TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Process: Sintering is carried out at 600-750 degrees C, with insulation for 0.5-8 hours. The iron phosphate lithium powder size is 200-500 nm. The second step comprises:(A) preparing aluminum powder with size of 50-1000 nm;(B) milling nano-aluminum powder with sintered iron phosphate lithium powder at high speed (500-2000 revolutions/minute) under the protection of inert gas comprising nitrogen or argon, and dispersing, where ratio of milling medium to material is 1.5:1-6:1;(C) introducing ammonia, hydrogen or argon gas in tubular furnace, sintering and insulating mixture of aluminum powder and iron phosphate lithium powder at 650-750 degrees C so that aluminum is melted and aluminum element coats the iron phosphate lithium particles to form iron phosphate lithium/aluminum compound material; and(D) cooling compound material under inert gas protection.The nano-aluminum powder and sintered iron phosphate lithium powder are milled with organic solvent comprising acetone, isopropanol, n-butyl alcohol, tert-butanol and/or hexanediol under inert gas protection. The coated aluminum takes up 0.1-5% the total quantity of compound material. The method comprises:(A) preparing aluminum fused salt electroplate liquid including aluminum room temperature fuse salt, organic reducer, and organic solvent unreacted with aluminum fuse salt including mixture of inorganic metal aluminum halide salt and organic halide salt;(B) adding chlorate solution including active metal palladium, rhodium or ruthenium into ethanol, propyl alcohol or ethylene glycol to prepare activator with alcohol-water mixture;(C) immersing iron phosphate lithium material in activator under nitrogen or argon inert gas, back-flowing so that active metal is deposited on activated substrate iron phosphate lithium material, cleaning and filtering activated iron phosphate lithium material, and vacuum-drying;(D) placing activated iron phosphate lithium material in aluminum fused salt electroplate liquid under inert gas protection, and controlling reaction condition to deposit aluminum element on surface of iron phosphate lithium particles, where oxidation-reduction reaction temperature is at 30-50 degrees C;(E) filtering aluminum fused salt electroplate liquid, and cleaning iron phosphate lithium particles deposited with aluminum element using absolute alcohol or propyl alcohol to separate iron phosphate lithium and aluminum compound material; and(F) vacuum-drying separated iron phosphate lithium and aluminum compound material.Preferred Components: The aluminum fused salt is liquid at room temperature. Preferred Composition: The inorganic aluminum salt comprises aluminum halide (10-60 wt.%).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The organic solvent comprises benzene, methylbenzene and/or dimethylbenzene. The organic reducer comprises aluminum hydride lithium, lithium hydride, diisobutyl aluminum hydride or isopropanol aluminum. Preferred Composition: The organic halide comprises imidazole halide salt, pyridinium and hyamine (30-80% of the total amount of fused salt). The concentration of organic reducer in electroplate liquid is 0.005-0.5 mol/L. The mole ratio of organic reducer and aluminum salt in aluminum fused salt is 0.5-5.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The activator comprises polymer stabilizer with concentration of not greater than 0.01 mol/L. The polymer stabilizer includes polyvinyl alcohol or ethylene glycol.