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|
| Type |
Poster Presentation |
| Area |
Electrochemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
ELEC.P-602 |
| Subject |
Enhancement in energy density of asymmetric supercapacitor electrodes
based on MnO2 and Fe2O3 nanoparticles
|
| Authors |
Haein Lee, Sanggyu Yim1,*
Kookmin University, Korea
1Department of Applied Chemistry, Kookmin University, Korea
|
| Abstract |
Transition metal oxides (TMOs) are one of the most attractive electrode materials for pseudocapacitors due to their high specific capacitance with faradaic redox reactions, low cost and environmentally friendly characteristics. However, due to their poor electrical conductivity, the TMOs-based electrode should be nanostructured in order to increase its surface area and hence facilitate charge transport between the electrode and electrolyte. Furthermore, low energy density of the TMOs-based electrodes still limits many applications requiring long duration. Since the energy density, E, is strongly dependent on the operating voltage, V, as well as the device capacitance, C, according to the equation, E = 0.5 CspV2, it is important to extend the operating voltage window in order to improve the energy density of the device. In this context, we fabricated asymmetric supercapacitor electrodes based on two types of metal oxide nanoparticles, i.e. manganese oxide (MnO2) and iron oxide (Fe2O3) nanoparticle, with different operating voltage window. Since the Fe2O3 and MnO2 electrode operate at negative and positive voltage range, respectively, the asymmetric combination of the two electrodes is expected to extend the operating voltage and hence increase the energy density of the devices. Other capacitive properties such as voltammetric response and cycle life of the electrodes are also investigated |
| E-mail |
syuka4@naver.com |
|
121st General Meeting of the KCS