TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The two hydride compounds are hydrides, borohydrides and aluminum hydrides of alkali and alkaline earth metals, ammonium, zinc or aluminum. They can be sodium boron hydride, potassium boron hydride, lithium boron hydride, ammonium boron hydride or polyborohydrides of structure MB3H8, M2B10H10, MB10H13, M2B12H12 or M2B20H18.M = Li, Na, K, NH4, Be1/2, Ca1/2, Mg1/2, Zn1/2 or Al1/3.The molar ratio is 95:5-5:95, preferably 60:40-40:60. The liquid phase comprises hydroxide ions. It also comprises a hydroxide ion providing compound from alkali and alkaline earth metal hydroxides or ammonium hydroxide. It also comprises lithium hydroxide, sodium hydroxide, potassium hydroxide (preferably), rubidium hydroxide, cesium hydroxide, calcium hydroxide, magnesium hydroxide, barium hydroxide, zinc hydroxide, aluminum hydroxide or ammonium hydroxide.Preferred Composition: The composition comprises hydride compounds in a total concentration of greater than or equal to0.5, preferably greater than or equal to3 mol/L. A hydroxide ion concentration in the liquid phase is greater than or equal to0.01, preferably greater than or equal to0.1 mol/L.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The liquid phase comprises water, up to 6C and up to 6 OH (cyclo)aliphatic alcohol, 2-4C alkylene glycol, di(2-4C alkylene glycol), poly(2-4C alkylene glycol), mono-1-4C-alkyl ether of 2-4C alkylene glycol, di(2-4C alkylene glycol) or poly(2-4C alkylene glycol), di-1-4C-alkyl ether of 2-4C alkylene glycol, di(2-4C alkylene glycol) or poly(2-4C alkylene glycol), ethylene oxide/propylene oxide block copolymer, ethoxylated aliphatic polyol, propoxylated aliphatic polyol, ethoxylated and propoxylated aliphatic polyol, up to 6C aliphatic ether, up to 6C aliphatic ketone, up to 6C aliphatic aldehyde, 1-4C-alkyl ester of 1-4 alkanoic (aliphatic) acid or up to 10C prim.-tert aliphatic amine. The liquid phase comprises water and at least one of methanol, ethanol, propanol, isopropanol, ethylene glycol, diethylene glycol, 1,2,4-butanetriol, trimethylolpropane, pentaerythritol, sorbitol, glycerol, acetone, methyl, ethyl ketone, diethyl ketone, methyl acetate, ethyl acetate, dioxan, tetrahydrofuran, diglyme, triglyme, monoethanolamine, diethanolamine, triethanolamine, monopropanolamine, dipropanolamine or tripropanolamine. EXAMPLE - A fuel composition containing (wt.%) water (71), potassium hydroxide (10), sodium hydroxide (7), potassium boron hydride potassium (7), and sodium boron hydride (5). The discharge energy of the fuel was 16.2 Wh/124 hour.