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Three types of polymer lithium-ion battery

by:Vglory      2020-12-05
Source: 2020 - 03 - 24 and clicks appear: lithium polymer battery can be divided into three categories: 1. Solid electrolyte of lithium battery. The electrolyte is a mixture of polymer and salt. This kind of battery low ionic conductivity at room temperature, suitable for high temperature applications. 2. Gel polymer electrolyte of lithium battery. In the solid polymer electrolyte adding plasticizer and other additives, and then walk ionic conduction, the battery can be used at room temperature. 3. The polymer lithium-ion batteries anode materials. Conductive polymers as cathode materials, the energy is three times as many existing lithium-ion batteries, is the latest generation of lithium-ion batteries. By using solid electrolyte instead of liquid electrolyte, compared with the liquid lithium batteries, lithium polymer battery can thin shape, with any area of any shape and other benefits, also won't against leakage and combustion explosion safety problem, so you can use lu: su composite membrane manufacturing battery shell, then you can go the whole battery capacity; Polymer lithium battery can also act as a positive electrode polymer materials, the ratio of the mass and energy will be more than 50% higher than the liquid lithium battery. In addition, the polymer lithium battery in the operating voltage, charge and discharge cycle life difficult than lithium battery. Lithium ion battery of the structure and principle of the main part of the lithium ion battery: ( 1) The positive active material is mainly refers to the lithium cobalt oxide, lithium manganese acid lithium nickel, lithium iron phosphate, acid, manganese acid lithium nickel, conductive fluid collection is generally used in 10 - 20 microns thickness of aluminum foil; ( 2) Barrier a special kind of plastic film, it can make lithium ions, but also have the effect of electrical insulators. There is a kind of inorganic solid clearance, clearance as alumina coatings is a kind of inorganic solid clearance; ( 3) The cathode active material is mainly refers to graphite, the structure of the lithium titanate or similar graphite carbon materials. Fluid is generally used in 7 - conductive collection 15 microns thickness of copper foil; ( 4) Usually organic electrolyte system, such as six fluoride phosphate lithium carbonate solvent dissolved, some polymer batteries using a gel electrolyte; ( 5) Battery shell is mainly divided into the mantle ( Steel shell, aluminum, nickel plated steel casing, etc. ) And soft shell ( Lu: su film) 。 When batteries, lithium ion embedded isolated from the anode and the cathode, and vice versa. This requires embedding electrodes in lithium before assembly. Generally choose potential is greater than 3 v and embedded in air stable transition metal oxides as positive, such as LiCoO2, LiNiO2, LiMn2O4. - Material, the potential of lithium compounds can be embedded as close as possible to the potential of lithium, such as all kinds of carbon materials, including natural graphite, graphite, carbon fiber, the central stage of carbon particles and metal oxides, including SnO, SnO2, tin composite oxide SnBxPyOz ( x = 0。 4 to 0. 6, y = 0. 6 ~ 0. 4, z = x + 5 y ( 2 + 3) / 2) 。 In order to LiPF6 ethylene carbonate ( EC) And propylene carbonate ( PC) Low viscosity and diethyl carbonate ( 12月) As the electrolyte. Polyene microporous membrane, such as polyethylene, polypropylene, or their composite membrane for the diaphragm. Especially the PP/PE/PP three-layer diaphragm has lower melting point and high durability, thermal safety effect. The outer steel or aluminum, shell assembly has explosion-proof power function.
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