Lithium carbonateis used internary lithium batteries. Currently, the batteries commonly used in new energy vehicles are mainly lithium-ion power batteries, which can be divided into two categories: ternary lithium-ion batteries and lithium iron phosphate batteries. The main lithium raw materials of NCM ternary cathode materials are lithium carbonate and lithium hydroxide. In 2020, approximately 62% of lithium carbonate was used in lithium-ion batteries, including 18.5% in lithium iron phosphate batteries and 44% in ternary batteries.
Uses of Lithium Carbonate:
Lithium carbonate can be used in the manufacture of lithium compounds, enamel and glass. It is a raw material for the preparation of lithium. compounds and metallic lithium. Additif of electrolytic bath for the melting of aluminum. It is widely used in glass, ceramics, medicine and food industries, and can also be used in synthetic rubber, dyes, semiconductors, military and defense industries, televisions , atomic energy, medicine, catalysts, etc. Used to produce acoustic grade single crystals and optical grade single crystals. It can also be used to treat manic psychosis and to make sedatives.
Battery grade lithium carbonate is mainly used to prepare cathode materials of lithium-ion batteries such as lithium cobalt oxide, lithium manganate, ternary materials and iron phosphate and lithium.
High purity lithium carbonate is mainly used to prepare high-end lithium-ion battery cathode materials and fbattery grade lithium fluoride; in terms of optoelectronic information, high purity lithium carbonate is used to prepare lithium tantalate; and niobate; at the same time, high purity lithium carbonate is also used in optical special glass, magnetic materials industry, supercapacitors, pharmaceutical industry, etc.
Ternary lithium battery materials do not include
materials and performance, as requested by electronic enthusiasts.
1. Material comparison, lithium manganate battery, the positive electrode material is lithium manganate LiMn2O4, and the negative electrode material is graphite. Ternary lithium battery, the positive electrode material is ternary nickel-cobalt-manganese NMC material, NiMnCo, and the negative electrode material is graphite.
2. Comparison of performance, densityenergy. The energy density of ternary lithium batteries is generally higher than that of lithium manganate batteries, which means that under the same weight, ternary lithium batteries can store more energy. Lifetime. The life of lithium manganate batteries is generally long, reaching more than 3,000 times, while the life of ternary lithium batteries is relatively short, generally around 1,500 times. Thermal stability. Lithium-manganate batteries have poor thermal stability and are prone to thermal runaway. The thermal stability of ternary lithium batteries is relatively good, but it still requires a good thermal management system.
The ternary materials of ternary lithium batteries do not contain calcium carbonate.
Ternary lithium polymer battery refers to a lithium batteryithium with a ternary cathode material using lithium-nickel-cobalt manganate or lithium-nickel-cobalt aluminate as the cathode material. The ternary composite cathode material is based on nickel salt. , cobalt salt and manganese salt are used as raw materials, and the proportion of nickel, cobalt and manganese can be adjusted according to actual needs.
Batteries using ternary materials as positive electrodes are relatively Lithium cobalt oxide batteries are very safe, but the voltage is too low when used on mobile phones (the cut-off voltage of mobile phones is generally around 3.0V), there will be an obvious feeling of insufficient capacity. Lithium-ion batteries are chemical batteries that use lithium as a negative active material.
Lithium has the most negative standard electrode potential, density splightest ecific among metals and highest reactivity. Therefore, the electromotive force and specific energy of lithium batteries are very high, and this is an important high level. energy battery. The positive active materials of lithium batteries include inorganic electrode materials such as oxides, sulfides, halides, halogens and oxygen-containing acid salts.
The non-aqueous electrolyte solution is composed of an organic solvent or a non-aqueous inorganic solvent plus inorganic salts. The organic solvents used mainly include propylene carbonate, dimethylpropionamide, acetonitrile, γ-butyrolactone, etc. Non-aqueous inorganic solvents include thionyl chloride, liquid sulfur dioxide, etc. Inorganic salts include lithium perchlorate, lithium aluminum chloride, lithium fluoroborate,lithium bromide, etc.
Application in the field of electric vehicles
In the context of “mileage anxiety” and “travel anxiety autonomy” of the industry, long battery life has become a goal of the new energy vehicle industry The number one task to overcome. There are currently two main technical routes to solve this problem, namely ternary lithium polymer batteries and lithium iron phosphate batteries. Among them, lithium iron phosphate batteries are the research direction of BYD Auto. At first, they were due to their low energy density and poor performance at low temperatures.
It is rarely used, but after improvements, it has now exceeded the energy density limit of traditional lithium iron phosphate batteries and reached the level of ternary materials. Batteries in bedhium nickel-cobalt-manganese ternary polymer have a high energy density and are currently the most widely used. However, their cost is high if a breakthrough in security can be achieved, they will still dominate the market in the future.