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Micromachines
Volume 16
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10.3390/mi16010007
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Article

Design and Fabrication of MoCuOx Bimetallic Oxide Electrodes for High-Performance Micro-Supercapacitor by Electro-Spark Machining

by
Ri Chen
1,
Siqi Lv
1,
Yunying Xu
2,
Zicong Lin
1,
Guoying Zhang
1,
Jian Wang
1,
Bocheng Wang
1,*,
Wenxia Wang
3,
Igor Zhitomirsky
4 and
Yong Yang
1,*
1
Department of Mechatronic Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China
2
School of Education, Guangdong Polytechnic Normal University, Guangzhou 510665, China
3
Department of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
4
School of Materials Science and Engineering, McMaster University, Hamilton, ON L8S 4L7, Canada
*
Authors to whom correspondence should be addressed.
Micromachines 2025, 16(1), 7; https://doi.org/10.3390/mi16010007
Submission received: 24 November 2024 / Revised: 23 December 2024 / Accepted: 23 December 2024 / Published: 25 December 2024
(This article belongs to the Special Issue Advanced Micro- and Nano-Manufacturing Technologies, 2nd Edition)
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Abstract

Transition metal oxides, distinguished by their high theoretical specific capacitance values, inexpensive cost, and low toxicity, have been extensively utilized as electrode materials for high-performance supercapacitors. Nevertheless, their conductivity is generally insufficient to facilitate rapid electron transport at high rates. Therefore, research on bimetallic oxide electrode materials has become a hot spot, especially in the field of micro-supercapacitors (MSC). Hence, this study presents the preparation of bimetallic oxide electrode materials via electro-spark machining (EM), which is efficient, convenient, green and non-polluting, as well as customizable. The fabricated copper-molybdenum bimetallic oxide (MoCuOx) device showed good electrochemical performance under the electrode system. It provided a high areal capacity of 50.2 mF cm−2 (scan rate: 2 mV s−1) with outstanding cycling retention of 94.9% even after 2000 cycles. This work opens a new window for fabricating bimetallic oxide materials in an efficient, environmental and customizable way for various electronics applications.
Keywords: bimetallic oxides electrode; electro-spark machining (EM); copper-molybdenum bimetallic oxide (MoCuOx); micro-supercapacitor (MSC) bimetallic oxides electrode; electro-spark machining (EM); copper-molybdenum bimetallic oxide (MoCuOx); micro-supercapacitor (MSC)

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MDPI and ACS Style

Chen, R.; Lv, S.; Xu, Y.; Lin, Z.; Zhang, G.; Wang, J.; Wang, B.; Wang, W.; Zhitomirsky, I.; Yang, Y. Design and Fabrication of MoCuOx Bimetallic Oxide Electrodes for High-Performance Micro-Supercapacitor by Electro-Spark Machining. Micromachines 2025, 16, 7. https://doi.org/10.3390/mi16010007

AMA Style

Chen R, Lv S, Xu Y, Lin Z, Zhang G, Wang J, Wang B, Wang W, Zhitomirsky I, Yang Y. Design and Fabrication of MoCuOx Bimetallic Oxide Electrodes for High-Performance Micro-Supercapacitor by Electro-Spark Machining. Micromachines. 2025; 16(1):7. https://doi.org/10.3390/mi16010007

Chicago/Turabian Style

Chen, Ri, Siqi Lv, Yunying Xu, Zicong Lin, Guoying Zhang, Jian Wang, Bocheng Wang, Wenxia Wang, Igor Zhitomirsky, and Yong Yang. 2025. "Design and Fabrication of MoCuOx Bimetallic Oxide Electrodes for High-Performance Micro-Supercapacitor by Electro-Spark Machining" Micromachines 16, no. 1: 7. https://doi.org/10.3390/mi16010007

APA Style

Chen, R., Lv, S., Xu, Y., Lin, Z., Zhang, G., Wang, J., Wang, B., Wang, W., Zhitomirsky, I., & Yang, Y. (2025). Design and Fabrication of MoCuOx Bimetallic Oxide Electrodes for High-Performance Micro-Supercapacitor by Electro-Spark Machining. Micromachines, 16(1), 7. https://doi.org/10.3390/mi16010007

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