 The development of new materials that can safely store hydrogen at high densities is crucial for widespread use of hydrogen as an energy carrier, particularly for fuel cell vehicles, where metal borohydrides M, BH4, N are being researched for their potential as hydrogen storage materials. Efforts are focused on improving thermodynamic and kinetic properties to achieve reversible storage at high density but moderate temperature and pressure. This article was authored by Craig M. Jensen, Andreas Suttel, Hywin Lee, and others.