Lithium battery is good or polymer lithium ion battery is good

1. The fundamental difference is raw materials

This 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. Shaping difference

The polymer battery can be thinned, arbitrarily aread and arbitrarily shaped, because the electrolyte can be solid state colloidal rather than liquid, and the lithium battery uses an electrolyte, requiring a strong outer casing as a secondary package to accommodate the electrolyte. Therefore, this also increases the weight of the lithium battery.

3. Security aspects

The current polymers are mostly soft-packed batteries, which are 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 naturally broken. 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. Battery voltage

Since the polymer battery is made of a polymer material, it can be made into a multi-layer combination in the battery cell to achieve a high voltage, and the lithium battery cell has a nominal capacity of 3.6V. To achieve a high voltage in practical use, it is necessary to the cells are connected in series to form the 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, and currently 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 polymer batteries has not been effectively improved, and it has been reduced compared to standard capacity lithium batteries.

7. Manufacturing process

The thinner the polymer battery is, the better is the production. The thicker the lithium battery is, the better is the production, which makes the lithium battery more expandable in the field of application.

8. The price

This is a key factor in 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.

1. Good safety performance

The polymer lithium battery is made of aluminum-plastic flexible packaging, which is different from the metal casing of the liquid battery. Once the safety hazard occurs, the liquid battery is easy to explode, and the polymer battery can only be air-blasted at most.

2. Small thickness, can be made thinner

Ultra-thin, the battery can be assembled into a credit card. Ordinary liquid lithium battery adopts the method of customizing the outer casing first, and then plugging the positive and negative materials. The thickness is 3.6mm or less, there is a technical bottleneck. The polymer battery core does not have this problem, and the thickness can be less than 1mm, which meets the needs of current mobile phones direction.

3. Light weight

A battery using a polymer electrolyte does not require a metal shell as a protective outer package. The weight of the polymer battery is 40% lighter than the steel shell lithium battery of the same capacity specification, which is 20% lighter than the aluminum shell battery.

4. Large capacity

The polymer battery has a capacity of 10-15% higher than that of the same size steel shell battery, which is 5-10% higher than that of the aluminum shell battery. It is the first choice for color screen mobile phones and MMS mobile phones. Nowadays, the new color screen and MMS mobile phones on the market are mostly used polymer batteries.

5. Small internal resistance

The internal resistance of the polymer battery core is smaller than that of the general liquid battery. At present, the internal resistance of the domestic polymer battery core can even be less than 35mΩ, which greatly reduces the self-consumption of the battery and prolongs the standby time of the mobile phone the level of integration with the international. This polymer lithium battery that supports large discharge currents is an ideal choice for remote control models and is the most promising alternative to nickel-metal hydride batteries.

6. Shape can be customized

Manufacturers are not limited to standard shapes and can be economically made to the right size. Polymer batteries can increase or decrease the thickness of batteries according to customers' needs. Develop new battery models, which are cheap, open cycle is short, and some can even be customized according to the shape of mobile phones to make full use of battery casing space and upgrade batteries capacity.

7. Good discharge characteristics

The polymer battery uses a colloidal electrolyte, which has a smooth discharge characteristic and a higher discharge platform than a liquid electrolyte.

8. The protection board is simple in design

Due to the use of polymer materials, the battery core does not ignite or explode, and the battery core itself has sufficient safety. Therefore, the protective circuit design of the polymer battery can be omitted by omitting the PTC and the fuse, thereby saving battery cost.

Second, the disadvantages:

1. Energy density and cycle times are reduced compared to lithium ion batteries.

2. Manufacturing is expensive.

3. There is no standard shape, and most batteries are manufactured for the high-capacity consumer market.

4. Compared with lithium-ion battery, the price and energy are relatively high.

The page contains the contents of the machine translation.