水热法合成α-MnO_2纳米棒及其电化学性能  

Hydrothermal Synthesis of α-MnO_2 Nanorods and Their Electrochemical Performances

作　　者：薛兆辉[1] 刘兆临[2] 马方伟[1] 孙丽萍[1] 霍丽华[1] 赵辉[1] 

机构地区：[1]黑龙江大学化学化工与材料学院,功能无机材料化学省部共建教育部重点实验室,哈尔滨150080 [2]大连经济技术开发区环境保护监测中心,大连116600

出　　处：《无机化学学报》2012年第4期691-697,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.51072048);黑龙江省科技攻关项目(No.GZ09A204);黑龙江省自然科学基金(No.B201107)资助项目

摘　　要：以KMnO4、氧化石墨（GO）和硫酸为原料,在120℃水热条件下3 h成功合成了直径为10~20 nm,长度为300~400 nm的α-MnO2纳米棒。研究发现GO的引入降低了纳米棒的制备温度,缩短了反应时间。电化学测试结果表明,在1 mol.L-1Na2SO4中性水系电解液中,该纳米棒表现出良好的电容性能,当扫描速率分别为2 mV.s-1和5 mV.s-1时,比电容分别为276 F.g-1和240F.g-1;该纳米材料是一种潜在的电化学电容器电极材料。a-MnO2 nanorods were prepared by hydrothermal treatment of KMnO4, GO （graphite oxide）and sulfuric acid at 120 °C for 3 h. The nanorods have a diameter of 10-20 nm and a length of 300-400 nm. The introduce of GO reduces the preparation temperature of nanorods and shorten the reaction time. The electrochemical results indicate that ce-MnO2 nanorods show fine capacitive behavior in neutral aqueous electrolyte （1 mol-L-1 Na2SO4）, When the scan rates were 2 mV＂ s-1 and 5 mV .s-1, the specific capacitances were 276 F .g-1 and 240 F .g-l, respectively. This ct-MnO2 nanorods is a potential electrode material for electrochemical capacitors.

关 键 词：二氧化锰 纳米棒 水热法 电化学电容器 

分 类 号：O614.711[理学—无机化学] TM15[理学—化学]