The unit usage of negative electrode materials in lithium batteries can be measured by two indicators, namely specific capacity (mAh/g) and specific energy density (Wh/kg).
Specific capacity refers to the number of lithium ions the negative electrode material can store per gram, usually expressed in mAh/g. The higher the specific capacity, it means that the negative electrode material can store more lithium ions per unit mass, thereby increasing the battery capacity. Common anode materials such as graphite have a specific capacity of around 300-400 mAh/g.
Specific energy density refers to the electrical energy that can be released per unit mass of the negative electrode material, usually expressed in Wh/kg. The higher the specific energy density, it means that the negative electrode material can release more high energy.ctric per unit mass, thereby increasing the energy density of the battery. Common anode materials such as graphite have a specific energy density of around 0.3 to 0.35 Wh/kg.
It should be noted that the specific amount of negative electrode material will also be affected by factors such as battery design, battery capacity, battery chemical system, etc. , so it may change in real applications. In addition, with the development and application of new materials, the specific capacity and specific energy density of negative electrode materials are also constantly improving.