SiO2包覆对La-Ni-Al-Mn储氢合金抗毒化性能的影响研究

石红强; 郭秀梅; 李志念; 王树茂; 袁宝龙; 蒋利军

doi:10.19912/j.0254-0096.tynxb.2022-0535

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太阳能学报 ›› 2022, Vol. 43 ›› Issue (6) : 355-361. DOI: 10.19912/j.0254-0096.tynxb.2022-0535

SiO₂包覆对La-Ni-Al-Mn储氢合金抗毒化性能的影响研究

石红强^1~3, 郭秀梅^1,2, 李志念^1,2, 王树茂^1,2, 袁宝龙^1,2, 蒋利军^1,2,4

作者信息 +

EFFECT OF SiO₂ COATING ON ANTI-POISONING PROPERTIES OF La-Ni-Al-Mn HYDROGEN STORAGE ALLOYS

Shi Hongqiang^1-3, Guo Xiumei^1,2, Li Zhinian^1,2, Wang Shumao^1,2, Yuan Baolong^1,2, Jiang Lijun^1,2,4

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文章历史 +

摘要

以LaNi_3.7Al_0.75Mn_0.55（La-Ni-Al-Mn）储氢合金为基体,采用低成本的气相二氧化硅溶胶包覆法对储氢合金进行抗毒化改性研究。制备的La-Ni-Al-Mn/SiO₂复合材料表现出良好的抗毒化性能和循环稳定性,经50次循环后,合金吸氢速率保持不变,吸氢容量达1.060%。复合材料抗毒化机理为：非晶态SiO₂包覆层在热处理过程中形成原子短程有序排布的渗氢点,有效阻挡O₂、N₂等大分子气体的透过。通过对复合材料热处理工艺的优化,最终获得其最佳的热处理工艺为200 ℃下热处理2 h。

Abstract

Using LaNi_3.7Al_0.75Mn_0.55（La-Ni-Al-Mn） hydrogen storage alloys as the matrix, a low-cost fumed silica sol coating method was used to study the anti-poisoning modification of hydrogen storage alloy. The La-Ni-Al-Mn/SiO₂composites show good anti-poisoning performance and cycle stability. After 50 cycles, the hydrogen absorption rate of the composites remains unchanged, and the hydrogen absorption capacity reaches 1.060%. The anti-poisoning mechanism of the composite material is as follows： the amorphous SiO₂ coating layer forms a hydrogen permeation point with a short-range orderly arrangement of atoms during the heat treatment process, which effectively blocks the permeation of macromolecular gases such as O₂, N₂. Through the optimization of the heat treatment process of the composites, the optimal heat treatment process is finally obtained at 200 ℃ for 2 h.

导出引用

石红强, 郭秀梅, 李志念, 王树茂, 袁宝龙, 蒋利军. SiO₂包覆对La-Ni-Al-Mn储氢合金抗毒化性能的影响研究[J]. 太阳能学报. 2022, 43(6): 355-361 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0535

Shi Hongqiang, Guo Xiumei, Li Zhinian, Wang Shumao, Yuan Baolong, Jiang Lijun. EFFECT OF SiO₂ COATING ON ANTI-POISONING PROPERTIES OF La-Ni-Al-Mn HYDROGEN STORAGE ALLOYS[J]. Acta Energiae Solaris Sinica. 2022, 43(6): 355-361 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0535

中图分类号： TK91

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