Aluminium gas battery for reduced evolution of hydrogen - has acid electrolyte and anode of aluminium@ (alloy) contg. lithium, magnesium, calcium, zinc, cadmium, etc.

摘要

An Al gas battery has an acid electrolyte and an anode of Al or Al alloy contg. one or more of Li, Be, Mg, Ca, Zn, Cd, B, Ga, In, La, Ce, Nd, Tl, C, Si, Ti, Ge, Sn, P, As, Nb, Sb, Ta, Bi, Se, Te, Mn, Re or Pd. The electrolyte is pref. in strongly acidic form and is pref. a mineral acid, esp. a 0.1N to conc. H2SO4 and/or HCl soln.. This acid soln. is pref. a 0.5N aq. HCl soln. or a 4-8 (esp. 6) N aq. H2SO4 soln.. The electrolyte may contain 20mM to 2M halides, pref. chlorides. ADVANTAGE - The battery exhibits reduced hydrogen evolution cf. Al batteries having alkaline electrolytes or slightly acidic NaCl electrolytes.