What are the working characteristics of lithium ternary batteries?

Three-way ion polymerization technology adopts electrostatic adsorption principle and plasma technology. It is an innovative technology for electrostatic dust removal in the market, and it completely solves the problem of excessive ozone of electrostatic dust purifier.

1, non-corona, no ozone. Three-element ion polymerization and purification technology, using DBD abnormal ion release protection, to change the corona process in traditional electrostatic dedusting to prevent ozone from exceeding the standard.

2, let "fine dust grow", capture, adsorption. When the dust in the air passes through a strong electric field ion channel, a large number of carrying electrons do irregular movements, impact the molecules of fine dust particles and charge them, and the opposite charge attracts them to condense to form large particles, under the influence of motion, gravity, and charge. Under the action of positive and negative ion potential energy electric field, it is captured and adsorbed by microporous aggregator when moving to anode or cathode. In the process of ion charge, the electronic structure of bacteria changes, thereby inhibiting the activity of the bacteria and playing a bactericidal role.

In addition, this technology is mostly used in high clean environments such asspecial and medical treatment, and is gradually entering the civilian field. As of 2012, 3.5 million air purifiers have been used worldwide for three-way ion polymerization and purification, of which 45 % of air purifiers in the United States have adopted this technology. In China, the air purifiers of the Mi nationality, the ancient new wind system, and the commercial new wind system in the sky have become the first industry pioneers to adopt this technology.

Three-element polymer lithium battery refers to a lithium battery of a positive electrode material using lithium nickel-cobalt manganese acid(Li(NiCoMn) O2) three-element positive material, and a three-element composite positive material precursor product. Nickel salt, cobalt salt, manganese salt as raw material, The ratio of nickel cobalt manganese inside can be adjusted according to actual needs. The three-element material positive electrode battery has high safety relative to the lithium cobalt acid battery, but the voltage is too low and used on mobile phones(the mobile phone cut-off voltage is generally around 3.0 V). There will be a significant lack of capacity.

Three-element polymer lithium battery refers to a lithium battery using a lithium nickel cobalt manganese ternary positive material for a cathode material. There are many kinds of positive materials for lithium ion batteries, mainly lithium cobalt acid, lithium manganese acid, lithium nickel acid, and ternary materials. lithium iron phosphate and so on. At present, the core of the ternary material replaces the lithium cobalt acid core that has been widely used before and is widely used in the field of notebook batteries.

Nominal capacity: 1250mAh

Standard electrical discharge continuous current: 0.2 C

Maximum continuous discharge current: 1C

Discharge: -10 ~ 60 °C

Product Size: MAX9 .5 * 35 * 52 mm

Internal resistance of finished product: ≤ 150mΩ

Lead type: National Standard Line UL1007/24 #, Line length 55mm

Protection parameter: overcharged protection voltage / 4.325 ± 0.025 V per string

Over discharge protection voltage 2.5 ± 0.05 V

Excess value: 2 ~ 6A or 3-8A

Materials that are more balanced in terms of capacity and safety, have better recycling performance than normal lithium cobalt acid. Due to technical reasons, the nominal voltage in the early stages was only 3.5-3 .6 V, which was limited in the range of use. However, until now, with the continuous improvement of the formula and The structure is perfect, The nominal voltage of the battery has reached 3.7 V, and the capacity has reached or exceeded the level of lithium cobalt oxide batteries.

SANYO, PANASONIC, SONY, LG, and SAMSUNG, the five largest electric core brands in the world, have launched the core of the ternary material. A considerable part of the notebook battery lines have replaced the previous lithium cobalt acid core with the core of the ternary material, SANYO, In the case of the SAMSUNG columnar battery, the manufacture of lithium cobalt acid core to ternary core has been completely discontinued. At present, most of the small high-power power batteries at home and abroad use ternary cathode materials.

Ionic polymers refer to a class of polymers containing metal ions with specific gravity of 0.94 to 0.960. Softening point 35 °C. It can be used continuously at 90 °C in air. The molecular structure is dominated by copolymers of ethylene and methacrylate, on which metal ions are introduced. And ion bonds are used as crosslinking between molecules. Low crystallinity, good transparency. It is full of extensibility and elasticity, and has high tensile strength and impact strength. Polymer weight can be used as a thermoplastic plastic, low molecular weight can be used as a binder and laminate resin. The film and sheet are made of very good insulation. The adhesive can bind metal, glass, paper and plastic.

Ionic polymers are also known as Ionic cross-linked polymers, also known as ionomers. It is a product obtained by cross-linking metal ions(such as sodium, potassium, zinc, magnesium, etc.) on the copolymer backbone of monomers such as ethylene and acrylic acid.

The commonly used ionomers are products obtained by introducing sodium or zinc ions into a copolymer of ethylene and methacrylic acid. The trade name is Surlyn, and the polymer is present due to the presence of ionic bonds in the main chain of the macromolecule. It has the physical properties of cross-linked macromolecules, high strength under normal temperature and high toughness. However, when heated to a certain temperature, the cross-linked chains formed by metal ions can be dissociated without affecting its remelting process, exhibiting thermo plasticity, and after cooling. It can be cross-linked, so it is a high-strength and tough thermoplastic.

Ionic polymers are polymers that contain inter-chain ion bonding. They are usually sodium salts or zinc salts of vinyl methacrylate polymers or vinyl acrylate polymers, and polymerize like LDPE at high temperatures and pressures to form branched chain structures. The structure is shown in the figure below.

Ionic polymer

Ionic polymer

The ionic bond has a reversible cross-linking effect. When heated, the strong attraction between adjacent molecules weakens, causing the material to melt and flow. This bond is re-established when cooled. The amount of acid in the polymer backbone generally ranges from 7% to 30% of its total weight. Not all acids can be neutralized to form salts. Neutralization is generally between 15% and 80%, which has an effect on the physical properties of the ionic polymer. Unneutralized acids provide a place for hydrogen bonding between adjacent molecules. These hydrogen bonds are weaker than the ionic bonds of the salt, but stronger than the ordinary secondary bonds. Increasing the amount of neutralization and neutralization of the acid enhances tensile strength, modulus, toughness, clarity, melt strength, and oil resistance, but reduces melting point and tear resistance. Zinc-based ionic polymers have a wide range of adhesion and low hygroscopicity, while sodium-based ionic polymers have better chemical and grease resistance. [2]

Ionic polymers can also produce ternary copolymers containing acrylic, ethylene and methacrylate. Another Ionic polymer is produced by saponification of vinyl acrylate copolymer, in which all acid groups are completely neutralized with sodium.

Ion polymer has excellent melt strength, clarity, softness, strength and toughness. Even under low temperature conditions, it also shows superior impact performance and penetration resistance. It is an ideal material for making sharp articles skin packaging. Its ability to absorb ultraviolet light increases the heating speed and becomes another advantage for skin packaging. Its viscosity is good, especially after being stained, it still has good thermal sealing performance. It is widely used in vacuum packaging of meat products. Its excellent melt strength makes it suitable for deep compression heat forming.

In addition, other applications of Ionic polymers include cheese, fast food, and pharmaceutical packaging. Acid-neutralized Ionic polymers have excellent aluminum foil adhesion and are often used to extrude hot seals of coated foil structures. [ 2]

The disadvantages of Ionic polymers are: poor gas permeability and easy hygroscopicity, and the cost is relatively higher than PE and EVA.

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