Volume 46, Issue 12 pp. 16823-16838
RESEARCH ARTICLE

KOH mediated hydrothermally synthesized hexagonal-CoMn2O4 for energy storage supercapacitor applications

Tholkappiyan Ramachandran

Tholkappiyan Ramachandran

Department of Mechanical and Aerospace Engineering, College of Engineering, United Arab Emirates University, Al-Ain, United Arab Emirates

National Water and Energy Center, United Arab Emirates University, Al Ain, United Arab Emirates

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Abdel-Hamid I. Mourad

Corresponding Author

Abdel-Hamid I. Mourad

Department of Mechanical and Aerospace Engineering, College of Engineering, United Arab Emirates University, Al-Ain, United Arab Emirates

National Water and Energy Center, United Arab Emirates University, Al Ain, United Arab Emirates

Mechanical Design Department, Faculty of Engineering, Helwan University, Cairo, Egypt

Correspondence

Abdel-Hamid I. Mourad, Department of Mechanical and Aerospace Engineering, College of Engineering, United Arab Emirates University, Al-Ain, P.O. Box. 15551, United Arab Emirates.

Email: [email protected]

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Ramesh Kumar Raji

Ramesh Kumar Raji

SSN Research Centre, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Tamil Nadu, India

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Ramachandran Krishnapriya

Ramachandran Krishnapriya

Department of Mechanical and Aerospace Engineering, College of Engineering, United Arab Emirates University, Al-Ain, United Arab Emirates

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Nizamudeen Cherupurakal

Nizamudeen Cherupurakal

Department of Mechanical and Aerospace Engineering, College of Engineering, United Arab Emirates University, Al-Ain, United Arab Emirates

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Abdul Subhan

Abdul Subhan

Department of Mechanical and Aerospace Engineering, College of Engineering, United Arab Emirates University, Al-Ain, United Arab Emirates

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Yarub Al-Douri

Yarub Al-Douri

Engineering Department, American University of Iraq-Sulaimani, Sulaimani, Kurdistan, Iraq

Department of Mechatronics Engineering, Faculty of Engineering and Natural Sciences, Bahcesehir University, Istanbul, Turkey

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First published: 02 July 2022
Citations: 46

Funding information: United Arab Emirates University, Grant/Award Numbers: 12R015, 31R238

Summary

In recent years, there has been much focus on how the structure and morphology of CoMn2O4 materials influence their electrochemical performance. Herein we introduce a KOH-surfactant agent to form a hexagonal like-CoMn2O4 via hydrothermal. The X-ray Rietveld refinement evidenced that spinel CoMn2O4 with the tetragonal structured I 41/amd phase. Further, the chemical environment of this phase is identified using various techniques. Surface morphology studies revealed hexagonal-like features. Owing to its features, the material delivers an excellent capacitance of 638.8 F/g. CoMn2O4 also shows attained columbic efficiency of 81% and retains a capacitance of 85% after 4000 charge-discharge cycles. The excellent cyclic stability and high performance are achieved due to the more active sites and convenient electronic transference route for the ions through an electrochemical process. The symmetrical two-electrode assembly has also been fabricated. Hence, we believed that the surfactant-KOH mediated hexagonal-like-CoMn2O4 material should enhance the supercapacitor properties.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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