Investigation on the Structure and Electrochemical Properties of La-Ce-Mg-Al-Ni Hydrogen Storage Alloy
Structure and electrochemical characteristics of La0.96Ce0.04Mg0.15Al0.05Ni2.8 hydrogen storage alloy have been investigated. X-ray diffraction analyses reveal that the La0.96Ce0.04Mg0.15Al0.05Ni2.8 hydrogen storage alloy consisted of a (La, Mg)Ni3 phase with the rhombohedral PuNi3-type structure an...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2013/627582 |
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| author | Yuqing Qiao Jianyi Xi Minshou Zhao Guangjie Shao Yongchun Luo Limin Wang |
| author_facet | Yuqing Qiao Jianyi Xi Minshou Zhao Guangjie Shao Yongchun Luo Limin Wang |
| author_sort | Yuqing Qiao |
| collection | DOAJ |
| description | Structure and electrochemical characteristics of La0.96Ce0.04Mg0.15Al0.05Ni2.8 hydrogen storage alloy have been investigated. X-ray diffraction analyses reveal that the La0.96Ce0.04Mg0.15Al0.05Ni2.8 hydrogen storage alloy consisted of a (La, Mg)Ni3 phase with the rhombohedral PuNi3-type structure and a LaNi5 phase with the hexagonal CaCu5-type structure. TEM shows that the alloy is multicrystal with a lattice space 0.187 nm. EDS analyse shows that the content of Mg is 3.48% (atom) which coincide well with the designed composition of the electrode alloy. Electrochemical investigations show that the maximum discharge capacity of the alloy electrode is 325 mAh g−1. The alloy electrode has higher discharge capacity within the discharge current density span from 60 mA g−1 to 300 mA g−1. Electrochemical impedance spectroscopy measurements indicate that the charge transfer resistance RT on the alloy electrode surface and the calculated exchange current density I0 are 0.135 Ω and 1298 mA g−1, respectively; the better eletrochemical reaction kinetic of the alloy electrode may be responsible for the better high-rate dischargeability. |
| format | Article |
| id | doaj-art-73b1d05139da4c79a2b9b3866fa745e6 |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-73b1d05139da4c79a2b9b3866fa745e62025-02-03T01:29:04ZengWileyJournal of Chemistry2090-90632090-90712013-01-01201310.1155/2013/627582627582Investigation on the Structure and Electrochemical Properties of La-Ce-Mg-Al-Ni Hydrogen Storage AlloyYuqing Qiao0Jianyi Xi1Minshou Zhao2Guangjie Shao3Yongchun Luo4Limin Wang5State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, CAS, Changchun 130022, ChinaCollege of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, ChinaCollege of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, ChinaCollege of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, ChinaDepartment of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, ChinaState Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, CAS, Changchun 130022, ChinaStructure and electrochemical characteristics of La0.96Ce0.04Mg0.15Al0.05Ni2.8 hydrogen storage alloy have been investigated. X-ray diffraction analyses reveal that the La0.96Ce0.04Mg0.15Al0.05Ni2.8 hydrogen storage alloy consisted of a (La, Mg)Ni3 phase with the rhombohedral PuNi3-type structure and a LaNi5 phase with the hexagonal CaCu5-type structure. TEM shows that the alloy is multicrystal with a lattice space 0.187 nm. EDS analyse shows that the content of Mg is 3.48% (atom) which coincide well with the designed composition of the electrode alloy. Electrochemical investigations show that the maximum discharge capacity of the alloy electrode is 325 mAh g−1. The alloy electrode has higher discharge capacity within the discharge current density span from 60 mA g−1 to 300 mA g−1. Electrochemical impedance spectroscopy measurements indicate that the charge transfer resistance RT on the alloy electrode surface and the calculated exchange current density I0 are 0.135 Ω and 1298 mA g−1, respectively; the better eletrochemical reaction kinetic of the alloy electrode may be responsible for the better high-rate dischargeability.http://dx.doi.org/10.1155/2013/627582 |
| spellingShingle | Yuqing Qiao Jianyi Xi Minshou Zhao Guangjie Shao Yongchun Luo Limin Wang Investigation on the Structure and Electrochemical Properties of La-Ce-Mg-Al-Ni Hydrogen Storage Alloy Journal of Chemistry |
| title | Investigation on the Structure and Electrochemical Properties of La-Ce-Mg-Al-Ni Hydrogen Storage Alloy |
| title_full | Investigation on the Structure and Electrochemical Properties of La-Ce-Mg-Al-Ni Hydrogen Storage Alloy |
| title_fullStr | Investigation on the Structure and Electrochemical Properties of La-Ce-Mg-Al-Ni Hydrogen Storage Alloy |
| title_full_unstemmed | Investigation on the Structure and Electrochemical Properties of La-Ce-Mg-Al-Ni Hydrogen Storage Alloy |
| title_short | Investigation on the Structure and Electrochemical Properties of La-Ce-Mg-Al-Ni Hydrogen Storage Alloy |
| title_sort | investigation on the structure and electrochemical properties of la ce mg al ni hydrogen storage alloy |
| url | http://dx.doi.org/10.1155/2013/627582 |
| work_keys_str_mv | AT yuqingqiao investigationonthestructureandelectrochemicalpropertiesoflacemgalnihydrogenstoragealloy AT jianyixi investigationonthestructureandelectrochemicalpropertiesoflacemgalnihydrogenstoragealloy AT minshouzhao investigationonthestructureandelectrochemicalpropertiesoflacemgalnihydrogenstoragealloy AT guangjieshao investigationonthestructureandelectrochemicalpropertiesoflacemgalnihydrogenstoragealloy AT yongchunluo investigationonthestructureandelectrochemicalpropertiesoflacemgalnihydrogenstoragealloy AT liminwang investigationonthestructureandelectrochemicalpropertiesoflacemgalnihydrogenstoragealloy |