news

Company News Industry News

Characteristics and advantages of polymer lithium batteries

Time:2021-01-12 Views:291

  The three elements of a general battery: positive electrode, negative electrode and electrolyte. The so-called polymer lithium battery refers to a battery system in which at least one or more of the three elements uses polymer materials. In lithium polymer battery systems, most polymer materials are used in the positive electrode and electrolyte. The positive electrode material uses conductive polymer or inorganic compounds used in general lithium ion batteries, the negative electrode often uses lithium metal or lithium-carbon intercalation compounds, and the electrolyte uses solid or colloidal polymer electrolytes, or organic electrolytes. Since there is no excess electrolyte in the lithium polymer, it is more reliable and stable.

Characteristics and advantages of polymer lithium batteries

  Polymer lithium battery uses aluminum alloy as the positive electrode, polymer conductive material, polyacetylene, polyaniline or poly-p-phenol as the negative electrode, and organic solvent as the electrolyte. The specific energy of lithium polyaniline battery can reach 350W.h/kg, but the specific power is only 50-60W/kg, the operating temperature is -40-70 degrees, and the life span is about 330 times.

  Compared with lithium ion batteries, the characteristics of polymer lithium batteries are as follows:

  1. The full-charge voltage of the lithium battery is increased to 4.4V, which increases the energy density.

  2. Thin battery can be made: with 3.6V250mAh capacity, its thickness can be as thin as 0.5mm.

  3. The battery can be designed in various shapes.

  4. Can be made into a single high voltage: a liquid electrolyte battery can only obtain a high voltage by connecting several batteries in series, while a polymer battery can be made into a multi-layer combination within a single battery to achieve high voltage because there is no liquid.

  5. The discharge capacity is theoretically 10% higher than a lithium-ion battery of the same size.

  Li-polymer battery (Li-polymer, also known as polymer lithium-ion battery) has many advantages such as high specific energy, miniaturization, ultra-thinness, light weight and high safety. Based on this advantage, the polymer lithium battery can be made into a battery of any shape and capacity to meet the needs of various products; and it uses aluminum-plastic packaging, and internal problems can be immediately manifested through the outer packaging, even if there is a safety hazard , It will not explode, only bulge. In polymer batteries, the electrolyte plays the dual function of the separator and the electrolyte: on the one hand, it separates the positive and negative materials like a diaphragm to prevent self-discharge and short circuit inside the battery. On the other hand, it is in the positive and negative like the electrolyte. Conduct lithium ions between the poles. Polymer electrolyte not only has good conductivity, but also has the characteristics of light weight, good elasticity, and easy film formation that are unique to polymer materials. It also conforms to the development trend of light weight, safety, efficiency and environmental protection of chemical power sources.

  Use advantages

  1. There is no battery leakage problem. The battery does not contain liquid electrolyte and uses colloidal solids.

  2. Thin battery can be made: With 3.6V400mAh capacity, its thickness can be as thin as 0.5mm.

  3. The battery can be designed in various shapes.

  4. The battery can be bent and deformed: the polymer battery can be bent about 90 degrees.

  5. It can be made into a single high voltage: the battery with liquid electrolyte can only obtain high voltage by connecting several batteries in series. Since polymer battery has no liquid itself, it can be made into a multi-layer combination in a single cell to achieve high voltage.

  6. The capacity will be twice as high as a lithium-ion battery of the same size.

Previous Back to list Next

service

phone

message

top