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(hào):

1674-3962(2023)01-0030-09

作者:

李媛; 陳康莉; 王文鳳; 張璐; 韓樹(shù)民

（燕山大學(xué)環(huán)境與化學(xué)工程學(xué)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(guān)鍵詞:

儲(chǔ)氫合金; La-Mg-Ni系合金; 超晶格合金; 相結(jié)構(gòu); 儲(chǔ)氫性能

Keywords:

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

分類號(hào):

TG139+.7;TK912

DOI:

10.7502/j.issn.1674-3962.202208037

文獻(xiàn)標(biāo)志碼:

A

摘要:

氫的燃燒熱值高、儲(chǔ)量豐富、燃燒產(chǎn)物零污染，被認(rèn)為是理想的能源載體。氫能的發(fā)展對(duì)“雙碳”目標(biāo)的實(shí)現(xiàn)具有重要的支撐作用，而氫能的發(fā)展又離不開(kāi)高密度、低成本的儲(chǔ)氫材料。La-Mg-Ni系A(chǔ)2B7型儲(chǔ)氫合金是在La-Ni二元合金的基礎(chǔ)上發(fā)展起來(lái)的一類新型儲(chǔ)氫合金，具有儲(chǔ)氫容量高、原料成本低等優(yōu)勢(shì)。Mg加入到La-Ni合金后進(jìn)入到\[A2B4\]亞單元中，抑制了氫致非晶化現(xiàn)象，使結(jié)構(gòu)保持穩(wěn)定，加速了合金的實(shí)用化進(jìn)程。La-Mg-Ni系A(chǔ)2B7型儲(chǔ)氫合金本征儲(chǔ)氫容量可達(dá)到1.80%以上（質(zhì)量分?jǐn)?shù)），顯著高于已經(jīng)商品化的AB5型儲(chǔ)氫合金。La-Mg-Ni系A(chǔ)2B7型儲(chǔ)氫合金的晶體結(jié)構(gòu)可調(diào)控性強(qiáng)，并且容易受到組成與制備條件細(xì)微變化的影響。基于以上認(rèn)識(shí)，重點(diǎn)關(guān)注了關(guān)于La-Mg-Ni系A(chǔ)2B7型儲(chǔ)氫合金組成與制備技術(shù)等相關(guān)的研究報(bào)道，較為系統(tǒng)地綜述了元素取代和制備技術(shù)等對(duì)La-Mg-Ni系A(chǔ)2B7型儲(chǔ)氫合金相結(jié)構(gòu)與儲(chǔ)氫性能及電化學(xué)性能的影響，總結(jié)了合金發(fā)展中尚需解決的問(wèn)題，為制備性能優(yōu)良的合金提供了思路與依據(jù)，并對(duì)合金未來(lái)的發(fā)展趨勢(shì)進(jìn)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.