Improved Dehydrogenation Performance of Li-B-N-H by Doped NiO

Metals

Yongpeng Xia¹  Fang Yu¹  Jun Chen¹  Yongjin Zou¹  Peng Li¹  Fen Xu¹  Lixian Sun¹  Xia Yang¹  Hailiang Chu¹  Yipeng Wu¹  Huanzhi Zhang¹ 

[1] Guangxi Key Laboratory of Information Materials, Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China;

关键词: lithium borohydride;    lithium amide;    flower-like NiO;    hydrogen storage;   

DOI  :  10.3390/met8040258

来源: DOAJ

【 摘 要 】

In order to improve the dehydrogenation properties of the Li-B-N-H system, a flower-like NiO was successfully synthesized using the hydrothermal method. The effect of the NiO on the dehydrogenation properties of the LiBH4-2LiNH2 system was studied. The results showed that the dehydrogenation properties of the LiBH4-2LiMH2 system were significantly enhanced by doping with NiO. The composite doped with 5 wt. % NiO exhibited optimal hydrogen storage properties. It released about 10.5 wt. % hydrogen below 300 °C, and the onset dehydrogenation temperature was only 90 °C, 110 °C lower than that of LiBH4-2LiNH2. The isothermal dehydrogenation experiment indicated that the LiBH4-2LiNH2-5 wt. % NiO composite released 8.8 wt. % hydrogen within 15 min at 150 °C. Structural analysis revealed that the as-prepared NiO was reduced to metallic Ni, which worked as an active catalytic species in the remainder of the dehydrogenation process. The Mass Spectrometer (MS) analyses showed that the doped NiO inhibited the content of NH3 released in the process of the dehydrogenation of LiBH4-2LiNH2-NiO.

【 授权许可】

Unknown