纳米二氧化锰的可控制备及其电化学储能机理研究  

Synthesis and electrochemical characterizations of nanosized manganese dioxides

作　　者：吴彻平[1] 彭家惠[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400045

出　　处：《功能材料》2011年第2期359-361,共3页Journal of Functional Materials

摘　　要：通过添加十二烷基溴化氨(CTAB)利用液相沉淀法制备了不同形貌的纳米二氧化锰,用扫描电镜、X射线衍射、孔结构以及循环伏安法等分析研究了CTAB添加量对二氧化锰形貌和电化学性能的影响。结果表明,随着CTAB添加量的增加,二氧化锰形貌从长棒状到均匀球状发生规律变化,此外随着颗粒尺寸变小,二氧化锰比容量从162F/g提高到了213F/g。A series of nanosized manganese dioxides have been synthesized via a co-precipitation process with additive of CTAB.SEM result indicated that with additive of CTAB,MnO2 nanosphere with about 20nm in diameter and a narrow particle size distribution has been obtained,comparable with nanorode morphology with a wide particle size distribution synthesized without CTAB.The adding amount of CTAB has been studied by SEM,XRD,N2 adsorption and desorption and cyclic voltammetric tests.The results found that as the decrease in particle size of MnO2,the specific capacitance of MnO2 increased from 162 to 213F/g.

关 键 词：二氧化锰 十二烷基溴化氨 共沉淀法 形貌 

分 类 号：TB332[一般工业技术—材料科学与工程]