How to distinguish between lithium battery and polymer battery

The concept of lithium batteries is very frequently used. With a little attention, we will find that the concept of using this concept is broad, narrower and narrower. Lithium batteries in a broad sense include lithium primary batteries and lithium ion batteries. Since lithium ion batteries are more widely used than lithium primary batteries, lithium batteries are usually referred to as lithium ion batteries in a narrower sense; there are two types of lithium ion batteries inside: Polymer lithium-ion batteries and liquid lithium-ion batteries, because of the higher quality, the application of more liquid lithium-ion batteries, so the narrow understanding of lithium batteries refers to liquid lithium-ion batteries, and polymer lithium-ion batteries are also called lithium polymers. Batteries, people used to be referred to as polymer batteries. If the difference between a lithium polymer battery and a lithium battery is compared in a broad sense and a narrow sense, then the only relationship between the concept and the concept is that the lithium polymer battery is included in the lithium battery, so that it is of comparative significance. Comparison on a narrow level: a comparison of a polymer battery and a liquid lithium ion battery. Based on this, the following lithium battery is referred to as a liquid lithium ion battery.

1. The fundamental difference is raw materials, which is the total source of the different performances of the two. The polymer battery means that at least one of the three components of the positive electrode, the negative electrode or the electrolyte is a polymer material. Polymer means that the molecular weight is large, and the corresponding concept is a small molecule, which has high strength, high toughness and high elasticity. The polymer battery materials currently developed are mainly used for the positive electrode and the electrolyte. 1, Polymer battery cathode material In addition to the inorganic compound of lithium battery, conductive polymer can also be used; 2, polymer electrolyte has polymer electrolyte (solid or colloidal) and organic electrolyte, lithium battery uses electrolyte (liquid or colloid)

2. In shaping, the polymer battery can be thinned, arbitrarily aread and arbitrarily shaped, because the electrolyte can be solid in a colloidal state rather than a liquid state, and the lithium battery uses an electrolyte and requires a strong outer casing. The electrolyte is contained as a secondary package, and therefore, this also increases the weight of the lithium battery.

3. Safety: The current polymer is mostly a soft-packed battery, which is made of aluminum plastic film. When the organic electrolyte is used inside, even if the liquid is very hot, it will not explode because the aluminum-plastic film polymer battery adopts solid or colloidal state. Without leakage, it only breaks naturally. But nothing is absolute. If the instantaneous current is large enough and a short circuit occurs, it is not impossible for the battery to ignite or burst. The occurrence of safety accidents on mobile phones and tablets is caused by this situation.

4. Cell voltage: Since the polymer battery is made of polymer material, it can be made into a multi-layer combination in the cell to reach a high voltage, while the lithium battery cell has a nominal capacity of 3.6 v. In order to achieve high voltage in practical applications. Then, multiple cells need to be connected in series to form an ideal high-voltage working platform.

If you compare the polymer battery and the lithium battery with the above characteristics, then the conclusion is certain. However, the application of lithium battery in the market is dominant, which indicates that the lithium battery also has a comparative advantage, and we continue to compare.

5. Conductivity: The solid electrolyte of the polymer battery has low ionic conductivity. At present, some additives are added to make it a gel electrolyte to improve the conductivity. This only increases the ionic conductance, and does not maintain a stable value for the conductivity of the lithium battery, and is not affected by the quality of the auxiliary material.

6. Capacity: The capacity of the polymer battery has not been effectively improved, and it has been reduced compared with the standard capacity lithium battery.

7. Manufacturing process: The thinner the polymer battery, the better the production. The thicker the lithium battery, the better the production. This makes the lithium battery more expandable in the application field.

8. Price: This is the key factor determining the market capacity of the two markets. At present, the price of polymer batteries in the market is generally higher than that of lithium batteries, which affects the market capacity of the two. The ratio of the former to the latter is 1:9.

It's hard to say absolutely whether polymer batteries and lithium batteries are good. They have their own merits. If you have to say a conclusion, polymer batteries will be more used in small applications, and lithium batteries are more promising in large-scale applications. Being able to break through the limitations of price and design may represent a battery development trend, as its environmental protection and safety are more in line with the trend.

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 popularity of lithium polymer batteries in countries such as Japan and South Korea, which are more developed in the electronics industry, has reached a certain level. Level, but China is still relatively backward in this respect, let us wait and see! Waiting for the future, the use of lithium polymer battery mobile phones is cheap, 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-thin, light weight, high safety and low cost. battery. 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 0.5 mm. 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 3.6 v400mah, the thickness can be as thin as 0.5 mm.

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 battery that can be made into a single high voltage: liquid electrolyte can only obtain high voltage in series with several batteries, 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

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