A novel hydrogen storage system of KLi₃(NH₂)₄-4LiH with superior cycling stability

Bao-Xia Dong, Jing-Jing Gao, Yun-Lei Teng*, Hui Tian, Long-Zheng Wang

School of Chemistry and Chemical Engineering, Yangzhou University

Abstract: In this study, we first examined the hydrogen release, uptake, and reversibility properties of the KLi₃(NH₂)₄-4LiH system and elucidated the influence of potassium cations' substitution into LiNH2 on the hydrogen storage properties of the LiNH₂-LiH composite. Our results show that mixing of the potassium cations into LiNH₂can destabilize LiNH₂, therefore decreasing the hydrogen desorption temperature and enhancing hydrogen desorption rate of the LiNH₂-LiH system. Notably, the KLi₃(NH₂)₄-4LiH composite exhibits a superior cycling stability compared with the LiNH₂-LiH composite prepared under the same condition.

Int. J. Hydrogen Energy, 2016,41, 5371–5377,

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