[1]罗辉,王新春,陶小马,等.Li-Al-B-H复合储氢材料的制备及储氢性能研究[J].中国材料进展,2023,42(01):039-45.[doi:10.7502/j.issn.1674-3962.202209006]
　LUO Hui,WANG Xinchun,TAO Xiaoma,et al.Preparation and Hydrogen Storage Properties of Li-Al-B-H Composites[J].MATERIALS CHINA,2023,42(01):039-45.[doi:10.7502/j.issn.1674-3962.202209006]
点击复制

Li-Al-B-H复合储氢材料的制备及储氢性能研究()
分享到：

中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
42
期数:
2023年第01期
页码:
039-45
栏目:
出版日期:
2023-01-31

文章信息/Info

Title:
Preparation and Hydrogen Storage Properties of Li-Al-B-H Composites
文章编号:
1674-3962(2023)01-0039-07
作者:
罗辉; 王新春; 陶小马; 黄存可; 蓝志强; 周文政; 郭进; 刘海镇
（广西大学物理科学与工程技术学院，广西 南宁 530004）
Author(s):
LUO Hui;  WANG Xinchun;  TAO Xiaoma;  HUANG Cunke;  LAN Zhiqiang;  ZHOU Wenzheng;  GUO Jin;  LIU Haizhen
(School of Physical Science and Technology, Guangxi University, Nanning 530004, China)
关键词:
储氢材料; 硼氢化锂; 纳米铝粉; AlB2; Li-Al-B相; 储氢性能
Keywords:
hydrogen storage materials;  lithium borohydride;  nano-Al powder;  AlB2 powder;  Li-Al-B;  hydrogen storage properties
分类号:
TK912
DOI:
10.7502/j.issn.1674-3962.202209006
文献标志码:
A
摘要:
硼氢化锂（LiBH4）的有效储氢密度可达13.6%（质量分数，下同），是一种具有潜在应用前景的储氢材料。但是，LiBH4的热力学稳定性高，导致其吸放氢温度高，且其吸放氢动力学差，可逆条件苛刻，严重限制了其实际应用。针对这些问题，以普通Al粉（记为“Al”）和纳米Al粉（记为“nano-Al”）作为改性添加剂，采用机械球磨法制备了LiBH4+0.5Al和LiBH4+0.5nano-Al（物质的量之比）这2种Li-Al-B-H复合储氢材料，并通过X射线衍射（XRD）、吸放氢测试、热分析等手段研究了2种Al粉制备的Li-Al-B-H复合储氢材料的微结构和放氢性能。放氢性能研究表明，添加Al后，LiBH4的放氢温度得到降低，且以纳米Al粉构建的Li-Al-B-H复合储氢材料具有比以普通Al粉构建的Li-Al-B-H复合储氢材料更优异的放氢性能和循环性能。放氢产物微结构研究表明，在放氢过程中，LiBH4会与Al发生反应生成AlB2和Li-Al-B相，这是LiBH4吸放氢性能提高的关键。另外，由于纳米Al的颗粒尺寸小，比表面积大，反应界面更多，使得LiBH4+0.5nano-Al放氢后生成的AlB2和Li-Al-B相的量比LiBH4+0.5Al更多，这是LiBH4+0.5nano-Al放氢性能优于LiBH4+0.5Al的原因。研究结果将为进一步理解Li-Al-B-H复合储氢材料的储氢性能和储氢机理提供参考。
Abstract:
Lithium borohydride (LiBH4) is a promising hydrogen storage material due to its large effective hydrogen storage capacity of 13.6wt%. However, the high thermodynamic stability resulting in high hydrogen absorption and desorption temperature, poor hydrogen absorption and desorption kinetics, and harsh reversibility conditions seriously limit its practical application. In response to these problems, two kinds of Li-Al-B-H composites (LiBH4+0.5Al and LiBH4+0.5nano-Al) were prepared by mechanical ball milling method using ordinary Al powder (written as “Al”) and nanoscale Al powder (written as “nano-Al”) as modification additives. The microstructures and hydrogen desorption properties of the Li-Al-B-H composites prepared with different Al powders were studied by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), hydrogen absorption and desorption tests, and thermal analysis. The hydrogen desorption performance study shows that the hydrogen desorption temperature of LiBH4 is reduced after adding Al, and the L-Al-B-H composite constructed with nanoAl has better hydrogen releasing performance and cycling performance than the Li-Al-B-H composite constructed with ordinary Al powder. The microstructure study of the hydrogen desorption product shows that during the hydrogen desorption process, LiBH4 reacts with Al to form AlB2 and Li-Al-B phases, which is the key to the improvement of the hydrogen absorption and desorption performance of LiBH4. In addition, due to the smaller particle size, the nanoAl has larger specific surface area and more reaction interfaces, which leads to that the amount of AlB2 and Li-Al-B phases generated after LiBH4+0.5nano-Al dehydrogenation is more than that of LiBH4+0.5Al. This is the reason why the hydrogen releasing performance of LiBH4+0.5nano-Al is better than that of LiBH4+0.5Al. This work provides an important reference for further understanding the hydrogen storage performance and hydrogen storage mechanism of Li-Al-B-H hydrogen storage materials.

备注/Memo

备注/Memo:
收稿日期：2022-09-03 修回日期：2022-11-17 基金项目：广西自然科学基金资助项目（2019GXNSFBA185004）；国家自然科学基金资助项目（52001079）；大学生创新创业训练计划项目（202110593309）第一作者：罗辉，男，1995年生，博士研究生通讯作者：刘海镇，男，1988年生，副教授，博士生导师， Email:liuhz@gxu.edu.cn
更新日期/Last Update: 2022-12-22