溶剂热法制备α-V_2O_5空心纳米微球及其电化学性能研究  

Preparation of hollowα-V_2O_5 nanosphere as novel electrode material for supercapacitor through solvothermal method

作　　者：梁健 杨飞 张永明[1] 范例 

机构地区：[1]重庆市生态环境监测中心,重庆401147 [2]重庆大学化学化工学院,重庆400044

出　　处：《化工新型材料》2017年第9期121-123,共3页New Chemical Materials

摘　　要：采用环保经济的溶剂热法,在不使用任何模板和催化剂的条件下,以乙二醇为溶剂,制得由五氧化二钒(V_2O_5)纳米棒组成的α-五氧化二钒(α-V_2O_5)空心纳米微球。经过X射线粉末衍射(XRD)、扫描电子显微镜(SEM)分析可知,α-V_2O_5空心纳米微球直径约2μm,壁厚约250nm。将α-V_2O_5空心纳米微球作为超级电容器的电极材料,在1mol氯化钾(KCl)水系电解质和1mol聚乙烯醇(PVA)/氯化锂(LiCl)(PVA/LiCl)固体电解质分别进行电化学性能测试,结果显示,在充放电电流密度为1mA/cm2时,在固体电解质中,α-V_2O_5空心纳米微球电级的比电容达到346mF/cm2,进行6000次循环充放电后,材料的容量保持率高达82%。α-V_2O_5空心纳米微球具有良好的超级电容器性能。Theα-vanadium pentoxide（α-V2O5）hollow nanospheres were prepared by agreen,practical solvothermal method in ethylene glycol without any templates.The as-prepared hollow nanospheres had a diameter of around 2μm and wall thickness about 250 nm,in which had a highly open architecture formed byα-V2O5 nanorods during the process of Ostwald ripening.Therefore,theα-V2O5 hollow nanosphere electrodes exhibited exceptional specific capacitances of698mF/cm^2 and 346mF/cm^2 at the current density of 1mA/cm^2 in 1mol KCl solution and 1mol PVA/LiCl solid electrolyte,respectively.Moreover,the electrode had good cycling electrochemical stability with 82% of its initial value after 6000 cycles.The outstanding performance of theα-V2O5 hollow nanospheres revealed its potential to be a promising material for supercapacitor.

关 键 词：超级电容器 α-V2O5 溶剂热 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TM53[电气工程—电器]