TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The composite material is selected from nano-lithium titanate having a spinel structure, sub-micron lithium titanate having a spinel structure; carbon fiber, graphene, carbon nanotubes, nano-silver, nano-copper, nano-silicon having a spinel structure, nano-silicon dioxide, titanium dioxide nano-powder, titanium dioxide nano-tube, titanium dioxide nano-wire and/or amorphous titanium oxide. The electrolyte is organic electrolyte comprising lithium, electrolyte lithium salt and an electrolyte solvent. The electrolyte lithium salt is lithium hexafluorophosphate, lithium hexafluoarsenate, lithium perchlorate, lithium bis(trifluoromethanesulfonimide), lithium tetrafluoroborate, lithium hexafluoroantimonate and/or monolithium monocarbon trifluorosulfite. The concentration of the electrolyte is 0.1-5 mol/l, preferably 0.5-2 mol/l. The conductive agent is conductive carbon black, superconducting carbon, carbon fiber, Ketjenblack (RTM: Electro-conductive carbon black), conductive graphite, acetylene black, carbon nano tube, graphite, intermediate phase carbon microsphere and/or crystalline flake graphite. The positive electrode current collector is aluminum foil. The negative electrode current collector is a copper foil. The shell is aluminum shell, steel shell or polymer packaging film. Preferred Composition: The concentration of the M element doped nano-oxide iron phosphate ferrovanadium lithium composite material is 0.01-10 wt.%, preferably 1-6 wt.%.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The diaphragm is polypropylene microporous film, polypropylene-polyethylene-polypropylene three-layer microporous film, modified polypropylene micro-porous film or modified polypropylene-polyethylene-polypropylene three-layer microporous film. The electrolyte solvent is selected from propylene carbonate, ethylene carbonate, 1,3-propylene glycol borate, carbon acid, ethylene carbonate, dimethyl carbonate, methyl ethyl carbonate, diethyl carbonate, dimethoxyethane, ethylene glycol dimethyl ether or methyl ethyl carbonate. The adhesive is PTFE, polyacrylic ester, polyurethane and/or polyvinylidene fluoride-hexafluoropropylene. The solvent-I is N, N-methyl pyrrolidone, acetone, N, N-dimethyl formamide, N, N-dimethyl acetamide and/or dimethyl sulfoxide. Preferred Composition: The positive electrode plate comprises 70-90 mass% positive electrode active material, 5-20 mass% a conductive agent, 5-10 mass% binder, solvent-I and the positive electrode current collector. The negative electrode plate comprises 75-92 mass% the negative electrode active material, 5-17 mass% conductive agent, 3-8 mass% binder, solvent-I and the negative electrode current collector.