利用低温固相反应法制备了Mn-Pb复合氧化物超级电容器电极材料.采用XRD、TEM、循环伏安和恒流充放电法对电极材料的形貌和结构特点以及电化学性能进行了测试分析.结果表明,复合氧化物的粒径均为纳米尺寸,呈无定型结构.复合氧化物在1mol/L Na2SO4中,电位窗口为-0.2～0.9(V vs.SCE)范围内具有典型的电容特征.纳米氧化物电极比容量随放电电流的增大而减小.当放电电流为2mA时,Mn-Pb复合氧化物电极的比容量为180.5F/g.
Mn-Pb nanocomposite oxide, as electrode material for supercapacitor, was successfully prepared by solid-state reaction of KMnO4 with manganese acetate and lead acetate at low temperature. The nanocomposite oxide was characterized using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The capacitive characteristics of the nanocomposite oxide in 1mol/L Na2 SO4 aqueous electrolyte were investigated with cyclic voltammetry and chronopotentiometry in a three-electrode system. It was found that the nanocomposite oxide was amorphous with the particle size of 10nm. The nanocomposite oxide exhibited excellent capacitive properties within the potential range from -0.2～+0.9 (V vs. SCE), indicating a promising electrode material for supercapacitor. The specific capacitance of the nanocomposite oxide decreased with increasing discharge current and it was 180.5F/g by constant current discharge of 2mA.
参考文献
| [1] | Conway B E .[J].Journal of the Electrochemical Society,1991,138:1539-1548. |
| [2] | Kotz R;Carlen M .[J].Electrochimica Acta,2000,45:2483-2498. |
| [3] | Sarangapani S.;Chen CP.;Tilak BV. .MATERIALS FOR ELECTROCHEMICAL CAPACITORS - THEORETICAL AND EXPERIMENTAL CONSTRAINTS [Review][J].Journal of the Electrochemical Society,1996(11):3791-3799. |
| [4] | Pang S.C.;Anderson M.A. .Novel Electrode Materials for Thin-Film Ultracapacitors: Comparison of Electrochemical Properties of Sol-Gel-Derived and Electrodeposited Manganese Dioxide[J].Journal of the Electrochemical Society,2000(2):444-450. |
| [5] | Reddy R N;Reddy R G .[J].Journal of Power Sources,2004,132:315-320. |
| [6] | 张治安,杨邦朝,邓梅根,胡永达,汪斌华.超级电容器纳米氧化锰电极材料的合成与表征[J].化学学报,2004(17):1617-1620. |
| [7] | Jiang J;Kucernak A .[J].Electrochimica Acta,2002,47:2381-2386. |
| [8] | Chen Y S;Hu C C;Wu Y T .[J].Journal of Solid State Electrochemistry,2004,8:467-473. |
| [9] | Wu M Q;Snook G A;Chen G Z et al.[J].Electrochemistry Communications,2004,6:499-504. |
| [10] | 张治安,杨邦朝,胡永达,邓梅根,汪斌华.纳米氧化锰电极材料的制备和电容特性研究[J].无机化学学报,2005(03):389-393. |
| [11] | Broughton J N;Brett M J .[J].Electrochimica Acta,2004,49:4439-4446. |
| [12] | Jin C F;Yuan X;Ge W W et al.[J].Nanotechnology,2003,14:667-669. |
| [13] | Liu X H;Yu L .[J].Materials Letters,2004,58:1327-1330. |
| [14] | Mourad W E;Rophael M W;Khalil L B .[J].Journal of Applied Electrochemistry,1980,10:309-313. |
| [15] | 张春霞,夏熙.掺Pb改性MnO的制备及性能研究[J].电池,2002(02):63-65. |
| [16] | 周益明,忻新泉.低热固相合成化学[J].无机化学学报,1999(03):273-292. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%