1. How are lithium-ion batteries classified?

Lithium ion batteries are roughly divided into lithium ion batteries and lithium metal batteries, among which the lithium metal batteries were first developed by Gilbert N Lewis put forward and studied it in 1912, but due to the very active chemical characteristics of lithium metal, the production and use of lithium metal have high environmental requirements, such as easy to cause safety accidents such as explosion, so lithium metal batteries are difficult to be commercially applied;

The lithium-ion battery was invented and manufactured by Exxon only in 1970. Due to the diversification of lithium-ion battery production materials and the reduction of production costs, and after many years of safety testing, Sony finally introduced the first commercial lithium-ion battery in 1991, which revolutionized the appearance of consumer electronics and gradually applied it to energy storage power systems, uninterruptible power supplies for post and telecommunications, electric tools, military equipment Aerospace and other emerging fields, especially electric vehicles, are most familiar to everyone.

2. What is the technical principle of lithium ion battery?

Lithium ion battery is a battery which uses lithium metal or lithium alloy as cathode material and non-aqueous electrolyte solution. Lithium metal battery uses manganese dioxide as cathode material, metal lithium or lithium alloy as cathode material and non-aqueous electrolyte solution as cathode material. Its discharge reaction formula is Li+MnO2=LiMnO2;

Lithium ion batteries use lithium alloy based oxides as cathode materials, graphite as cathode materials, and non-aqueous electrolyte solutions. When charging, the positive reaction formula is LiCoO2==Li (1-x) CoO2+XLi++Xe - (electron), the negative reaction formula is 6C+XLi++Xe -=LixC6, and the total reaction formula of rechargeable batteries is LiCoO2+6C=Li (1-x) CoO2+LixC6;

The production cost of lithium ion battery mainly comes from four parts: cathode material, cathode material, diaphragm and electrolyte, of which the cost of cathode material reaches 30%, as shown in the figure below:

3. What are the advantages of lithium ion batteries?

Lithium ion batteries have been widely used in commerce due to such factors as good battery performance, high environmental adaptability and environmental protection. Among them, the good performance of batteries is reflected in the high energy storage density, which is about 6 times of that of lead-acid batteries, while its weight is only one sixth of that of lead-acid batteries, and the battery cycle life can reach more than 6 years; Its high environmental adaptability is reflected in its high power bearing capacity, low temperature resistance and low self discharge probability, which greatly extends the range and field of use of batteries; Its green environmental protection is reflected in the production, use and scrap process of lithium-ion batteries, which do not contain or appear any harmful metal elements and substances such as lead, mercury, cadmium;