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Guanidinium Octahydrotriborate: An Ionic Liquid With High Hydrogen Storage Capacity, Weidong Chen, Zhenguo Huang, Guotao Wu, Teng He, Zhao Li, Juner Chen, Zaiping Guo, Hua-Kun Liu, Ping Chen

Australian Institute for Innovative Materials - Papers

For chemical hydrogen storage, capacity is one key criterion that has spurred intense efforts to investigate compounds with high hydrogen content. The guanidinium cation and the octahydrotriborate anion possess 6 H⁺ and 8 H^-, respectively. The combination of these two ions yields guanidinium octahydrotriborate with 13.8 wt% hydrogen. This paper presents its facile synthesis, as confirmed by ¹¹B and ¹H nuclear magnetic resonance spectroscopy. The results show that guanidinium octahydrotriborate is an ionic liquid with a melting point below -10°C, which makes it a possible injectable/pumpable hydrogen carrier. It decomposes selectively to hydrogen, in stark …