source:other news release time:2023-03-13 Hits: Popular:Lithium-ion battery wholesale
In the early research of lithium-ion batteries, metal lithium was mainly used as the negative electrode. However, during the charging process, lithium precipitation occurred on the surface of the negative electrode, which eventually led to battery short circuit and caused safety problems. The application of lithium intercalation compounds in the negative electrode is the key to the successful commercialization of lithium ion batteries. At present, carbon anode materials are more mature.
Carbon anode materials mainly include graphite, graphitized materials and amorphous carbon materials. Graphite material is the earliest commercialized lithium-ion anode material, including natural graphite and artificial graphite. The carbon atoms are bonded by SP2 hybrid orbital, arranged in hexagonal shape, and extended in two-dimensional direction. The layers are combined by van der Waals force to form layered microcrystalline structure. At room temperature, lithium can be embedded into every six carbon atoms in pure graphite materials. The theoretical expression is LiCs, and the theoretical capacity is 372mAh/g. The interlayer spacing of graphite after lithium intercalation increased from 0.335 nm to 0.370 nm.
The degree of graphitization of carbon materials, also known as the degree of order, will affect the actual lithium intercalation capacity of materials. Table 1-1 shows the crystallinity and actual lithium intercalation capacity of several graphite materials. Among them, the specific capacity and crystallinity of natural graphite are higher than those of the three artificial graphite materials in the table, but the capacity retention rate and cost of natural graphite materials are not as high as that of artificial graphite. In addition, the particle size, specific surface area and surface functional groups of graphite materials also affect the electrochemical properties of graphite materials.
Amorphous carbon materials mainly include hard carbon 1] and soft carbon [], which have high specific capacity. However, during the first lithium intercalation process, there is a large irreversible capacity loss, which limits its commercial application.
Among non-carbon materials, metal oxide materials, silicon-based materials, alloy materials and metal sulfide materials are mainly studied at present.
Read recommendations:
dual purpose marine battery wholesale
14650 Lithium Ion Battery for Electric Toothbrush
How to Choose a Home Battery Backup System?
Lithium iron phosphate battery advantage.lithium power station Manufacturing
Last article:High capacity battery.marine battery for trolling motor
Next article:Cathode material of lithium ion battery.12 volt deep cycle marine battery
related suggestion
portable power station 1000w
2023-04-07dual purpose marine battery manufacturer
2023-03-20deep cycle marine battery Production
2023-03-20lithium deep cycle marine battery wholesaler
2023-03-22solar energy storage batteries Factory
2023-03-20solar power storage direct sales
2023-03-20solar backup generator
2023-05-08portable solar power station
2023-05-08whole house solar generator
2023-05-08portable power station for camping
2023-05-08portable solar power generator
2023-05-08best power station
2023-05-08Customizable LiFePo4 Battery for AGV Robot 60V 72V
2023-02-09Forklift Battery 12V 150Ah
2022-09-193kw solar portable power station 110v 220v 3000w inverter lifepo4 battery fast charging ups convenie
2023-04-12Lithium Ion Battery 18650 Pack 11.1V 12V 2000mAh 3000mAh
2023-02-0951.2V 65Ah LiFePo4 Battery Pack IP65 Waterproof for Golf Cart
2022-09-09Monocrystalline silicon battery.lithium battery 12v 100ah
2023-07-07Why does the lithium iron phosphate battery be swollen?
2022-10-10Which is better for ternary lithium batteries and lithium iron phosphate batteries, and which cycle
2023-04-12Performance characteristics of nickel hydrogen battery
2023-02-01What is the length of alien battery?best batteries for solar power storage
2023-05-24Characteristics of fast-charging lithium polymer battery
2023-02-21What are the advantages of lithium iron phosphate battery
2022-11-16Portable UPS energy storage power supply application field
2023-02-11What is the reason for the expansion of soft pack polymer batteries during use?home solar battery sy
2023-08-22What are the functions of BMS?
2023-03-03