TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The positive electrode active material comprises overpressure resistant lithium cobalt oxide, manganic acid dipotassium salt, nickel manganic acid potassium and/or lithium-ion lithium manganese nickel adulterated and modified; the negative electrode active materials comprises natural modified graphite, normal synthetic graphite, middle phase carbon micro ball and/or lithium titanate; the positive and negative conductive agents comprise acetylene black, superconductive carbon ink, nanocarbon, nanocarbon tube, nano silicon dioxide and nano aluminum oxide; the positive and negative binder is respectively high polymer of molecular weight of more than 1000000; and the electrolyte solution comprises lithium hexafluorophosphate and/or oxalic acid boric acid ester lithium and two or less than two solvents comprising ethylene carbonate, vinylene carbonate, methyl ethyl carbonate, diethyl carbonate and/or propylene carbonate. The positive and negative electrode dispersing agents comprises carboxymethylcellulose sodium, ethyl acrylic acid methyl ester and methyl methacrylate; the positive and negative electrode binders are respectively butylbenzene and/or polyvinylidene fluoride; the electrolyte solution comprising 1.2 M lithium hexafluorophosphate and mixing solution of ethyl carbonic ester EC: diethyl carbonic ester, methyl ethyl carbonic ester, vinylidene carbonic ester and cyclohexyl-benzene at ratio of 1:1:1:0.2:0.05. The electrolyte solution further comprises annexing agent comprising cyclohexyl-benzene and biphenyl. The positive and negative electrode current collector is three-dimensional current collector, two-dimensional current collector or metal belt; and the battery cell comprises multipole ear winding type battery cell or an overlapped battery cell. Preferred Processes: The positive and negative electrode sizing agents are prepared by respectively baking active materials, conductive agent, dispersing agent and binders into dry powder, dispersing processing prepared dry powder of active materials, conductive agent and dispersing agent under protection of inert gases to prepare dry powder mixing materials; stirring prepared binder powder with dissolvent, adding prepared dry powder mixing materials in prepared solution and stirring to prepare sizing agent; and colloid milling prepared sizing agent. The negative electrode sizing agent is prepared by adding dispersing agent dry powder into pure water, stirring, adding binder dry powder, and stirring to prepare the solution. The baking temperature and time of active materials and conductive agent are respectively 120-150 degrees C and 2-5 hours; the baking temperature and time of the dispersing agent and the binder are respectively 60-120 degrees C and 1-3 hours; the stirring time for making the binder dry powder and the dissolvent into the solution is 2-3 hours; the stirring speed for making the dry powder mixing materials and the dissolvent into the sizing agent is 2000-3000 revolutions/minute; the sizing agent is colloid milled for three times; and the viscosity of the prepared sizing agent is 8000-12000 Pa.second; the active materials and the conductive agent are respectively 150-250 degrees C and 3-6 hours; the baking temperature and time of the dispersing agent and the binder are respectively 80-100 degrees C and 1-3 hours; the stirring time in the pure water when making the solution by the dispersing agent is 0.5-2.5 hours; the stirring time for adding the binder is 0.2-1.5 hours; the speed for making the sizing agent by the dry powder mixing material and the dissolvent is 2000-3000 revolutions/minute; the sizing agent is colloid milled for three times; and the viscosity of the prepared sizing agent is 3000-6000 Pa.seconds. The multipole ear winding type battery cell is prepared by mutually arranging positive electrode plate, separation film, negative electrode plate opposite to one end of positive and negative electrode plates which is not coated with the sizing agent, mutually and sequentially overlapping parts coated with sizing agents as overlapping body; winding overlapping body to prepare core block; punching two side angle parts at end part not coated with the sizing agent after winding at one end of the core block; forming tongue plate at one end of each positive electrode plate to form the positive electrode pole ear; punching two side angle parts at the end part not coated with the sizing agent after winding at the other end of the core block to make the core block as battery cell; and mutually overlapping multiple positive and negative electrode plates and separation film with part coated with sizing agent, separation film and negative electrode plate to prepare core block with needed layer, and preparing core block into battery cell.