Electrolyte decomposition
When the cathode material comes into contact with the electrolyte, some components in the electrolyte may cause decomposition of the cathode material. This will lead to the structural damage of the cathode material, and then affect the efficiency and life of the battery.
Corrosion and oxidation
Cathode materials may react with some substances in electrolyte, leading to corrosion and oxidation. This will cause the surface of the cathode material to become uneven or form oxides, thus weakening the performance of the battery.
Electrolyte permeation
Cathode material can absorb electrolyte, resulting in its volume expansion or structural change. This will increase the internal stress of the battery and adversely affect the performance and life of the battery.
Battery aging
Long-term contact with cathode materials may lead to battery aging. The structure and performance of cathode materials may change with time, resulting in the decrease of battery capacity and cycle life.
Measures taken by battery manufacturers
In order to reduce these potential risks, battery manufacturers will take a series of measures, such as selecting stable cathode materials, optimizing electrolyte formula, improving battery design, etc., to improve battery stability and life.
Correct use and storage of lithium batteries
In addition to the measures taken by manufacturers, the correct use and storage of lithium batteries is also the key to ensure the battery life. Users should follow the instructions of the battery to avoid excessive charge and discharge, high temperature environment and mechanical damage.