Fabrication of Bimetallic Oxides (MCo 2 O 4: M=Cu, Mn) on Ordered Microchannel Electro-Conductive Plate for High-Performance Hybrid Supercapacitors

Mai Li, Zheyi Meng, Ruichao Feng, Kailan Zhu, Fengfeng Zhao, Chunrui Wang, Jiale Wang, Lianwei Wang and Paul K. Chu
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Mai Li: College of Science, Donghua University, Shanghai 201620, China
Zheyi Meng: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science, Donghua University, Shanghai 201620, China
Ruichao Feng: College of Mathematics and Physics, Shanghai University of Electric Power, Shanghai 200090, China
Kailan Zhu: College of Science, Donghua University, Shanghai 201620, China
Fengfeng Zhao: College of Mathematics and Physics, Shanghai University of Electric Power, Shanghai 200090, China
Chunrui Wang: College of Science, Donghua University, Shanghai 201620, China
Jiale Wang: College of Science, Donghua University, Shanghai 201620, China
Lianwei Wang: Key Laboratory of Polar Materials and Devices (MOE), Department of Electronics, East China Normal University, Shanghai 200241, China
Paul K. Chu: Department of Physics, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China

Sustainability, 2021, vol. 13, issue 17, 1-14

Abstract: AB 2 O 4 -type binary-transition metal oxides (BTMOs) of CuCo 2 O 4 and MnCo 2 O 4 were successfully prepared on ordered macroporous electrode plates (OMEP) for supercapacitors. Under the current density of 5 mA cm −2 , the CuCo 2 O 4 /OMEP electrode achieved a specific capacitance of 1199 F g −1 . The asymmetric supercapacitor device prepared using CuCo 2 O 4 /OMEP as the positive electrode and carbon-based materials as the negative electrode (CuCo 2 O 4 /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 CuCo 2 O 4 /OMEP//AC is only 7.5% (the retention is 92.5%). The MnCo 2 O 4 /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 MnCo 2 O 4 /OMEP-based supercapacitor device (MnCo 2 O 4 /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.

Keywords: power buffer; silicon micromachining; bimetallic oxide; ordered macropore structure; electrochemical; supercapacitor (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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