In ternary material batteries, cobalt can stabilize the layered structure of the material and improve the cycle and flow performance of the material. Nickel can increase the volumetric energy density of materials. Manganese can reduce material costs, improve material safety and structural stability.
Battery with nickel-cobalt-manganese ternary battery material because the positive electrode is safer than lithium cobalt oxide battery, but the platform is too low, which will cause obvious problems when using on mobile phones (the cut-off voltage of mobile phones is generally around 3.4V) The feeling of insufficient capacity is that batteries made of ternary materials are already used in some phones copycat mobiles, especially relatively high capacity batteries.
Detailed informationThe conventional material of battery cathode is lithium cobalt oxide LiCoO2, and the ternary material is lithium nickel cobalt manganate Li (NiCoMn) O2.
The precursor product of ternary composite cathode material is composed of nickel salt, cobalt salt and manganese salt as raw materials. The proportion of nickel, cobalt and manganese can be adjusted according to actual needs. The capacity of lithium iron phosphate is low and is not suitable for lithium iron phosphate. Suitable to meet the needs of high capacity mobile phone battery.
Baidu Encyclopedia-Nickel, cobalt and manganese ternary battery materials
Three freezing points of lithium-ion batteries
“Ternary material” refers to a material as a whole composed of three chemical components (elements), composants (elements and compounds) or parts (parts), including alloys, non-metallic inorganic materials, organic materials, polymer composite materials, etc., are widely used in mineral extraction, metal smelting, materials processing, new energy and other industries.
Cathode material: The cathode material of the lithium cobalt oxide battery is lithium cobalt oxide LiCoO2, and the ternary material is lithium nickel manganate -cobalt Li(NiCoMn)O2. The precursor product of the ternary composite cathode material is based on. Nickel salt, cobalt salt and manganese salt are used as raw materials. The proportion of nickel, cobalt and manganese can be adjusted according to actual needs. Batteries with ternary materials as the positive electrode are safer than lithium and cobalt oxide batteries. Cobalt oxide andTernary materials are good cathode materials for lithium batteries, but their chemical properties are different. Therefore, their application areas are also different depending on their different chemical properties.
Applicable scope of application is: power bank, small electric type
Product features: low cost, high gram capacity (>150mAh/g), voltage of operation corresponding to the existing electrolyte (4.1V), with good safety and lower platform than lithium cobalt oxide and lithium manganate, but considering its comprehensive properties such as compaction and gram capacity, its application prospects are very good. The common nickel-cobalt-manganese ratio is 424/333/523/701515; the 1C gram capacity tested by the samples provided by Henan Siwei is 145/147/155/165; the compaction used in the workshop ist of 3.4/3.5/3.3; /3.2;three The biggest obstacle to the use of mobile phone batteries in China is the so-called discharge platform. The old view is that the time when 4.2V is reduced to 3.6V is when the cell phone works. time, in fact many cell phones turn off at 3.3 or even 3.0V .
There is no platform in Japan and South Korea that says that compared with lithium cobalt oxide, the energy density of ternary needs to be improved. Japan mentioned that it is almost the same as lithium cobalt oxide, ie. , the compaction of the Japanese ternary is close to that of cobalt acid. For lithium, there is still a gap between domestic products. If compaction is increased, ternary will replace lithium cobalt oxide due to cost and safety benefits.
Anode materials: batt anode materialslithium-ion series, such as "Silicon Nanowire/Super-P/Polyaniline" and "Silicon Nanoparticles/Carbon Nanotubes/Polypyrrole" are ternary anode composite materials. In June 2013, "Nano Communications" published a paper titled "Three-dimensional hierarchical ternary nanostructures for high-performance Li-Ion battery anodes" [1]?, which used synthetic P-polypyrrole to wrap silicon nanoparticles and use nanotubes single-wall carbon. are used as electrical intensifiers to significantly improve electrochemical cycle stability and flow performance. In addition, their low cost, high efficiency and good compatibility with industrial processes have attracted wide attention.
The freezing point of ternary lithium battery is ?150~?20℃. Ternary polymer lithium battery refers to a lithium battery that uses ternary cathode materiallithium nickel cobalt manganate (Li(NiCoMn)O2) as cathode material. The precursor product of ternary composite cathode material is composed of nickel salt, cobalt salt and manganese salt. as raw materials.