Immobilization of Aluminum Borohydride Hexammoniate in a Nanoporous Polymer Stabilizer for Enhanced Chemical Hydrogen Storage

摘要

With global warming and environmental pollution worsening, the search for alternative fuels is a matter of great importance. Hydrogen is an excellent energy-storage medium because of its abundance, high chemical energy, and low-emission combustion. However, hydrogen remains underutilized as a fuel source because of a lack of storage capacity. Recently, considerable efforts have been directed towards light-weight metal hydrides and chemical hydrides. Among them, metal borohydrides (M(BH4)_m, MBs) have attracted significant interest because of their high theoretical hydrogen content. Unfortunately, the use of MBs in portable power sources is limited by the poor thermodynamic and kinetic properties of hydrogen release. Recently, we have adopted an efficient strategy that introduces H~(δ+) to MBs by NH3 coordination and results in the formation of metal borohydride ammoniates (MBAs, M(BH4)_m·nNH3).