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- Title
Fabrication of Bimetallic Oxides (MCo 2 O 4 : M=Cu, Mn) on Ordered Microchannel Electro-Conductive Plate for High-Performance Hybrid Supercapacitors.
- Authors
Li, Mai; Meng, Zheyi; Feng, Ruichao; Zhu, Kailan; Zhao, Fengfeng; Wang, Chunrui; Wang, Jiale; Wang, Lianwei; Chu, Paul K.
- Abstract
AB2O4-type binary-transition metal oxides (BTMOs) of CuCo2O4 and MnCo2O4 were successfully prepared on ordered macroporous electrode plates (OMEP) for supercapacitors. Under the current density of 5 mA cm−2, the CuCo2O4/OMEP electrode achieved a specific capacitance of 1199 F g−1. The asymmetric supercapacitor device prepared using CuCo2O4/OMEP as the positive electrode and carbon-based materials as the negative electrode (CuCo2O4/OMEP//AC) achieved the power density of 14.58 kW kg−1 under the energy density of 11.7 Wh kg−1. After 10,000 GCD cycles, the loss capacitance of CuCo2O4/OMEP//AC is only 7.5% (the retention is 92.5%). The MnCo2O4/OMEP electrode shows the specific and area capacitance of 843 F g−1 and 5.39 F cm−2 at 5 mA cm−2. The MnCo2O4/OMEP-based supercapacitor device (MnCo2O4/OMEP//AC) has a power density of 8.33 kW kg−1 under the energy density of 11.6 Wh kg−1 and the cycle stability was 90.2% after 10,000 cycles. The excellent power density and cycle stability prove that the prepared hybrid supercapacitor fabricated under silicon process has a good prospect as the power buffer device for solar cells.
- Subjects
SUPERCAPACITOR electrodes; MICROCHANNEL plates; SUPERCAPACITORS; ENERGY density; NEGATIVE electrode; POWER density; METALLIC oxides
- Publication
Sustainability (2071-1050), 2021, Vol 13, Issue 17, p9896
- ISSN
2071-1050
- Publication type
Article
- DOI
10.3390/su13179896