Enhanced air-poisoning resistance in vanadium-based hydrogen storage alloy by addition of Si

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外文摘要：Surface poisoning typically leads to the severe capacity degradation and poses a significant challenge to the durability of hydrogen storage materials.In this study,we report a novel approach to enhance the air-poisoning resistance of vanadium-based alloys by introducing of the air-tolerant hydride.Through the addition of 1 at％Si,a small amount of Ti5Si3 is induced in V75Ti11Cr13Fe1,which turns into Ti5Si3H0.9 during the hydrogen sorption cycles.Ti5Si3H0.9 shows high resistance against air,which could serve as the hydrogen-entry window for the bulk.As a result,the(V75Ti11Cr13Fe1)ggSi1 alloy maintains approximately 85％of the hydrogen storage capacity after 10 cycles in H2+250 ppm air,in contrast to the near-complete loss of hydrogen sorption activity in Si-free alloy under the same condition.

外文关键词：

Hydrogen storageVanadium-based alloysPoisoning resistanceCycling stability

作者：

Qingfeng Xie、Ming Jiang、Hanyang Kong、Qiuwei Huang、Chaoling Wu、Yao Wang、Yungui Chen、Hongjiao Li、Yigang Yan

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作者单位：

Institute of New Energy and Low-Carbon Technology,Sichuan University,Chengdu,610207,China

School of Chemical Engineering,Sichuan University,Chengdu,610065,China

School of Materials Science and Engineering,Sichuan University,Chengdu,610065,China

Engineering Research Center of Alternative Energy Materials and Devices,Ministry of Education,China

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出版年：

2024

DOI：

10.1016/j.pnsc.2024.05.010

自然科学进展·国际材料(英文)

国家自然科学基金委员会

自然科学进展·国际材料(英文)

影响因子：0.25

ISSN：1002-0071

年,卷(期)：2024.34(4)