Classification and structural characteristics of lithium-ion batteries

Classification of lithium ion batteries 1. According to the appearance of lithium ion batteries: square lithium ion batteries (such as commonly used mobile phone battery cells) and cylindrical lithium ion batteries (such as 18650); 2. According to lithium ion battery outsourcing materials : Aluminum shell lithium ion battery, steel shell lithium ion battery, soft pack battery; 3. According to the positive and negative electrode materials (additives) of lithium ion battery: lithium acid (LiCoO2) battery or lithium manganate (LiMn2O), lithium iron phosphate Ion battery (LiFePO4), disposable manganese dioxide lithium ion battery; another classification method: lithium ion LIB, polymer PLB; 4. According to different performance and use aspects: ①disposable lithium ion battery-lithium manganese battery One-by-one button 3 volt battery; ②High-capacity (high-platform) lithium-ion battery is used in mobile phone digital products; ③High-rate lithium-ion battery; one is used in electric vehicles and power tools and aircraft models; ④Type High temperature lithium ion battery; one miner's lamp, indoor lighting, machine built-in backup power; ⑤ low temperature lithium ion battery; one outdoor environment, north (winter) south pole; 5. Lithium ion batteries are also divided into two categories: non-rechargeable and rechargeable There are two types of charging. The so-called lithium ion battery refers to a secondary battery composed of two compounds that can reversibly insert and extract lithium ions as the positive and negative electrodes. People call this kind of lithium ion battery with a unique mechanism that relies on the transfer of lithium ions between the positive and negative electrodes to complete the battery charging and discharging work. The lithium ion battery with a unique mechanism is vividly called the rocking chair battery, commonly known as lithium battery. Take LiCoO2 as an example: (1) When the battery is charged, lithium ions are extracted from the positive electrode and embedded in the negative electrode, and vice versa during discharge. (2) Cathode material: This requires an electrode to be in a lithium-inserted state before assembly. Generally, a lithium-inserting transition metal oxide with a potential greater than 3V relative to lithium and stable in the air is used as the positive electrode, such as LiCoO2, LiNiO2, LiMn204, LiFePO4. (3) Negative electrode material: For the negative electrode material, choose a lithium compound that can be inserted as close as possible to the lithium potential. For example, various carbon materials include natural graphite, synthetic graphite, carbon fiber, mesophase carbon, etc. and metal oxides. The structural characteristics of lithium ion batteries including SnO, SnO, and tin composite oxide SnBxPyOz (xu003d0.4~0.6, yu003d0.6~0.4, zu003d(2+3x+5y)/2) Li-ion batteries generally include: positive electrode (positive), negative (negative), electrolyte (electrolyte), separator (separator), positive lead (positive lead), negative lead (negativeplate), center terminal, insulating material (insulator), safety valve (safetyvent), sealing ring (gasket) ), PTC (positive temperature control terminal), CID (current interrupt device), battery case and electrode lead. Currently, the more commonly used lithium-ion battery materials are lithium phosphate, lithium nickelate and lithium manganate. The most used material is lithium borate, which has good cycle performance and is convenient to manufacture. The disadvantage is that the price of boring compound is more expensive. Lithium nickelate is difficult to manufacture because of its unstable nature. Generally, it is the compound of lithium sulphate doped with nickel, also known as lithium nickel sulphate. Lithium manganate is also a very good material. For many reasons, such as the faster attenuation of lithium manganate at high temperatures, most of the current applications are still in the laboratory stage. The structure of lithium-ion batteries is mainly divided into two categories: winding type and stacked type. Liquid lithium-ion batteries use a winding structure, while polymer lithium-ion batteries have two types. In the winding type, the positive electrode membrane, the separator, and the negative electrode membrane are placed in sequence and wound into a cylindrical or flat cylindrical shape. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What is the difference between polymer lithium batteries and ordinary lithium-ion batteries?