TY  - JOUR
AU  - Hu, Shiyang
AU  - Ding, Xin
AU  - Chen, Ruirun
AU  - Ma, Xiangfeng
AU  - Cao, Wenchao
AU  - Shen, Hongxian
AU  - Zhang, Yong
PY  - 2026
TI  - Rapidly Solidified Fibers for Optimizing Hydrogen Storage Property via In Situ Multiphase Catalysts
JO  - Energy Material Advances
SN  - 2097-1133
SP  - 0152
VL  - 7
AB  - The hydrogen de-/absorption properties of high-capacity Mg-based hydrogen storage alloys are hard to improve due to coarse α-Mg grains and catalytic element segregation. In this study, rapid solidification is introduced to Mg97Ni3-xYx (x = 0, 0.25, 0.5, 1, at %) alloys, aiming to improve hydrogenation capacity and de-/hydrogenation kinetic jointly. The results indicate that homogeneous and refined microstructure is formed in rapid-solidified fibers, and NiY3 and Mg2Ni phases are generated in heat-treated fibers. Hydrogen absorption properties are improved as Y content is increased to 0.5 at %. The in situ generated YH3 phases produce a “synergistic effect” on MgH2 desorption and further reduce overall dehydrogenation temperature. Due to the homogeneous and refined microstructure and the ultrafine dispersed YH2/YH3 phases introduced by moderate Y doped, the fiber alloy can absorb more hydrogen in stage 1 and improve the hydrogenation capacity and hydrogenation rate.
UR  - https://doi.org/10.34133/energymatadv.0152
DO  - 10.34133/energymatadv.0152