Time： 2018-06-28 09:12:31
Lithium battery comparison
A"lithium battery" is a type of battery that uses a lithium metal or alithium alloy as a negative electrode material and uses a non-aqueouselectrolyte solution. In 1912, lithium metal batteries were first proposed and studied by Gilbert N. Lewis. In the 1970s, M.S. Whittingham proposed and began to study lithium-ion batteries. Becausethe chemical properties of lithium metal are very lively, theprocessing, preservation, and use of lithium metal require very highenvironmental requirements. Therefore, lithium batteries have not been applied for a long time. With the development of science and technology, lithium batteries have now become mainstream.
Lithium batteries can be roughly divided into two types: lithium metal batteries and lithium ion batteries. Lithium-ion batteries do not contain metallic lithium and are rechargeable. Thefifth generation lithium battery of rechargeable battery was born in1996, and its safety, specific capacity, self-discharge rate andperformance-cost ratio are better than lithium-ion batteries. Because of its own high-tech requirements, companies in only a few countries are now producing such lithium metal batteries.
Asa lithium ion battery anode material, lithium titanate, a lithium ionsecondary battery of 2.4V or 1.9V can be formed with a positiveelectrode material such as lithium manganate, a ternary material, orlithium iron oxide.
Inaddition, it can also be used as a positive electrode, lithiumsecondary battery composed of lithium metal or lithium alloy negativeelectrode of 1.5V.
Due to its high safety, high stability, long life, and environmental friendliness, lithium titanate features.
Itis foreseeable that lithium titanate material will be used as anegative electrode material for new generation lithium ion batteriesafter 2-3 years, and it is widely used in new energy automobiles...
Yuan Li has a large capacity, but its safety is not very good and the low-temperature performance is not very good. The charge and discharge current is not very great. Moreover,the domestic quality is not very good, and the number of cycles is notas large as the theory. However, the quantity is large, and variouscharging and protection boards are relatively mature. Lithium titanate has a smaller relative capacity. Mainly the monomer voltage is a bit low, but the discharge charge performance is good, and it can be charged quickly. Large current discharge, cycle times are also quite good, low temperature discharge is also very good. However, the price is a little expensive. protection...
Ourcurrent lithium battery, according to scientific name, should be calleda lithium secondary battery, and there is a corresponding negativeelectrode material. Unlike a lithium primary battery, a primary batteryuses lithium as another electrode. Such batteries generally use a liquidelectrolyte. Mainlybased on LiPF6, LiClO4 dissolved in DMC: EC (v:v = 1:1) electrolyte,and some of them have been modified, but still liquid batteries. Polymerlithium batteries, from the perspective of the internal material of thebattery, the main internal electrolyte is the use of polymers, here aregenerally gel electrolytes and solid electrolytes, if not mistaken,Koreans have published PEO-ionic liquid electrolyte The gel-like battery, I do not know whether such a battery is used in the Galaxy Round or LGGFlex. Ofcourse, lithium batteries are all-solid-state electrolytes such asLiPON, NASICON, perovskite, and LiSICON, which have high-conductivityceramic electrolytes or glass electrolytes made of amorphous materials.If they are to be classified, they may be classified as lithiumsecondary batteries. However, this is already an extension of the concept. Secondly,lithium polymer battery packs are slightly different in terms ofpackaging. Lithium batteries are typically steel (18650 or buttoned2320), while lithium polymer batteries are packaged in aluminum-plasticpackaging films, ie, soft pack batteries.
Differentprinciples, first said lithium batteries and lithium-ion batteries(polymers are also lithium-ion batteries), the electrolyte is liquid,the polymer battery electrolyte is a gel or solid, more secure.
Lithiumbatteries generally include metal lithium batteries (commonly used asbutton batteries) and lithium ion batteries (also known as lithiumbatteries). Lithium-ion batteries include liquid lithium-ion batteries(usually lithium-ion batteries) and polymer lithium-ion batteries. TypicalCharacteristics of Various Lithium Batteries Lithium metal batteries:Lithium is present in the battery in the form of metal Lithium-ionbatteries: Lithium is present in the battery in the form of lithium ions(usually lithium salt) Liquid Li-ion batteries: Electrolyte is liquidpolymerized Lithium(ion) battery: The electrolyte is in the gel state or in the solidstate because the encapsulation material of the polymer lithium ionbattery is basically an aluminum plastic film (soft bag), and thepackaging material of the liquid lithium ion battery is a metal steelshell or an aluminum shell. Therefore,there is a misunderstanding in the current market. Lithium batteriesfor flexible packaging are polymer lithium batteries. Actually, most ofthe soft batteries manufactured by domestic manufacturers are still usedas liquid electrolytes. They do not belong to lithium polymer batteriesand are truly lithium polymer batteries. There are not many manufacturers.
Thereis no difference in the actual use of the three, battery voltage can bedirectly replaced, and there is indeed a difference in the academicview, the earliest lithium battery is used as a negative battery oflithium, appeared earlier, and there are applications. Lithium-thionylchloride battery is a representative, but is a battery, can not chargeand discharge, lithium-ion battery is commercialized about the end ofthe 1990s, its positive is oxide, the negative is charcoal. Thepolymer battery can be seen as an upgraded version of the lithiumbattery, but the former electrolyte is replaced with a polymerelectrolyte. Another upgrade is where the battery case material ischanged from metal to plastic. This has the advantage of reducing the The battery's own weight increases the battery weight ratio energy index. Infact, these three kinds of batteries can be said to be lithium-ionbatteries, because it is lithium ions in the charging and dischargingprocess between the positive and negative poles and back and forthmigration, but with lithium metal as the motor is more dangerous, proneto accidents. Therefore,secondary batteries do not use lithium directly as electrodes, and thecost of polymers is high. One of my classmates told me that many of theso-called polymer batteries are now soft-packed, but the materials arestill the materials used in traditional lithium-ion batteries.
First of all, the lithium battery refers to a very broad category, and any lithium material can be called a lithium battery. It roughly includes two categories: rechargeable and non-rechargeable. Amongthem, non-rechargeable are: CR series button batteries; AA size lithiumiron batteries; Special custom specifications of thionyl lithiumbatteries. Secondly,lithium-ion batteries are only rechargeable sub-categories in thelithium battery category. This type of battery is also very large, andis the most widely used commercial rechargeable battery, from mobilephones, cameras, power tools, to Tesla cars. This kind of battery. Finally, lithium polymer batteries can be considered as one of the lithium-ion batteries, or upgrades. Itscharacteristic is that there is no cylindrical steel shell on theoutside of the polymer electrolyte, instead of a soft package material,it can be made into a variety of built-in shapes.