廉价模板法制备MnO2纳米棒及其电容特性研究

The synthesis of MnO2 nanorods by cheap template method

摘要:

本文以可再生、廉价、天然多孔的锯屑为模板辅助化学溶液法成功地合成了MnO2纳米棒。借助TEM，FT-IR，XRD等分析手段对样品结构及性能进行表征。结果证实所得样品为α-MnO2纳米棒，其平均直径为10 nm左右,平均长度约为150 nm。进一步利用循环伏安和恒流充放电测试分析了样品的电容特性。结果表明：在1mol?L-1的(NH4)2SO4电解液中，0?1.0V电位区间内，充放电电流为5mA以及10mA时，所制备的α-MnO2首次放电比电容分别达到了176 F?g-1和138F?g-1。

Abstract:

In this paper, α-MnO2 nanorods were successfully synthesized by chemical solution route with the reproducible,low-cost, porous sawdust as template.The obtained samples were characterized by TEM, FT-IR and XRD tests. The results of the tests showed that the samples were α-MnO2 nanorods with diameters of about 10nm and with lengths up to 150 nm. The super electrochemical characteristics of the samples were characterized by cyclic voltammetry (CV) and constant current charge-discharge tests (CH/DCH). The results demonstrated that α-MnO2 nanorods had excellent electrochemical performance in 1.0 mol?L-1 (NH4)2SO4 electrolyte within the potential range of 0～1.0 V (vs.SCE). The initial specific capacitance of single MnO2 electrode reached 176 F譯-1 and 138F譯-1 at the current of 5 mA and 10 mA respectively.