Failure Mechanisms of Nickel/Metal Hydride Batteries with Cobalt-Substituted Superlattice Hydrogen-Absorbing Alloy Anodes at 50 °C
The incorporation of a small amount of Co in the A2B7 superlattice hydrogen absorbing alloy (HAA) can benefit its electrochemical cycle life performance at both room temperature (RT) and 50 °C. The electrochemical properties of the Co-substituted A2B7 and the failure mechanisms of cells using such a...
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| Format: | Article |
| Language: | English |
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MDPI AG
2016-06-01
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| Series: | Batteries |
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| Online Access: | http://www.mdpi.com/2313-0105/2/3/20 |
| _version_ | 1819260742534168576 |
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| author | Tiejun Meng Kwo-hsiung Young John Koch Taihei Ouchi Shigekazu Yasuoka |
| author_facet | Tiejun Meng Kwo-hsiung Young John Koch Taihei Ouchi Shigekazu Yasuoka |
| author_sort | Tiejun Meng |
| collection | DOAJ |
| description | The incorporation of a small amount of Co in the A2B7 superlattice hydrogen absorbing alloy (HAA) can benefit its electrochemical cycle life performance at both room temperature (RT) and 50 °C. The electrochemical properties of the Co-substituted A2B7 and the failure mechanisms of cells using such alloys cycled at RT have been reported previously. In this paper, the failure mechanisms of the same alloys cycled at 50 °C are reported. Compared to that at RT, the trend of the cycle life at 50 °C versus the Co content in the Co-substituted A2B7 HAAs is similar, but the cycle life is significantly shorter. Failure analysis of the cells at 50 °C was performed using X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (EDS), and inductively coupled plasma (ICP) analysis. It was found that the elevated temperature accelerates electrolyte dry-out and the deterioration (both pulverization and oxidation) of the A2B7 negative electrode, which are major causes of cell failure when cycling at 50 °C. Cells from HAA with higher Co-content also showed micro-shortage in the separator from the debris of the corrosion of the negative electrode. |
| first_indexed | 2024-12-23T19:30:44Z |
| format | Article |
| id | doaj.art-b17bc46b8b354d4aad74be0505bd688c |
| institution | Directory Open Access Journal |
| issn | 2313-0105 |
| language | English |
| last_indexed | 2024-12-23T19:30:44Z |
| publishDate | 2016-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Batteries |
| spelling | doaj.art-b17bc46b8b354d4aad74be0505bd688c2022-12-21T17:33:55ZengMDPI AGBatteries2313-01052016-06-01232010.3390/batteries2030020batteries2030020Failure Mechanisms of Nickel/Metal Hydride Batteries with Cobalt-Substituted Superlattice Hydrogen-Absorbing Alloy Anodes at 50 °CTiejun Meng0Kwo-hsiung Young1John Koch2Taihei Ouchi3Shigekazu Yasuoka4BASF/Battery Materials-Ovonic, 2983 Waterview Drive, Rochester Hills, MI 48309, USABASF/Battery Materials-Ovonic, 2983 Waterview Drive, Rochester Hills, MI 48309, USABASF/Battery Materials-Ovonic, 2983 Waterview Drive, Rochester Hills, MI 48309, USABASF/Battery Materials-Ovonic, 2983 Waterview Drive, Rochester Hills, MI 48309, USAFDK Corporation, 307-2 Koyagimachi, Takasaki 370-0071, Gunma, JapanThe incorporation of a small amount of Co in the A2B7 superlattice hydrogen absorbing alloy (HAA) can benefit its electrochemical cycle life performance at both room temperature (RT) and 50 °C. The electrochemical properties of the Co-substituted A2B7 and the failure mechanisms of cells using such alloys cycled at RT have been reported previously. In this paper, the failure mechanisms of the same alloys cycled at 50 °C are reported. Compared to that at RT, the trend of the cycle life at 50 °C versus the Co content in the Co-substituted A2B7 HAAs is similar, but the cycle life is significantly shorter. Failure analysis of the cells at 50 °C was performed using X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (EDS), and inductively coupled plasma (ICP) analysis. It was found that the elevated temperature accelerates electrolyte dry-out and the deterioration (both pulverization and oxidation) of the A2B7 negative electrode, which are major causes of cell failure when cycling at 50 °C. Cells from HAA with higher Co-content also showed micro-shortage in the separator from the debris of the corrosion of the negative electrode.http://www.mdpi.com/2313-0105/2/3/20nickel metal hydride batteryhydrogen storage alloysfailure analysisscanning electron microscopy (SEM)metal corrosionhigh temperature degradation |
| spellingShingle | Tiejun Meng Kwo-hsiung Young John Koch Taihei Ouchi Shigekazu Yasuoka Failure Mechanisms of Nickel/Metal Hydride Batteries with Cobalt-Substituted Superlattice Hydrogen-Absorbing Alloy Anodes at 50 °C Batteries nickel metal hydride battery hydrogen storage alloys failure analysis scanning electron microscopy (SEM) metal corrosion high temperature degradation |
| title | Failure Mechanisms of Nickel/Metal Hydride Batteries with Cobalt-Substituted Superlattice Hydrogen-Absorbing Alloy Anodes at 50 °C |
| title_full | Failure Mechanisms of Nickel/Metal Hydride Batteries with Cobalt-Substituted Superlattice Hydrogen-Absorbing Alloy Anodes at 50 °C |
| title_fullStr | Failure Mechanisms of Nickel/Metal Hydride Batteries with Cobalt-Substituted Superlattice Hydrogen-Absorbing Alloy Anodes at 50 °C |
| title_full_unstemmed | Failure Mechanisms of Nickel/Metal Hydride Batteries with Cobalt-Substituted Superlattice Hydrogen-Absorbing Alloy Anodes at 50 °C |
| title_short | Failure Mechanisms of Nickel/Metal Hydride Batteries with Cobalt-Substituted Superlattice Hydrogen-Absorbing Alloy Anodes at 50 °C |
| title_sort | failure mechanisms of nickel metal hydride batteries with cobalt substituted superlattice hydrogen absorbing alloy anodes at 50 °c |
| topic | nickel metal hydride battery hydrogen storage alloys failure analysis scanning electron microscopy (SEM) metal corrosion high temperature degradation |
| url | http://www.mdpi.com/2313-0105/2/3/20 |
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