Sb_2O_3添加剂对超电容器用电极材料——改性氮化钼电极性能的影响  

Effect of Sb_2O_3 on Properties of Modification Molybdenum Nitride Electrode for Supercapacitor

作　　者：李学良[1] 赵东林[1] 尤亚华[1] 鲁道荣[1] 

机构地区：[1]合肥工业大学化工学院,合肥230009

出　　处：《有色金属》2004年第41期30-33,共4页Nonferrous Metals

基　　金：安徽省自然科学基金资助项目 (0 10 44 3 0 2)

摘　　要：MoO3和Sb2 O3混合物与NH3通过程序升温反应制备电极材料 ,用XRD和SEM方法表征反应产物。SEM表明 ,电极成膜物质为纳米晶体。电化学方法证明 ,该材料制备的电极具有典型的电容性能 ,经Sb改性后的γ Mo2 N复合电极“准电容”的比容量提高近 1 6倍 ,在酸性电解液中有优良的电化学活性 ,循环伏安测试在 -0 4V之后极化程度小 ,电位下降趋势明显减缓 ,是一种具有发展潜力的储能材料。Molybdenum nitride is prepared by gas solid reaction of ammonia with molybdenum trioxide and Sb 2O 3 under temperature program control. The products are inve stiga ted by means of cyclic voltammetry, XRD and SEM. It is indicated by the SEM ana l ysis that nanophase γ-Mo 2N in electrode film is formed from the nitration of Mo O 3 and Sb 2O 3. It is verified by the electrochemical test that the electro de made from the nanophase γ-Mo 2N has typical capacitor properties, and the specifi c c apacity of the “pseudo-capacitance” with γ-Mo 2N electrode modified by Sb is inc reased by a factor of 160%. The electrode material presents an excellent electr o chemical activity, and a relatively weak polarization above -0.4V in cyclic vol t ammetry measurement. It is a potential material in energy conservation for futu re development.

关 键 词：SB2O3 改性 成膜物质 钼电极 MoO3 添加剂 NH3 超电容器 电极材料 电容性能 

分 类 号：TG174[金属学及工艺—金属表面处理] TM53[金属学及工艺—金属学]