What is a lithium metal battery?

　　What is a lithium metal battery? What is it used for? Lithium metal battery generates electricity through corrosion or oxidation of lithium metal. They will be discarded after use and cannot be charged. Therefore, they are also called primary cells. Lithium ion batteries use the concentration difference of lithium ions for energy storage and discharge. The battery does not contain lithium metal, so it is also called lithium secondary battery. At present, rechargeable lithium-ion batteries used in mobile phones, cameras, electric tools, electric vehicles, energy storage, communication base stations, etc. are all lithium-ion batteries. Generally speaking, the most commonly used and visible lithium-ion battery in the market is the lithium-ion battery, also known as the lithium-ion battery.

　　1. According to the classification of electrode materials, cathode materials: lithium iron phosphate battery (LFP), lithium cobalt oxide battery (LCO), lithium manganate battery (LMO), (binary battery: nickel manganate lithium nickel cobalt oxide), (ternary battery: lithium nickel manganate (NCM), lithium nickel cobalt aluminate (NCA)) cathode materials: lithium titanate battery (LTO) The concept of graphene related to nano carbon fiber battery in the graphene battery market mainly refers to graphene based battery, that is, add graphene slurry on the electrode plate or add graphene coating on the diaphragm. There are basically no lithium niobate and magnesium based batteries on the market.

　　2. According to the product appearance, it can be divided into: cylinder, soft bag and square. Cylindrical and square outer packages are mostly steel shells or aluminum shells. The outer package of the soft bag is aluminum plastic film. In fact, soft bags are also square. In the market, it is usually called aluminum plastic film packaging soft bag, and some people call the soft bag battery polymer battery. For cylindrical lithium-ion batteries, the model is usually 5 digits. The first two are the diameter of the battery, and the middle two are the height of the battery. Unit: mm. For example, the 18650 lithium ion battery has a diameter of 18 mm and a height of 65 mm.

　　3. According to the different electrolyte materials, lithium ion batteries are divided into liquid lithium ion batteries (LIB) and polymer lithium ion batteries (PLB). Liquid lithium ion batteries use liquid electrolytes (most power batteries at present). Polymer lithium ion batteries are replaced by solid polymer electrolytes, which can be either "dry" or "colloidal", and most polymer lithium ion batteries are based on polymer gel electrolytes. For solid state batteries, strictly speaking, this means that both the electrode and electrolyte are solid.

　　4. According to the actual performance of batteries, power batteries and energy batteries are classified. The energy battery has the characteristics of high energy density and is mainly used for high energy output; Power battery has the characteristics of high power density, which is of great significance for instantaneous high power output and battery output. Lithium ion batteries for electric energy emerged with the emergence of plug-in hybrid electric vehicles. It requires that the energy stored in the battery is high, it can support the pure electric driving for a certain distance, and it has good power characteristics to enter the hybrid mode when the battery power is low. In short, the energy type is similar to that of a marathon runner. In order to have durability, it requires high capacity and low requirements for high current discharge performance; Then the dynamic type is a sprinter, who has both explosive power and endurance, otherwise the capacity is too small to run far

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