Lithium-ion battery is a kind of high-performance battery, which uses lithium ion as the current carrier, has the advantages of high energy density, high voltage stability and long cycle life. The lithium-ion battery consists of four parts: positive electrode, negative electrode, electrolyte and diaphragm.
Positive electrode : An important part of a lithium-ion battery, usually made of materials containing lithium oxides or elements such as cobalt, nickel, and manganese. Its role is to provide positive ions in order to chemically react with lithium ions on the negative electrode.
Negative electrode : Usually composed of materials of graphite and other carbon compounds, it is used to provide negative ions in order to interact with positive ions in the electrolyte, thereby releasing energy.
Electrolyte : An important component of a lithium-ion battery, usually consisting of a mixture of organic matter and inorganic salts such as hydrochloride or potassium ferricyanide. Its role is to provide a path for ion transport, so that lithium ions can flow between the positive and negative terminals in order to release energy.
Diaphragm : An important part of the lithium-ion battery, its role is to separate the positive and negative terminals, prevent direct contact between them, while also allowing the transfer of ions. This diaphragm is usually made of a polymer material that is highly permeable and resistant to high temperatures.
Lithium batteries can be broadly divided into two categories: lithium metal batteries and lithium ion batteries. The voltage of a single lithium battery is 3.7V (lithium ferrous phosphate positive electrode is 3.2V), and the battery capacity can not be infinite, so the single lithium battery is often processed in series and parallel to meet the requirements of different occasions.
