Internal structure of lithium ion battery

The mobile phone battery consists of three parts: the battery core, the protection circuit and the outer casing. The current mobile phone battery is always a lithium-ion battery (often referred to as a lithium battery in the case of non-standard). A lithium-ion battery is a rechargeable battery that relies on lithium ions to move between the positive and negative electrodes to work. During charge and discharge, Li+ is intercalated and deintercalated between the two electrodes: when charging the battery, Li+ is deintercalated from the positive electrode, and the electrolyte is embedded in the negative electrode, and the negative electrode is in a lithium-rich state; A battery containing a lithium element as a electrode is generally used. It is representative of modern high performance batteries.
First, the history of lithium-ion batteries

Second, the electrochemical reaction of lithium-ion batteries

The reversible reaction mode of the so-called lithium ion battery is a cradle reaction. Lithium ion Li+ runs from the positive electrode through the diaphragm to the negative electrode during charging. Discharge is the opposite. This "swing" forms the basic mechanism of a rechargeable lithium-ion battery.
Third, the advantages and disadvantages of lithium-ion batteries

Fourth, the history of polymer lithium-ion batteries