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

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International Pub Date : 2024-08-01 DOI:10.1016/j.pnsc.2024.05.010

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Abstract

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 Ti₅Si₃H_0.9 during the hydrogen sorption cycles. Ti₅Si₃H_0.9 shows high resistance against air, which could serve as the hydrogen-entry window for the bulk. As a result, the (V₇₅Ti₁₁Cr₁₃Fe₁)₉₉Si₁ 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.

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通过添加硅增强钒基储氢合金的抗气毒性能

表面中毒通常会导致严重的容量衰减，并对储氢材料的耐用性构成重大挑战。在本研究中，我们报告了一种通过引入耐空气氢化物来增强钒基合金耐空气中毒性能的新方法。通过添加 1% 的 Si，在 V75Ti11Cr13Fe1 中诱导出少量 Ti5Si3，并在吸氢循环过程中转化为 Ti5Si3H0.9。Ti5Si3H0.9 对空气有很高的阻力，可作为块体的氢进入窗口。因此，(V75Ti11Cr13Fe1)99Si1 合金在 H2 + 250 ppm 空气中循环 10 次后仍能保持约 85% 的储氢能力，而无 Si 合金在相同条件下几乎完全丧失了吸氢活性。

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来源期刊

Progress in Natural Science: Materials International 综合性期刊-综合性期刊

CiteScore

8.60

自引率

2.10%

发文量

2812

审稿时长

49 days

期刊介绍： Progress in Natural Science: Materials International provides scientists and engineers throughout the world with a central vehicle for the exchange and dissemination of basic theoretical studies and applied research of advanced materials. The emphasis is placed on original research, both analytical and experimental, which is of permanent interest to engineers and scientists, covering all aspects of new materials and technologies, such as, energy and environmental materials; advanced structural materials; advanced transportation materials, functional and electronic materials; nano-scale and amorphous materials; health and biological materials; materials modeling and simulation; materials characterization; and so on. The latest research achievements and innovative papers in basic theoretical studies and applied research of material science will be carefully selected and promptly reported. Thus, the aim of this Journal is to serve the global materials science and technology community with the latest research findings. As a service to readers, an international bibliography of recent publications in advanced materials is published bimonthly.