文章信息/Info

Title:

Investigation on Phase Structure and Hydrogen Storage Properties of La-Mg-Ni-Based A2B7-Type Alloys

文章編號:

1674-3962(2023)01-0030-09

作者:

李媛; 陳康莉; 王文鳳; 張璐; 韓樹民

（燕山大學環境與化學工程學院, 河北 秦皇島 066004）

Author(s):

LI Yuan;  CHEN Kangli;  WANG Wenfeng;  ZHANG Lu;  HAN Shumin

(School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China)

關鍵詞:

儲氫合金; La-Mg-Ni系合金; 超晶格合金; 相結構; 儲氫性能

Keywords:

hydrogen storage alloys;  La-Mg-Ni-based alloys;  super-lattice alloys;  phase structure;  hydrogen storage properties

分類號:

TG139+.7;TK912

DOI:

10.7502/j.issn.1674-3962.202208037

文獻標志碼:

A

摘要:

氫的燃燒熱值高、儲量豐富、燃燒產物零污染，被認為是理想的能源載體。氫能的發展對“雙碳”目標的實現具有重要的支撐作用，而氫能的發展又離不開高密度、低成本的儲氫材料。La-Mg-Ni系A2B7型儲氫合金是在La-Ni二元合金的基礎上發展起來的一類新型儲氫合金，具有儲氫容量高、原料成本低等優勢。Mg加入到La-Ni合金后進入到\[A2B4\]亞單元中，抑制了氫致非晶化現象，使結構保持穩定，加速了合金的實用化進程。La-Mg-Ni系A2B7型儲氫合金本征儲氫容量可達到1.80%以上（質量分數），顯著高于已經商品化的AB5型儲氫合金。La-Mg-Ni系A2B7型儲氫合金的晶體結構可調控性強，并且容易受到組成與制備條件細微變化的影響�；�于以上認識，重點關注了關于La-Mg-Ni系A2B7型儲氫合金組成與制備技術等相關的研究報道，較為系統地綜述了元素取代和制備技術等對La-Mg-Ni系A2B7型儲氫合金相結構與儲氫性能及電化學性能的影響，總結了合金發展中尚需解決的問題，為制備性能優良的合金提供了思路與依據，并對合金未來的發展趨勢進行了展望。

Abstract:

Hydrogen has been considered as an ideal energy carrier owing to its high combustion heat, abundant resource and zero pollutant. Development of hydrogen energy will play a positive effect on carbon peaking and carbon neutrality goals, while it requires high-capacity and low-cost functional hydrogen storage materials. La-Mg-Ni-based A2B7-type hydrogen storage alloys originated from La-Ni binary alloys have the advantages of high capacity, low raw material cost. Mg addition into \[A2B4\] sub-units in La-Ni binary alloys suppresses hydrogen introducing amorphization and strengthens the bulk structure. The capacity of La-Mg-Ni-based A2B7-type hydrogen storage alloys is as high as 1.80wt%, much higher than commercial AB5�瞭ype alloys. The crystal structure of La-Mg-Ni-based A2B7-type hydrogen storage alloys is adjustable and usually influenced by elemental substitution and preparation techniques. Based on these above, this paper reviews the influence of elemental substitution and preparation techniques on phase structure and hydrogen storage properties of La-Mg-Ni-based A2B7-type hydrogen storage alloys and points out problems in alloy development. It is devoted to providing ideas and theoretical guidance for getting high�瞤erformance La-Mg-Ni-based A2B7-type hydrogen storage alloys.