Electrochemical performance of the rare-earth perovskite-type oxide La0.6Sr0.4Co0.2Fe0.8O3 as negative electrode material for Ni/oxide rechargeable batteries
Abstract In this paper, the perovskite-type oxide La0.6Sr0.4Co0.2Fe0.8O3 was evaluated as a novel negative electrode material for Ni/oxide rechargeable batteries. The structure and morphology of the as-prepared powder was studied by scanning electron microscopy and X-ray diffraction. The electrochem...
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SpringerOpen
2017-08-01
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| Series: | Materials for Renewable and Sustainable Energy |
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| Online Access: | http://link.springer.com/article/10.1007/s40243-017-0100-x |
| _version_ | 1830479643335983104 |
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| author | John Henao Oscar Sotelo Maura Casales Lorenzo Martinez-Gomez |
| author_facet | John Henao Oscar Sotelo Maura Casales Lorenzo Martinez-Gomez |
| author_sort | John Henao |
| collection | DOAJ |
| description | Abstract In this paper, the perovskite-type oxide La0.6Sr0.4Co0.2Fe0.8O3 was evaluated as a novel negative electrode material for Ni/oxide rechargeable batteries. The structure and morphology of the as-prepared powder was studied by scanning electron microscopy and X-ray diffraction. The electrochemical performance of the perovskite-type oxide was investigated using chronopotentiometric, chronoamperometric and potentiodynamic polarization techniques. The maximum discharge capacity values of the perovskite-type electrodes were obtained during the first three cycles (51, 172 and 462 mAh g−1 at 298, 313 and 333 K, respectively). The maximum adsorption capability of hydrogen in the perovskite-type electrode was 1.72% wt. hydrogen at a current rate of 125 mA g−1, 333 K and 6 M KOH. The cycling ability was fairly good with 64% capacity conservation after 20 cycles at 333 K. The electrochemical evaluation was also performed using different electrolyte concentrations; interestingly, the maximum discharge capacity of the perovskite-type electrodes increased in a linear-like manner with the incremental changes in electrolyte concentration. The hydrogen diffusion coefficient and exchange current density were also estimated to discuss the kinetics of the process. |
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| institution | Directory Open Access Journal |
| issn | 2194-1459 2194-1467 |
| language | English |
| last_indexed | 2024-12-21T16:50:55Z |
| publishDate | 2017-08-01 |
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| spelling | doaj.art-c2b96e98249542ca9e999d8c71e287d62022-12-21T18:56:53ZengSpringerOpenMaterials for Renewable and Sustainable Energy2194-14592194-14672017-08-01641810.1007/s40243-017-0100-xElectrochemical performance of the rare-earth perovskite-type oxide La0.6Sr0.4Co0.2Fe0.8O3 as negative electrode material for Ni/oxide rechargeable batteriesJohn Henao0Oscar Sotelo1Maura Casales2Lorenzo Martinez-Gomez3Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México (UNAM)Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México (UNAM)Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México (UNAM)Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México (UNAM)Abstract In this paper, the perovskite-type oxide La0.6Sr0.4Co0.2Fe0.8O3 was evaluated as a novel negative electrode material for Ni/oxide rechargeable batteries. The structure and morphology of the as-prepared powder was studied by scanning electron microscopy and X-ray diffraction. The electrochemical performance of the perovskite-type oxide was investigated using chronopotentiometric, chronoamperometric and potentiodynamic polarization techniques. The maximum discharge capacity values of the perovskite-type electrodes were obtained during the first three cycles (51, 172 and 462 mAh g−1 at 298, 313 and 333 K, respectively). The maximum adsorption capability of hydrogen in the perovskite-type electrode was 1.72% wt. hydrogen at a current rate of 125 mA g−1, 333 K and 6 M KOH. The cycling ability was fairly good with 64% capacity conservation after 20 cycles at 333 K. The electrochemical evaluation was also performed using different electrolyte concentrations; interestingly, the maximum discharge capacity of the perovskite-type electrodes increased in a linear-like manner with the incremental changes in electrolyte concentration. The hydrogen diffusion coefficient and exchange current density were also estimated to discuss the kinetics of the process.http://link.springer.com/article/10.1007/s40243-017-0100-xRare earthsPerovskite-type oxidesHydrogen storageNi/MH batteriesElectrochemical performance |
| spellingShingle | John Henao Oscar Sotelo Maura Casales Lorenzo Martinez-Gomez Electrochemical performance of the rare-earth perovskite-type oxide La0.6Sr0.4Co0.2Fe0.8O3 as negative electrode material for Ni/oxide rechargeable batteries Materials for Renewable and Sustainable Energy Rare earths Perovskite-type oxides Hydrogen storage Ni/MH batteries Electrochemical performance |
| title | Electrochemical performance of the rare-earth perovskite-type oxide La0.6Sr0.4Co0.2Fe0.8O3 as negative electrode material for Ni/oxide rechargeable batteries |
| title_full | Electrochemical performance of the rare-earth perovskite-type oxide La0.6Sr0.4Co0.2Fe0.8O3 as negative electrode material for Ni/oxide rechargeable batteries |
| title_fullStr | Electrochemical performance of the rare-earth perovskite-type oxide La0.6Sr0.4Co0.2Fe0.8O3 as negative electrode material for Ni/oxide rechargeable batteries |
| title_full_unstemmed | Electrochemical performance of the rare-earth perovskite-type oxide La0.6Sr0.4Co0.2Fe0.8O3 as negative electrode material for Ni/oxide rechargeable batteries |
| title_short | Electrochemical performance of the rare-earth perovskite-type oxide La0.6Sr0.4Co0.2Fe0.8O3 as negative electrode material for Ni/oxide rechargeable batteries |
| title_sort | electrochemical performance of the rare earth perovskite type oxide la0 6sr0 4co0 2fe0 8o3 as negative electrode material for ni oxide rechargeable batteries |
| topic | Rare earths Perovskite-type oxides Hydrogen storage Ni/MH batteries Electrochemical performance |
| url | http://link.springer.com/article/10.1007/s40243-017-0100-x |
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