物理化学学报2009，Vol.25Issue(5)：987-993,7.
低热固相法制备纳米MnO2/CNT超电容复合电极的循环稳定性
Improved Cyclability of Nano-MnO2/CNT Composite Supercapacitor Electrode Derived from Room-Temperature Solid Reaction
摘要
Abstract
To improve the charge/discharge cycle stability of a nanostructured manganese dioxide electrode for supercapacitor applications,a series of nano-MnO2/carbon nanotube(CNT)hybrid electrode materials with different mass fractions of CNTs were prepared.The materials were prepared using a room-temperature solid-grinding reaction between Mn(Oac)2·4H2O and NH4HCO3 in the presence of CNTs to obtain a precursor.This was followed by calcination and all acid-treatment process and the products were characterized by X-ray diffraction(XRD),transmission electron microscopy(TEM),and Brunauer-Emmett-Teller(BET)surface analysis.XRD results indicated that the MnO2 in the composites was nanostructured γ-MnO2.Electrochemical performance of the MnO2/CNT composite electrodes in 1mol·L-1 LiOH alkaline aqueous electrolyte was studied and compared to a pure nano-MnO2 electrode without CNTs.The MnO2/CNT composite electrodes with 10%or 20%(w,mass fraction)CNTs showed far superior cycle stability than the pure MnO2 electrode.The MnO2/CNT composite electrode with 10%CNTs exhibited good cycling stability and also a high specific capacitance of 200 F·g-1 at a high charge/discharge current rate of 1000 mA·g-1.关键词
纳米MnO2/CNT复合电极/超电容性能/循环稳定性/低热固相法/LiOH电解质Key words
Nanostructured manganese dioxide/carbon nanotube composite/Super capacitive property/Cyclability/Room-temperature solid-grinding reaction/Lithium hydroxide electrolyte分类
化学化工引用本文复制引用
胡洁,袁安保,王玉芹,王秀玲..低热固相法制备纳米MnO2/CNT超电容复合电极的循环稳定性[J].物理化学学报,2009,25(5):987-993,7.基金项目
上海市教育委员会重点学科建设项目(J50102)资助 （J50102）
