The improved Hydrogen Storage Performances of the Multi-Component Composite: 2Mg(NH2)2–3LiH–LiBH4

Energies

Han Wang¹  Hujun Cao¹  Guotao Wu¹  Teng He¹  Ping Chen¹ 

[1] Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; E-Mails:

关键词: hydrogen storage;    amide-hydride system;    sorption kinetics;    Li₂BNH₆;   

DOI  :  10.3390/en8076898

来源: mdpi

【 摘 要 】

2Mg(NH₂)₂–3LiH–LiBH₄ composite exhibits an improved kinetic and thermodynamic properties in hydrogen storage in comparison with 2Mg(NH₂)₂–3LiH. The peak temperature of hydrogen desorption drops about 10 K and the peak width shrinks about 50 K compared with the neat 2Mg(NH₂)₂–3LiH. Its isothermal dehydrogenation and re-hydrogenation rates are respectively 2 times and 18 times as fast as those of 2Mg(NH₂)₂–3LiH. A slope desorption region with higher equilibrium pressure is observed. By means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR) analyses, the existence of Li₂BNH₆ is identified and its roles in kinetic and thermodynamic enhancement are discussed.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.