Correlation between diffusion and kinetic behaviour of metal hydride battery: voltammetry and impedance analyses
The performance of metal hydride batteries depends on their electrochemical and kinetic behaviour, which varies with the state of charge (SoC). This study explores these characteristics in nickel-metal hydride batteries with A2B7 and AB5 electrodes, focusing on how SoC influences ion diffusion and...
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International Association of Physical Chemists (IAPC)
2025-04-01
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| Series: | Journal of Electrochemical Science and Engineering |
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| Online Access: | https://pub.iapchem.org/ojs/index.php/JESE/article/view/2655 |
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| author | Ika Dewi Wijayanti Delia Salsabila Putri Farhan Dzikriansyah Indra Sidharta Sutikno Sutikno |
| author_facet | Ika Dewi Wijayanti Delia Salsabila Putri Farhan Dzikriansyah Indra Sidharta Sutikno Sutikno |
| author_sort | Ika Dewi Wijayanti |
| collection | DOAJ |
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The performance of metal hydride batteries depends on their electrochemical and kinetic behaviour, which varies with the state of charge (SoC). This study explores these characteristics in nickel-metal hydride batteries with A2B7 and AB5 electrodes, focusing on how SoC influences ion diffusion and charge transfer kinetics of the batteries. Electro¬chemical impedance spectroscopy and cyclic voltammetry (CV) were used to analyse these behaviours, while X-ray diffraction provided structural insights and scanning electron microscopy proposed morphological concepts. Results reveal a positive correlation between SoC and both diffusion and kinetic behaviour. The value of fitting resistances decreases as SoC increases, reaching a minimum at 100 % SoC, where hydrogen diffusion is optimized. CV data supports this phenomenon, showing a more negative peak cathodic current (Ip,c) at higher SoC, indicating improved kinetics likely due to enhanced ion availability. Additionally, voltage window analysis showed maximum hydrogen storage at 100 % SoC for AB5 and 50 % for A2B7. Structurally, larger particle sizes and crystallites at higher SoC correlate with increased hydrogen desorption capacity. A2B7 exhibited superior diffusion kinetics, while AB5 demonstrated better discharge behaviour, highlighting how SoC-dependent diffusion and kinetics impact Ni-MH performance.
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| format | Article |
| id | doaj-art-4dd2ee72a2db4afa937d2cc87bc53105 |
| institution | DOAJ |
| issn | 1847-9286 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | International Association of Physical Chemists (IAPC) |
| record_format | Article |
| series | Journal of Electrochemical Science and Engineering |
| spelling | doaj-art-4dd2ee72a2db4afa937d2cc87bc531052025-08-20T03:13:38ZengInternational Association of Physical Chemists (IAPC)Journal of Electrochemical Science and Engineering1847-92862025-04-0110.5599/jese.2655Correlation between diffusion and kinetic behaviour of metal hydride battery: voltammetry and impedance analyses Ika Dewi Wijayanti0https://orcid.org/0000-0003-4482-4776Delia Salsabila Putri1https://orcid.org/0009-0007-9163-6838Farhan Dzikriansyah2https://orcid.org/0009-0008-4130-4058Indra Sidharta3https://orcid.org/0000-0001-6708-0381Sutikno Sutikno4https://orcid.org/0000-0002-5606-9061Department of Mechanical Engineering, ITS, Surabaya,60111, IndonesiaDepartment of Mechanical Engineering, ITS, Surabaya,60111, IndonesiaDepartment of Mechanical Engineering, ITS, Surabaya,60111, IndonesiaDepartment of Mechanical Engineering, ITS, Surabaya,60111, IndonesiaDepartment of Mechanical Engineering, ITS, Surabaya,60111, Indonesia The performance of metal hydride batteries depends on their electrochemical and kinetic behaviour, which varies with the state of charge (SoC). This study explores these characteristics in nickel-metal hydride batteries with A2B7 and AB5 electrodes, focusing on how SoC influences ion diffusion and charge transfer kinetics of the batteries. Electro¬chemical impedance spectroscopy and cyclic voltammetry (CV) were used to analyse these behaviours, while X-ray diffraction provided structural insights and scanning electron microscopy proposed morphological concepts. Results reveal a positive correlation between SoC and both diffusion and kinetic behaviour. The value of fitting resistances decreases as SoC increases, reaching a minimum at 100 % SoC, where hydrogen diffusion is optimized. CV data supports this phenomenon, showing a more negative peak cathodic current (Ip,c) at higher SoC, indicating improved kinetics likely due to enhanced ion availability. Additionally, voltage window analysis showed maximum hydrogen storage at 100 % SoC for AB5 and 50 % for A2B7. Structurally, larger particle sizes and crystallites at higher SoC correlate with increased hydrogen desorption capacity. A2B7 exhibited superior diffusion kinetics, while AB5 demonstrated better discharge behaviour, highlighting how SoC-dependent diffusion and kinetics impact Ni-MH performance. https://pub.iapchem.org/ojs/index.php/JESE/article/view/2655State of chargehydrogen storage alloysperformance analysisNyquist plotsvoltage window |
| spellingShingle | Ika Dewi Wijayanti Delia Salsabila Putri Farhan Dzikriansyah Indra Sidharta Sutikno Sutikno Correlation between diffusion and kinetic behaviour of metal hydride battery: voltammetry and impedance analyses Journal of Electrochemical Science and Engineering State of charge hydrogen storage alloys performance analysis Nyquist plots voltage window |
| title | Correlation between diffusion and kinetic behaviour of metal hydride battery: voltammetry and impedance analyses |
| title_full | Correlation between diffusion and kinetic behaviour of metal hydride battery: voltammetry and impedance analyses |
| title_fullStr | Correlation between diffusion and kinetic behaviour of metal hydride battery: voltammetry and impedance analyses |
| title_full_unstemmed | Correlation between diffusion and kinetic behaviour of metal hydride battery: voltammetry and impedance analyses |
| title_short | Correlation between diffusion and kinetic behaviour of metal hydride battery: voltammetry and impedance analyses |
| title_sort | correlation between diffusion and kinetic behaviour of metal hydride battery voltammetry and impedance analyses |
| topic | State of charge hydrogen storage alloys performance analysis Nyquist plots voltage window |
| url | https://pub.iapchem.org/ojs/index.php/JESE/article/view/2655 |
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