The birth and principle of the polymer lithium battery

1. The birth and principle of the polymer lithium-ion battery

Lithium-ion polymer batteries were introduced in 1994 and use a gel polymer electrolyte, a concept originally developed by Bellcore. Later, Japan's SONY, South Korea's Samsung and other companies developed a new structural gel polymer lithium-ion battery on this basis and put it into production around 2000. At present, the principle of lithium-ion batteries and the electrochemical reaction in the charging and discharging process are basically the same as that of liquid lithium-ion batteries, but the gel polymer electrolyte is used.

2. Characteristics of Polymer Li-ion Batteries

Based on lithium-ion batteries, polymer lithium-ion batteries have the following characteristics in addition to those of lithium-ion batteries:

Plastic elasticity is good, can be made into various shapes of batteries;

Safe and reliable, not easy to burn;

(3) Long cycle life and low capacity loss;

(4) High volume utilisation, up to 10%~20% compared to liquid lithium-ion batteries;

Large batteries can be made without series connection;

6. Do not use traditional membrane materials;

(7) Easy to large-scale industrial production;

Today, we are applying it to a wider range of areas.

It is possible to use lithium metal as the negative electrode material of an all-solid polymer lithium-ion battery.

3. Development and types of lithium-ion batteries

Now, China has been able to produce polymer lithium-ion batteries, but it is important to improve on the basis of liquid lithium-ion batteries, and Japanese companies some different types of gel polymer lithium-ion batteries, in a way, can only say half (quasi-) gel polymer lithium-ion batteries, some flexible packaging can also be said to be liquid lithium-ion batteries. Therefore, the improvement of polymer lithium-ion battery technology in China also requires continuous efforts and cooperation between industry and academia.

According to the January 2005 issue of Futurist, High-Power Power Group is one of the top ten innovative products in the next 10 years, and High-Power Power Group is the first company to introduce advanced batteries. Therefore, the development of polymer lithium-ion batteries will greatly promote the further development of high-power power generation groups and preparation technology and related materials, energy density and performance will continue to improve, therefore, we must attach great importance to research and development in this field in order to be invincible.

4. Structure of polymer lithium-ion battery

The structure of polymer lithium-ion battery is the same as that of lithium-ion battery and nickel-metal hydride battery, etc., which generally includes the following components: positive electrode, negative electrode, electrolyte, positive lead, negative lead, etc.