Lithium batteries and supercapacitors are two different types of energy storage devices. They have the following differences:
1. Different energy storage mechanisms: Lithium batteries store and release energy by moving lithium ions between positive and negative electrodes, while supercapacitors store charge via electrostatic fields.
2. Different energy densities: Lithium batteries have a higher energy density because they can store a large amount of energy in a relatively small volume. Although supercapacitors can charge and discharge quickly, their energy density is relatively low.
3. Different charging and discharging speeds: Supercapacitors can charge and discharge quickly. On the other hand, lithium batteries take longer to complete the charging and discharging process.harge.
4. Lifespan and repeatability: Lithium batteries are generally capable of multiple charge and discharge cycles, but have a short lifespan. Supercapacitors have a longer lifespan, can undergo more charge and discharge cycles, and have better repeatability.
5. Different application scenarios: Since supercapacitors have the characteristics of fast charging and discharging and long life, they are used in fields that require frequent charging and discharging, such as the power system of electric vehicles, fast batteries. load, etc. Widely used; while lithium batteries are used more in scenarios that require stable and long-term use, such as portable electronic devices, energy storage systems, etc.
Capacitance equals voltage multipliede by the current. If it is a 2.7V3000F supercapacitor, the energy that can be stored is 10935 Joules, or 3Wh. If the battery is a 3.7V lithium battery, it is equivalent to 810mAh. The energy density of supercapacitors is relatively low, so it is not suitable to use them instead of batteries for long-term energy storage. Supercapacitors can be used for short-term energy storage and high-power charging and discharging.