Can supercapacitors be used as batteries?
As the heart of electric vehicles, the development of power batteries has always been the focus of consumers' attention. After all, the size of the battery capacity directly affects the cruising range and the development of electric vehicles. However, our current lithium batteries are affected by the characteristics of materials. Lead to the stagnation of the battery industry. Therefore, finding new energy storage devices to replace lithium batteries will be an inevitable trend in future development. So we will think, why not use super capacitors as power batteries, can it replace lithium batteries in the future?
So-called supercapacitors , also known as electrochemical capacitors , are an increasingly popular energy storage system in recent years. It can be thought of as a hybrid similar to a normal capacitor and battery, but different from both. Just like batteries, supercapacitors have positive and negative electrodes separated by an electrolyte.
Unlike batteries, however, supercapacitors store energy electrostatically, like capacitors, rather than chemically, like batteries. In addition, supercapacitors also have incomparable advantages of lithium batteries, such as the ability to store a large amount of electricity in a small volume; long cycle life, which can be repeatedly charged and discharged hundreds of thousands of times; short charging and discharging time; ultra-low temperature Good characteristics; high current discharge capacity and so on.
In this way, supercapacitors are a good way to serve as a power source for electric vehicles. However, everything has advantages and disadvantages. At present, it is still impossible to generally replace lithium batteries with super capacitors, because the current production of super capacitors is not technically complete and the production cost is high. In addition, its energy density is low and cannot store more energy per unit volume. If pure electric vehicles use supercapacitors, the entire vehicle will have to be loaded with more volumetric supercapacitors. Another point is that it is not resistant to high temperature and cannot be placed in a humid environment, otherwise it will affect normal work and even damage the battery.
If we only look at the advantages, supercapacitors are an alternative to new energy vehicle batteries. But its shortcomings also restrict its development in new energy vehicles. However, we believe that in the near future, we will overcome the shortcomings caused by super capacitors, and there will be new breakthroughs in the power battery of new energy vehicles.