安徽省教育厅自然科学研究重点项目(KJ2014A201);安徽省教育厅教学研究项目(2014jyxm279);合肥师范学院科研项目(JX201412)

摘　　要：研究前驱物浓度、超重力大小、反应时间和反应温度对Co3O4前驱物形貌的影响,发现制备片状Co3O4前驱物的最优条件是Co(NO3)2·6H2O和CO(NH2)2在1000/g超重力场、二氯苯/水溶液体系、150℃条件下水热反应30min,通过前驱物的热分解制得Co3O4,采用SEM、XRD和BET对样品的形貌、物相和孔径大小进行表征。将Co3O4粉末分别与乙炔黑、聚四氟乙烯(PTFE)按一定质量比混合压在镍网上,制成电极片,经CV测试其电性能,结果发现超重力越大,制备的材料的交流阻抗值越小。The effects of the precursor concentration, the relative centrifugal field, reaction time and temperature on the formation of the precursor of Co3O4 are investigated. The results reveal that the optimal condition for preparing the flake-like precursor of Co3O4 is in the aqueous solution/ dichlorobenzene system under 1000/g relative centrifugal field at the temperature of 150℃ with the reaction time of 30 mins. The Co3O4 powder is obtained by calcinating its precursor at specific temperature. The resultant samples are characterized by scanning electron microscopy（SEM）, powder X-ray diffraction（XRD） and BET. The electrodes are made by Co3O4, acetylene black and PTFE according to certain mass proportion and evaluated by CV. It＇s found that the bigger the size of the relative centrifugal field is, the smaller the value of the Ac impedance is.

关 键 词：水热法 超重力 CO3O4 电性能 

分 类 号：O636.21[理学—高分子化学]