TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Process: The preparation of (OC1) particles in step (a) is performed by a process of dissolving the precursor at least partially in a liquid medium; applying heat treatment to react the precursors and cause precipitation of the oxide (OC1); cooling the reaction mixture; recovering the particles; washing and drying. The heat treatment is conducted at 120-250 degrees C. The heat treatment of step (b) is performed at 120-250 degrees C. The step (c) is performed by the conditions comprising: pyrolysis of organic precursor, comprising hydrocarbons and their derivatives, polyhydric compounds and polymers; contacting the complex particles from step (b) with a compound that has one or more carbon-halogen bonds and reduction of the compound at low or medium temperatures, preferably less than 400 degrees C; and contacting the complex particles from step (b) with a compound having one or more (-CH-CY1-) bonds and removal of hydrogen compound of formula (HY1), by a reaction with base (B1) at low temperature to form olefin compound of formula (-C=C-) and compound of formula (B1HY1).Y1 = halo or pseudo-halo; andB1 = base.Preferred Components: The alkaline metal is lithium, sodium and potassium. The alkaline metal is the same in OC1 and OC2. The complex oxide (OC1) has the structure of formula (AzM1(1-a)M2aXO4), preferably lithium manganese phosphate (LiMnPO4), in which manganese (Mn) can be partially replaced by cobalt and/or nickel. The complex oxide (OC2) is: lithium iron borates (LiFeBO3); and of formula (AzM3(1-b)M4bX1aO4) or (Ax((M3(1-c)M4c)2(X2aO4)3)). (OC2) is lithium iron phosphate (LiFePO4), lithium iron vanadate (LiFeVO4), lithium iron silicate (Li2FeSiO4), lithium iron titanate (LiFeTiO4) and lithium iron germanate (LiFeGeO4). The complex oxide (OC1) has an average size of 20 nm to 100 mu m, the complex oxide (OC2) has a thickness of 1 nm to 6 mu m, and the carbon deposit has a thickness of 0.1-100 nm. The collector current is metal, which is stable in oxidation, comprising aluminum, titanium and stainless steel.M1 = at least one element comprising Mn, Co, Cu or Ge;M2 = a transition metal other than Mn or Co;a = 0-0.5;z = 0-2;X = an element comprising P, Si, V or Ti;M3 = at least one element comprising Fe, Mo, Pt or Pd;M4 = a transition metal different from M3;b = 0-0.5;c = 0-0.5;x = 0-3; andX1a = at least one element comprising P, Si, S, V, Ti or Ge.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The composite material comprises at least 60 wt.% of active material, a binder and/or additive conferring electronic conduction. EXAMPLE - Lithium hydroxide monohydrate (4.62 g) was dissolved in demineralized and degassed water (30 ml) to give solution A. Manganese nitrate tetrahydrate (9.27 g) was dissolved in demineralized and degassed water (50 ml) to give solution B. Aqueous solution (4 g) having 85% of phosphoric acid was dissolved in demineralized and degassed water to give solution C under nitrogen atmosphere. The solutions B and C were mixed, then gradually added to the solution A. The reaction mixture was then poured under nitrogen in integrated poly(tetrafluoroethylene) (PTFE) container in a pressurized stainless steel chamber (volume of 325 ml), and the assembly was placed in an oven at 220 degrees C for 7 hours, then cooled to room temperature. The precipitated powder was recovered by filtration, washed 3 times with distilled water (100 ml), then dried in an oven at 90 degrees C for 12 hours under nitrogen atmosphere to obtain lithium manganese phosphate (LiMnPO4) (12 g). Lithium hydroxide monohydrate (3.08 g) was dissolved in demineralized and degassed water (40 ml) under nitrogen atmosphere to obtain a solution D. Ferrous-sulfate heptahydrate (10 g) and diammonium hydrogen phosphate ((NH4)2HPO4) (4.75 g) were dissolved in demineralized and degassed water (50 ml) to obtain a solution E. Then the solution D was added to the solution E to obtain a precursor solution. Particles of LiMnPO4 (10 g) were introduced in the precursor solution. The obtained reaction medium was poured under nitrogen atmosphere in integrated PTFE container in a pressurized stainless steel chamber. The assembly was placed in an oven at 220 degrees C for 7 hours, then cooled to room temperature. The obtained compound was precipitated and recovered by filtration, washed 3 times with distilled water (100 ml), then dried in an oven at 90 degrees C for 12 hours under nitrogen and worked up to obtain the compound comprising lithium iron phosphate (LiFePO4) phase and LiMnPO4 phase (15.1 g). The obtained compound was introduced into a solution of cellulose acetate in a mixture of acetone-isopropanol (1/1). The ratio of acetate/(LiMnPO4)LiFePO4 was 1/7. Then, the reaction mixture was subjected to the heat treatment, under inert atmosphere, at 400 degrees C for 1 hour, followed by at 600 degrees C for 3 hours to obtain the material.