| Autor: |
Huihui Wang, Wenqin Dai, Xiaowu Sun, Shiyong Wang, Huining Wang, Mengyu Gan, Li Ma, Tao Zhou |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
Electrochimica Acta. 180:977-982 |
| ISSN: |
0013-4686 |
| DOI: |
10.1016/j.electacta.2015.09.056 |
| Popis: |
A new binary composite of MnO2/PANI has been synthesized as electrode material for energy storage. In the composite, the MnO2 nanospheres with a honeycomb-like structure are coated with PANI layers, in which MnO2 serve as a scaffold for PANI layer and PANI act as a protective coating layer to restrain MnO2 nanospheres from dissolution in acidic electrolyte, and causing a synergic effect. The composite, when the mass ratio of MnO2 and aniline is 1:1, exhibits a high specific capacitance of 565 F g−1 (specific capacity of 126 mAh g−1) at a discharge current density of 0.8 A g−1 and a high specific capacity of 143 mAh g−1 at the scan rate of 20 mV s−1 in 0.5 M Na2SO4-0.5 M H2SO4 solution. In addition, the electrode material retains about 77% of the initial capacitance after 1000 cycles of charge-discharge at 8 A g−1. These results demonstrate that the special morphology and shorter diffusion pathways (SEM and EIS) make the binary composite a promising candidate for future energy storage applications. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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