TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The core of the particles comprises nickel or magnesium each in combination with at least one further metal comprising aluminum, lanthanum and lanthanide, manganese, cerium, iron, cobalt, scandium, titanium, zirconium, vanadium, chromium, manganese, and silicon or combinations of two or more of the metals. The core of the particles has an average diameter of below 15 mu m, preferably less than 200.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The organically modified (hetero)silicic acid condensate is produced from or using at least one silane compound of formulae (R1aR2bSiX4-b) (I), (R2cSiX4-c) (II), and (R1dR23-dSiX) (III), silane diol compound of formula (R3Si(OH)) (IV), and/or using at least one organic compound of metal of III main group of germanium and/or a metal of the II, III, IV, V, VI, VII and VIII of subgroup. The organically modified (hetero)silicic acid polycondensate is produced by applying a coating material and crosslinking of the coating material, where the coating material is produced using sol-gel process. The powder is pressed into an electrode shape.R1 = organic crosslinkable group bounded to silicon over a carbon, preferably acrylate and/or methacrylate containing residues or epoxy group and/or isocyanurate containing residues;R2 = organic non-crosslinkable group bounded to silicon over carbon;X = OH (preferred), hydrolyzable group under hydrolysis conditions or silicon leaving group;R3 = optionally substituted alkyl or R1; eithera = 1 or 2; andb = 0 or 1; ora+b = 1 (preferred) or 2;c = 0-4, preferably 0 or 1; andd = 1-3.Preferred Components: The organically modified (hetero)silicic acid condensate has an organic crosslinkable group. EXAMPLE - Nickel (20.4 g) was weighed under argon in a flask (100 ml). A coating material (0.500 g) (obtained by mixing 3-glycidoxypropyltrimethoxysilane (236 g) with diethyl carbonate (355 g), adding ammonium fluoride (0.37 g) and distilled water (27 g)m, stirring the mixture, and spinning the resulting solvent after several days (10-20 days) at 40 degrees C and at a pressure of 100 mbar) in diethyl carbonate and propyl acetate (7 g) were added and stirred after 30 minutes at 40?C and at a pressure of 20 mbar. The temperature was raised to 60 degrees C and spun for 1 hour under these conditions to give corresponding coating passivated powder.