首页|Decorating crystalline YFe2-xAlx on the Mg60La10Ni20Cu10 amorphous alloy as"hydrogen pump"to realize fast de/hydrogenation

Decorating crystalline YFe2-xAlx on the Mg60La10Ni20Cu10 amorphous alloy as"hydrogen pump"to realize fast de/hydrogenation

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Mg-based amorphous alloys are one of the potential hydrogen storage materials but suffer from sluggish dehydrogenation/hydrogenation(de/hydrogenation)kinetics.In this work,as a new strategy,a hydrogen pump is built on the surface of amorphous alloys to solve this problem.By milling crystalline YFe2-xAlx hydrogen storage alloy with Mg60La10Ni20Cu10 amorphous alloy,fine crystalline particles were seeded on amorphous alloy powder to form a"strawberry"structure.According to the TEM observation,a metal-lurgical bonding boundary formed between the Mg-based amorphous matrix and the Y-Fe-Al crystalline alloy.By microstructure and de/hydrogenation kinetics investigation,the"hydrogen pump"effect of the seeded crystalline alloy was confirmed,which makes it much easier for the hydrogen to dissociate on and diffuse through the surface of the Mg-based amorphous alloy.With such effect,the H absorption rate of Mg60La10Ni20Cu10 amorphous alloy became almost eight times faster and it absorbs～2.8 wt.％in 1 h at 130 ℃ under 4.5 MPa-H2.Further,fast hydrogenation can even achieve at 70 ℃ and the low-temperature dehydrogenation kinetics of the amorphous hydride can be also greatly promoted.The present work proves that surface modification is of great importance for obtaining Mg-based amorphous alloy with ideal hydrogen storage performance.

Hydrogen storageMg-based amorphous alloyHydrogen pumpComposite structure

L.J.Huang、H.Wang、L.Z.Ouyang、M.Zhu、H.J.Lin

展开 >

School of Materials Science and Engineering,Key Laboratory of Advanced Energy Storage Materials of Guangdong Province,South China University of Technology,Guangzhou 510641,China

Institute of Advanced Wear & Corrosion Resistance and Functional Materials,Jinan University,Guangzhou 510632,China

National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFund for Innovative Research Groups of the National Natural Science Foundation of China

2022YFB380380152271214517278015207115751621001

2024

10.1016/j.jmst.2023.07.022

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.173(6)
  • 52