Supercapacitor generally refers to double-layer capacitors. Double-layer capacitors (Electrical Double-Layer Capacitor) are a type of supercapacitor and a new type of energy storage device. Supercapacitors are also called golden capacitors and farad capacitors. They are a new type of electrochemical capacitors. Their special feature is that no chemical reaction occurs during the storage of electrical energy. This reaction is reversible. Due to the working principle, supercapacitors can be repeatedly charged and discharged hundreds of thousands of times, so they have a long working time. Double-layer capacitors are between batteries and capacitors, and their huge capacity can be used as batteries.
Lithium battery is a type of battery that uses lithium metal or lithium alloy as positive/negative electrode materials and uses non-aqueous electrolyte solutions. Lithium metal batteries were first proposed and studied by Gilbert N. Lewis in 1912. In the 1970s, M. S. Whittingham proposed and began to study lithium-ion batteries. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. With the development of science and technology, lithium batteries have become mainstream.
In recent years, super capacitors have gradually replaced ordinary capacitors due to their advantages such as large energy storage and fast charging speed. The capacitance of supercapacitors of the same volume is much larger than that of ordinary capacitors. The capacitance of supercapacitors has reached the farad level, while the capacitance of ordinary capacitors is very small, usually at the microfarad level. Supercapacitors can not only replace ordinary capacitors, but also have a future development trend of replacing lithium batteries.
1. The difference between the working principles of supercapacitors and lithium batteries
The energy storage mechanism of supercapacitors and lithium batteries is different. Supercapacitors store energy through a double-layer energy storage mechanism, while lithium batteries store energy through a chemical energy storage mechanism.
2. The difference between energy conversion between supercapacitors and lithium batteries
There is no chemical reaction when supercapacitors convert energy, while lithium batteries convert energy between electrical energy and chemical energy.
3. The difference between charging speed of supercapacitors and lithium batteries
Supercapacitors charge faster than lithium batteries. They can reach 90% of the rated capacity after charging for 10 seconds to 10 minutes, while lithium batteries can only reach 75% after half an hour.
4. The difference between the working time of supercapacitors and lithium batteries
Supercapacitors can be charged and discharged hundreds of thousands of times and have a long service life. Lithium batteries need to be replaced every 800 to 1,000 times, which is very troublesome and can be used for a short time.
5. The difference between environmental protection of supercapacitors and lithium batteries
Supercapacitors will not pollute the environment from production to use and then to disassembly. They are ideal environmentally friendly energy sources, while lithium batteries cannot be decomposed and cause serious pollution to the environment.
From the difference between supercapacitors and lithium batteries, we can see that the advantages of supercapacitors are much better than lithium batteries. With the above advantages, supercapacitors have broad prospects in new energy vehicles, the Internet of Things and other industries.
Below are the UF Capacitors supercapacitors Cross reference
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