Which is better, polymer lithium battery or lithium battery?

A lithium polymer battery refers to a lithium ion battery that is all solid or gel is too electrolyte. Aluminum-plastic composite film is generally used as a packaging material. There are currently only two real lithium polymer batteries in the world. One is Japan's SONY, and the other is China's ATL.

A lithium battery generally refers to an aluminum shell battery, the electrolyte is in a liquid state, and the outer packaging material is an aluminum shell,

Lithium polymer batteries are safer than lithium batteries. Lithium polymer batteries are upgraded products of lithium ion batteries. Compared with the current popular lithium-ion battery, it has the advantages of large capacity, small size (thin), and safety (no explosion). However, due to the time required for the replacement of the entire industry chain, its cost (cost) is still relatively high, and it is only used in high-end digital products (ultra-thin notebook computers, etc.).

It is foreseeable that in the next 5-10 years, lithium polymer batteries will replace the existing lithium-ion batteries! In fact, the penetration rate of lithium polymer batteries in countries such as Japan and South Korea, which are relatively developed in the electronics industry, has reached a certain level. However, China is still relatively backward in this respect. Let us wait and see! It is cheaper to use a lithium polymer battery phone in the near future. I must replace this more secure mobile phone (battery)!

Lithium polymer battery (Li-polymer, also known as polymer lithium battery): It has a variety of obvious advantages such as high energy density, smaller size, ultra-thinness, light weight, high safety and low cost. In terms of shape, the lithium polymer battery has an ultra-thinning feature and can be fabricated into a battery of any shape and capacity in accordance with the needs of various products. The battery can reach a minimum thickness of 0.5mm. Compared to lithium-ion batteries, lithium polymer batteries have the following characteristics:

1. No battery leakage problem, the battery does not contain liquid electrolyte inside, and uses colloidal solids.

2. Can be made into a thin battery: with a capacity of 3.6V400mAh, its thickness can be as thin as 0.5mm.

3. The battery can be designed in a variety of shapes.

4. The battery can be bent and deformed: the polymer battery can be bent up to about 90°.

5. A single high-voltage: liquid electrolyte battery can only be connected in series with several batteries to obtain a high voltage, and the polymer battery can be made into a multi-layer combination in a single piece to achieve a high voltage because it has no liquid itself.

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

Lithium polymer battery (Li-polymer, also known as polymer lithium battery): Compared with the previous battery, it is a chemical battery with high energy, miniaturization and weight reduction.

Lithium polymer batteries are in shape, and lithium polymer batteries have ultra-thin characteristics, which can be made into batteries of different shapes and capacities in accordance with the needs of some products. This type of battery has a theoretical minimum thickness of 0.5 mm.

The three elements of a typical battery: the positive electrode, the negative electrode, and the electrolyte. The lithium polymer battery refers to a battery system in which at least one or more of the three elements are made of a polymer material. In lithium polymer battery systems, most of the polymer materials are used on the positive electrode and the electrolyte. The positive electrode material uses a conductive polymer or an inorganic compound used in a general lithium ion battery. The negative electrode is usually a lithium metal or lithium carbon interlayer compound, and the electrolyte is a solid or colloidal polymer electrolyte or an organic electrolyte. Since there is no excess electrolyte in the lithium polymer, it is more reliable and stable.

The battery is mainly lithium as the other pole. These batteries generally use liquid electrolyte. Nowadays, it is mainly based on LiPF6 and LiClO4 dissolved in DMC:EC ('t know if it is used on GalaxyRound or LGGFlex. Of course, there are lithium batteries with all-solid electrolytes such as LiPON, NASICON, Perovskite, LiSICON, such as ceramic electrolytes with high conductivity or amorphous materials. If classified, they should be classified as lithium secondary batteries. But this is already an extension of the concept. Secondly, the lithium polymer battery box lithium battery is slightly different in packaging. The lithium battery is generally a steel shell (18650 or button type 2320), and the lithium polymer battery is packaged with an aluminum plastic packaging film, that is, a soft pack battery.

Lithium batteries usually include metal lithium batteries (commonly used as button batteries) and lithium ion batteries (also known as lithium batteries). Lithium-ion batteries include liquid lithium-ion batteries (usually known as lithium-ion batteries) and polymer lithium-ion batteries. Typical characteristics of various lithium batteries Metal lithium battery: lithium element exists in the form of metal in the battery Lithium ion battery: lithium element exists in the form of lithium ion (usually lithium salt) in the battery Liquid lithium ion battery: electrolyte is liquid polymerization Lithium (ion) battery: The electrolyte is in a gel state or a solid state. The packaging material used in the polymer lithium ion battery is basically an aluminum plastic film (soft package), and the liquid lithium ion battery is made of a metal steel case or an aluminum case. Therefore, there is a misunderstanding in the market. The lithium battery of flexible packaging is a polymer lithium battery. In fact, most of the soft-packed batteries produced by domestic manufacturers are still using liquid electrolytes, which are not polymer lithium batteries, and truly do polymer lithium batteries. There are not many manufacturers.

There is no difference between the three in actual use. The difference in battery voltage can be directly replaced. However, there is a difference in academics. The earliest lithium battery used lithium as the battery negative electrode, which appeared earlier and has applications. Lithium-thionyl chloride battery is a representative, but it is a primary battery, cannot be charged and discharged. Lithium-ion battery is commercialized in the late 1990s. Its positive electrode is oxide and its negative electrode is carbon. A polymer battery can be seen as an upgraded version of a lithium battery, but the previous electrolyte was replaced with a polymer electrolyte. Another upgrade was that the battery case material was changed from metal to plastic. This has the advantage of reducing it. The weight of the battery itself increases the battery weight ratio energy index. In fact, these three kinds of batteries can be said to be lithium-ion batteries, because lithium ions migrate back and forth between the positive and negative electrodes during charging and discharging, but it is dangerous to use metal lithium as a motor, which is prone to accidents. Therefore, the secondary battery does not use lithium directly as the electrode, and the polymer cost is high. One of my classmates told me that many of the so-called polymer batteries are soft-packed, but the materials are still used for traditional lithium-ion batteries.

The concept of lithium batteries includes "lithium ion batteries" and "lithium polymer batteries." Lithium-ion batteries are classified into liquid electrolyte lithium ion batteries and polymer electrolyte lithium ion batteries according to the normal temperature conditions in the electrolyte chamber. A polymer battery refers to an electrolyte that is in a solid or gel state and is "advanced" than a liquid electrolyte used in ordinary lithium ion batteries. In production, the liquid electrolyte is injected into the liquid electrolyte after the core is finished, and the polymer battery is coated before the positive and negative laminates before packaging with aluminum plastic. On the positive and negative electrodes or after the coating, the liquid electrolyte is injected at a temperature slightly above room temperature, and after the room temperature, the electrolyte becomes a gel state (polymer state).

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

Compared to lithium-ion batteries, lithium polymer batteries have the following characteristics:

1. Relatively, the problem of battery leakage is improved, but it has not been completely improved.

2. Can be made into a thin battery: with a capacity of 3.6V250mAh, its thickness can be as thin as 0.5mm.

3. The battery can be designed in a variety of shapes.

4. A single high voltage: liquid electrolyte battery can only be connected in series with several batteries to obtain a high voltage, and the polymer battery can be made into a multi-layer combination in a single piece to achieve a high voltage because it has no liquid itself.

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

Lithium 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 such advantages, the lithium polymer battery can be made into a battery of any shape and capacity to meet the needs of various products; and it is packaged in aluminum plastic, and internal problems can be immediately expressed through the outer package, even if there is a safety hazard It will not explode, it will only bulge. In a polymer battery, the electrolyte functions as a separator and an electrolyte: on the one hand, the positive and negative materials are separated like a diaphragm, so that the battery does not self-discharge and short-circuit inside, and on the other hand, it is positive or negative like an electrolyte. Lithium ions are conducted between the poles. The polymer electrolyte not only has good electrical conductivity, but also has the characteristics of light weight, good elasticity and easy film formation which are peculiar to polymer materials, and also conforms to the development trend of light, safe, efficient and environmentally friendly chemical power sources.