Classification and structure of lithium batteries

Lithium batteries can be divided into liquid lithium batteries (LIB) and polymer lithium batteries (PLB) according to the different electrolyte materials used. Lithium battery working environment: high temperature lithium battery, lithium battery at low temperature, normal temperature lithium battery, electrolyte state: liquid lithium battery, gel solid lithium battery, lithium battery, according to the shape: square lithium battery, cylindrical lithium battery, oval According to the packaging form, the lithium batteries are divided into: lithium batteries with rigid shells and lithium batteries with soft-bag shells. The structure of the lithium battery constitutes the electrode is the basic component of the battery. The electrode materials of lithium batteries mainly include: important components: active materials that directly participate in electrochemical reactions. The positive electrode active material of a lithium battery is a lithium salt compound. At present, lithium cobalt acid, lithium manganese acid, lithium nickel acid, ternary (lithium nickel cobalt manganese acid), lithium iron phosphate, etc. have been widely used. Important negative active materials include graphitized carbon materials, amorphous carbon materials, nitrides, silicon-based materials, new alloys and other materials. Secondary component: does not directly participate in the electrode reaction, but can improve the conductivity and production performance of the battery. Importantly, there are collection fluid, adhesive and conductive agent. If the internal material composition can be divided into: chemical materials: lithium cobalt acid (lithium manganese acid, lithium nickel acid, ternary material, lithium iron phosphate), graphite anode (artificial graphite, natural graphite, MCMB, modified natural graphite), Diaphragm, electrolyte, conductive agent (graphite: ks-6, SO; conductive carbon black, such as SuperP, acetylene black, harp, etc.), PVDF (polyvinylidene fluoride, its molecular weight ranges from 300,000 to 600,000, It is the most commonly used anode binder), NMP (N-methylpyrrolidone, a good organic solvent, can dissolve fast PVDF), oxalic acid (used for cleaning and corrosion of copper foil surface, strengthening the adhesion and adhesion between the substrates) Mixture), SBR (styrene butadiene rubber, latex binder, SBR and CMC as a cathode material mixed water-based binder), CMC, sodium carboxymethyl cellulose, pectin, mixed with SBR, used for dispersion and thickening ), PTC (Positive Temperature Coefficient Thermistor, polymer insulation conductivity over a certain temperature) is lower than the temperature, high temperature tape (mechanical and electrical protection of the pole pieces and ears at both ends and as the end zone), copper foil (using electrolytic copper foil , Generally negative fluid, generally single light copper foil oily material, generally water-based double-sided copper foil material), aluminum foil, aluminum foil rolling, positive shaping fluid), etc.; hardware materials: steel shell, aluminum shell, cap, ring , Aluminum belt, nickel belt, aluminum and nickel composite belt. Lithium batteries have high operating voltage, small size, light weight, high energy, no memory effect, no pollution, low self-discharge, and long cycle life. They are the ideal energy source for the 21st century. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Commonly used electric vehicle power lithium battery performance explanation