Electrochemical Analysis of MnO2 (α, β, and γ)-Based Electrode for High-Performance Supercapacitor Application
-
Published:2023-07-05
Issue:13
Volume:13
Page:7907
-
ISSN:2076-3417
-
Container-title:Applied Sciences
-
language:en
-
Short-container-title:Applied Sciences
Author:
Devi Raman1, Kumar Vinay1ORCID, Kumar Sunil1, Bulla Mamta1, Sharma Shruti2, Sharma Ashutosh3ORCID
Affiliation:
1. Department of Physics, COBS&H, CCS Haryana Agricultural University, Hisar 125004, India 2. Department of Electrical and Computer Engineering, Ajou University, Suwon 16499, Republic of Korea 3. Department of Materials Science and Engineering, Ajou University, Suwon 16499, Republic of Korea
Abstract
MnO2 is the most favorable material in power storage due to its technological significance and potential applications in pseudocapacitance (due to various oxidative states allowing efficient charge transfer to meet energy demands), where its properties are considerably influenced by its structure and surface morphology. In the present study, a facile hydrothermal route was used to produce different phases of MnO2 (α, β, and γ) with different morphologies. The electrochemical performance of the synthesized phases was studied in aqueous sodium sulfate as an electrolyte. X-ray diffraction, UV–Vis spectroscopy, and Fourier-transform infrared spectroscopy were used to characterize the synthesized material. The surface morphology and topography were examined using field-emission scanning electron microscopy. The direct band gap of α-, β-, and γ-MnO2 was found to be 1.86 eV, 1.08 eV, and 1.68 eV, lying in the semiconducting range, further enhancing the electrochemical performance. It was found that α-MnO2 had a maximum specific capacitance of 138 F/g at 1 A/g, and the symmetric device fabricated using α-MnO2 had a specific capacitance of 86 F/g at 1 A/g.
Subject
Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science
Reference32 articles.
1. Morphology and Electrochemical Properties of α-, β-, γ-, and δ-MnO2 Synthesized by Redox Method;Musil;J. Electrochem. Soc.,2015 2. Su, X., Liang, Z., He, Q., Guo, Y., Luo, G., Han, S., and Yu, L. (2022). Advanced three-dimensional hierarchical porous α-MnO2 nanowires network toward enhanced supercapacitive performance. Nanotechnology. 3. Synergistic effect from Ni2+ ions with SnS for all solid-state type symmetric supercapacitor;Modi;J. Energy Storage,2023 4. Rani, P., Dahiya, R., Bulla, M., Devi, R., Jeet, K., Jatrana, A., and Kumar, V. (2023). Hydrothermal-assisted green synthesis of reduced graphene oxide nanosheets (rGO) using lemon (Citrus Limon) peel extract. Mater. Today Proc., in press. 5. Development of biochar-based functional materials for electrochemical supercapacitor applications;Devi;ECS Trans.,2022
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|