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| Effect of Different Mn Contents on Properties of A2B7-Type La-Y-Ni Hydrogen Storage Alloy |
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Received:April 17, 2023
Revised:April 25, 2023
Accepted:April 28, 2023
Published Online:July 10, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2023.08.011 |
| KeyWord:Mn contents; La-Y-Ni hydrogen storage alloy; phase structure; maximum hydrogen absorption |
| Author | Institution |
| ZHENG Bo |
江西江钨浩运科技有限公司 |
| LIU Wen-wen |
赣州有色冶金研究所有限公司;江西江钨浩运科技有限公司 |
| REN Quan-bing |
江西江钨浩运科技有限公司 |
| LAI Hua-sheng |
赣州有色冶金研究所有限公司;江西江钨浩运科技有限公司 |
| FENG Lan |
江西江钨浩运科技有限公司 |
| PI Xiong |
江西江钨浩运科技有限公司 |
| LI Rong-hua |
江西江钨浩运科技有限公司 |
| ZHONG MING |
江西江钨浩运科技有限公司 |
| LIN Hao |
江西江钨浩运科技有限公司 |
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| Abstract: |
| A2B7-type LaY2Ni10.2—xMnxAl0.3 (x=0.1,0.2,0.3,0.4,0.5) hydrogen storage alloys with different Mn contents were prepared by vacuum melting. The effect of partial replacement of Ni element by B-side Mn element on the structure and properties of the alloy was systematically studied by means of phase performance test, gaseous hydrogen storage performance test and electrochemical charge-discharge cycle performance test. The results show that the prepared alloy has polyphase structure, with Ce2Ni7 as the main phase, and there are a small amount of Gd2Co7, PuNi3 and LaNi5 phases. The abundance of main Ce2Ni7 phase increasse first and then drops with the increase of Mn content. When x is 0.3, the maximum hydrogen absorption of LaY2Ni9.9Mn0.3Al0.3 alloy is 1.131wt%. After 150 cycles of charge and discharge, LaY2Ni9.9Mn0.3Al0.3 alloy has the highest capacity retention rate of 58.0%. |
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