Effect of the nanometric LiFePO4 on the hydrogen storage properties of MgH2
A nanometric phosphoric complex salt additive was synthesized by hydrothermal method. Its catalytic effect on the hydrogen storage properties of MgH2 was investigated. MgH2+20 wt.% LiFePO4 obtained by ball-milling process had an ability of absorbing 2.03 wt.% hydrogen at 423 K in 21 min, and only 0....
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier Ltd
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/52079 |
| _version_ | 1848758840278908928 |
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| author | Cheng, Y. Zhang, W. Liu, Jian Cheng, K. Zhao, Z. |
| author_facet | Cheng, Y. Zhang, W. Liu, Jian Cheng, K. Zhao, Z. |
| author_sort | Cheng, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | A nanometric phosphoric complex salt additive was synthesized by hydrothermal method. Its catalytic effect on the hydrogen storage properties of MgH2 was investigated. MgH2+20 wt.% LiFePO4 obtained by ball-milling process had an ability of absorbing 2.03 wt.% hydrogen at 423 K in 21 min, and only 0.98 wt.% could be absorbed by MgH2 for the identical condition. 3.61 wt.% hydrogen could be released by the composite at 623 K in 21 min, whereas only 2.23 wt.% was desorbed by as-received MgH2. Doping by nanometric LiFePO4 expressively enhanced the hydrogenation/dehydrogenation properties of MgH2, and changed the rate-controlling steps from three-dimensional interfacial reaction to one-dimensional diffusion process. Meanwhile, the onset dehydrogenation temperature for MgH2+20 wt.% LiFePO4 was 653 K, which was found to be 60 K lower than the as-received MgH2. In addition, the addition of LiFePO4 also lowered the activation energy (Ea) 31 kJ mol-1. Based on XRD and XPS analysis, the in situ formed phases LiMgPO4 and Fe, which are produced by the reaction between MgH2 and LiFePO4, may be responsible for the remarkable improvement in hydrogen storage properties of MgH2. |
| first_indexed | 2025-11-14T09:50:23Z |
| format | Journal Article |
| id | curtin-20.500.11937-52079 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:50:23Z |
| publishDate | 2017 |
| publisher | Elsevier Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-520792017-10-06T07:40:53Z Effect of the nanometric LiFePO4 on the hydrogen storage properties of MgH2 Cheng, Y. Zhang, W. Liu, Jian Cheng, K. Zhao, Z. A nanometric phosphoric complex salt additive was synthesized by hydrothermal method. Its catalytic effect on the hydrogen storage properties of MgH2 was investigated. MgH2+20 wt.% LiFePO4 obtained by ball-milling process had an ability of absorbing 2.03 wt.% hydrogen at 423 K in 21 min, and only 0.98 wt.% could be absorbed by MgH2 for the identical condition. 3.61 wt.% hydrogen could be released by the composite at 623 K in 21 min, whereas only 2.23 wt.% was desorbed by as-received MgH2. Doping by nanometric LiFePO4 expressively enhanced the hydrogenation/dehydrogenation properties of MgH2, and changed the rate-controlling steps from three-dimensional interfacial reaction to one-dimensional diffusion process. Meanwhile, the onset dehydrogenation temperature for MgH2+20 wt.% LiFePO4 was 653 K, which was found to be 60 K lower than the as-received MgH2. In addition, the addition of LiFePO4 also lowered the activation energy (Ea) 31 kJ mol-1. Based on XRD and XPS analysis, the in situ formed phases LiMgPO4 and Fe, which are produced by the reaction between MgH2 and LiFePO4, may be responsible for the remarkable improvement in hydrogen storage properties of MgH2. 2017 Journal Article http://hdl.handle.net/20.500.11937/52079 10.1016/j.ijhydene.2016.10.084 Elsevier Ltd restricted |
| spellingShingle | Cheng, Y. Zhang, W. Liu, Jian Cheng, K. Zhao, Z. Effect of the nanometric LiFePO4 on the hydrogen storage properties of MgH2 |
| title | Effect of the nanometric LiFePO4 on the hydrogen storage properties of MgH2 |
| title_full | Effect of the nanometric LiFePO4 on the hydrogen storage properties of MgH2 |
| title_fullStr | Effect of the nanometric LiFePO4 on the hydrogen storage properties of MgH2 |
| title_full_unstemmed | Effect of the nanometric LiFePO4 on the hydrogen storage properties of MgH2 |
| title_short | Effect of the nanometric LiFePO4 on the hydrogen storage properties of MgH2 |
| title_sort | effect of the nanometric lifepo4 on the hydrogen storage properties of mgh2 |
| url | http://hdl.handle.net/20.500.11937/52079 |