Lithium-ion batteries are a type of battery that uses lithium metal or lithium alloys as the positive/negative electrode materials and a non-aqueous electrolyte solution. Due to the highly reactive chemical properties of lithium metal, its processing, storage, and use require very strict environmental control. With the development of science and technology, lithium-ion batteries have become the mainstream technology.
I. What are the main components of lithium battery materials?
Carbon anode materials: The anode materials actually used in lithium-ion batteries are basically carbon materials, such as artificial graphite, natural graphite, mesophase carbon microspheres, petroleum coke, carbon fiber, pyrolytic resin carbon, etc.
Tin-based anode materials: Tin-based anode materials can be divided into two types: tin oxides and tin-based composite oxides. Oxides refer to oxides of metallic tin in various valence states. There are no commercially available products.
Nitrogen compounds: No commercially available products.
Alloys: These include tin-based alloys, silicon-based alloys, germanium-based alloys, aluminum-based alloys, antimony-based alloys, magnesium-based alloys, and other alloys, none of which are commercially available.
Nanoscale: carbon nanotubes, nanoalloy materials.
Nano-oxides: According to the latest market development trends in the lithium battery new energy industry in 2009, many companies have begun to use nano-titanium oxide and nano-silicon oxide to add to the traditional graphite, tin oxide and carbon nanotubes, which greatly improves the charge and discharge capacity and charge and discharge cycles of lithium batteries.
II. The Four Main Materials of Lithium Batteries
The main components of lithium battery materials include positive electrode materials, negative electrode materials, separators, and electrolytes.
1. Cathode Materials: Among lithium battery cathode materials, the most commonly used materials are lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate, and ternary materials (polymers of nickel, cobalt, and manganese).
2. Anode Materials: Currently, lithium-ion battery anode materials mainly consist of natural graphite and artificial graphite. Anode materials under investigation include nitrides, PAS, tin-based oxides, tin alloys, nano-anode materials, and other intermetallic compounds.
3. Separator: The commercially available separator materials are mainly polyolefin separators, primarily made of polyethylene (PE) and polypropylene (PP). In the structure of a lithium battery, the separator is one of the key internal components.
4. Electrolyte: The electrolyte is prepared by mixing high-purity organic solvents, lithium electrolyte salts, necessary additives and other raw materials under certain conditions and in a certain proportion.
