Efficient Recovery Annealing of the Pseudocapacitive Electrode with a High Loading of Cobalt Oxide Nanoparticles for Hybrid Supercapacitor Applications
Electrochemical pseudocapacitors, along with batteries, are the essential components of today’s highly efficient energy storage systems. Cobalt oxide is widely developing for hybrid supercapacitor pseudocapacitance electrode applications due to its wide range of redox reactions, high theoretical cap...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/20/3669 |
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| author | Khabibulla A. Abdullin Maratbek T. Gabdullin Zhanar K. Kalkozova Shyryn T. Nurbolat Mojtaba Mirzaeian |
| author_facet | Khabibulla A. Abdullin Maratbek T. Gabdullin Zhanar K. Kalkozova Shyryn T. Nurbolat Mojtaba Mirzaeian |
| author_sort | Khabibulla A. Abdullin |
| collection | DOAJ |
| description | Electrochemical pseudocapacitors, along with batteries, are the essential components of today’s highly efficient energy storage systems. Cobalt oxide is widely developing for hybrid supercapacitor pseudocapacitance electrode applications due to its wide range of redox reactions, high theoretical capacitance, low cost, and presence of electrical conductivity. In this work, a recovery annealing approach is proposed to modify the electrochemical properties of Co<sub>3</sub>O<sub>4</sub> pseudocapacitive electrodes. Cyclic voltammetry measurements indicate a predominance of surface-controlled redox reactions as a result of recovery annealing. X-ray diffraction, Raman spectra, and XPES results showed that due to the small size of cobalt oxide particles, low-temperature recovery causes the transformation of the Co<sub>3</sub>O<sub>4</sub> nanocrystalline phase into the CoO phase. For the same reason, a rapid reverse transformation of CoO into Co<sub>3</sub>O<sub>4</sub> occurs during in situ oxidation. This recrystallization enhances the electrochemical activity of the surface of nanoparticles, where a high concentration of oxygen vacancies is observed in the resulting Co<sub>3</sub>O<sub>4</sub> phase. Thus, a simple method of modifying nanocrystalline Co<sub>3</sub>O<sub>4</sub> electrodes provides much-improved pseudocapacitance characteristics. |
| first_indexed | 2024-03-09T19:40:37Z |
| format | Article |
| id | doaj.art-9ce4bc0a9ec34ccca915c6596d69fc8f |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T19:40:37Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-9ce4bc0a9ec34ccca915c6596d69fc8f2023-11-24T01:41:33ZengMDPI AGNanomaterials2079-49912022-10-011220366910.3390/nano12203669Efficient Recovery Annealing of the Pseudocapacitive Electrode with a High Loading of Cobalt Oxide Nanoparticles for Hybrid Supercapacitor ApplicationsKhabibulla A. Abdullin0Maratbek T. Gabdullin1Zhanar K. Kalkozova2Shyryn T. Nurbolat3Mojtaba Mirzaeian4National Nanotechnology Laboratory of Open Type (NNLOT), Al-Farabi Kazakh National University, Al-Farabi Avenue 71, Almaty 050012, KazakhstanResearch Center of Renewable Energy and Nanotechnology, Kazakh-British Technical University, Tole bi st. 59, Almaty 050000, KazakhstanNational Nanotechnology Laboratory of Open Type (NNLOT), Al-Farabi Kazakh National University, Al-Farabi Avenue 71, Almaty 050012, KazakhstanNational Nanotechnology Laboratory of Open Type (NNLOT), Al-Farabi Kazakh National University, Al-Farabi Avenue 71, Almaty 050012, KazakhstanSchool of Computing, Engineering and Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, UKElectrochemical pseudocapacitors, along with batteries, are the essential components of today’s highly efficient energy storage systems. Cobalt oxide is widely developing for hybrid supercapacitor pseudocapacitance electrode applications due to its wide range of redox reactions, high theoretical capacitance, low cost, and presence of electrical conductivity. In this work, a recovery annealing approach is proposed to modify the electrochemical properties of Co<sub>3</sub>O<sub>4</sub> pseudocapacitive electrodes. Cyclic voltammetry measurements indicate a predominance of surface-controlled redox reactions as a result of recovery annealing. X-ray diffraction, Raman spectra, and XPES results showed that due to the small size of cobalt oxide particles, low-temperature recovery causes the transformation of the Co<sub>3</sub>O<sub>4</sub> nanocrystalline phase into the CoO phase. For the same reason, a rapid reverse transformation of CoO into Co<sub>3</sub>O<sub>4</sub> occurs during in situ oxidation. This recrystallization enhances the electrochemical activity of the surface of nanoparticles, where a high concentration of oxygen vacancies is observed in the resulting Co<sub>3</sub>O<sub>4</sub> phase. Thus, a simple method of modifying nanocrystalline Co<sub>3</sub>O<sub>4</sub> electrodes provides much-improved pseudocapacitance characteristics.https://www.mdpi.com/2079-4991/12/20/3669supercapacitorselectrode materialshybrid capacitorsenergy storage devices |
| spellingShingle | Khabibulla A. Abdullin Maratbek T. Gabdullin Zhanar K. Kalkozova Shyryn T. Nurbolat Mojtaba Mirzaeian Efficient Recovery Annealing of the Pseudocapacitive Electrode with a High Loading of Cobalt Oxide Nanoparticles for Hybrid Supercapacitor Applications Nanomaterials supercapacitors electrode materials hybrid capacitors energy storage devices |
| title | Efficient Recovery Annealing of the Pseudocapacitive Electrode with a High Loading of Cobalt Oxide Nanoparticles for Hybrid Supercapacitor Applications |
| title_full | Efficient Recovery Annealing of the Pseudocapacitive Electrode with a High Loading of Cobalt Oxide Nanoparticles for Hybrid Supercapacitor Applications |
| title_fullStr | Efficient Recovery Annealing of the Pseudocapacitive Electrode with a High Loading of Cobalt Oxide Nanoparticles for Hybrid Supercapacitor Applications |
| title_full_unstemmed | Efficient Recovery Annealing of the Pseudocapacitive Electrode with a High Loading of Cobalt Oxide Nanoparticles for Hybrid Supercapacitor Applications |
| title_short | Efficient Recovery Annealing of the Pseudocapacitive Electrode with a High Loading of Cobalt Oxide Nanoparticles for Hybrid Supercapacitor Applications |
| title_sort | efficient recovery annealing of the pseudocapacitive electrode with a high loading of cobalt oxide nanoparticles for hybrid supercapacitor applications |
| topic | supercapacitors electrode materials hybrid capacitors energy storage devices |
| url | https://www.mdpi.com/2079-4991/12/20/3669 |
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