Aluminium gas battery with reduced hydrogen evolution - has acid electrolyte and aluminium@ (alloy) electrode contg. lithium, beryllium, magnesium, calcium, zinc, 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, B, 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 concn. acid soln.. The acid soln. may be HCl and/or pref. a 4-8 (esp. 6)N H2SO4 soln.. The electrolyte may contain halides, pref. fluoride and/or chloride, esp. 20mM-2M chloride, pref. added in acid form. The halide may be (partially) added as a water-soluble halide of Li, Na, K, Ca, Mg, Sr, Ba, Zn, Cd, Hg, Al, Sn, In or Mn. ADVANTAGE - The battery exhibits reduced hydrogen evolution of Al batteries with alkaline electrolyte or slightly acidic NaCl electrolytes.