Can supercapacitors replace lithium batteries in the future?

by:CTECHi     2021-07-22

As the heart of electric vehicles, the development of power batteries has always been the focus of consumers’ attention. After all, the size of battery capacity directly affects the length of the cruising range and the development of electric vehicles, but our current lithium batteries are affected by materials The impact of characteristics has led to a halt in the battery industry. Therefore, finding new energy storage devices to replace lithium batteries will be an inevitable trend in future development. So we wonder, why not use super capacitors as power batteries, and can it replace lithium batteries in the future?

The so-called supercapacitor, also known as electrochemical capacitor, is an energy storage system that has become more and more popular in recent years. It can be thought of as a hybrid of ordinary capacitors and batteries, but different from the two. Just like batteries, supercapacitors also have positive and negative electrodes separated by an electrolyte. However, unlike batteries, supercapacitors store energy in an electrostatic manner like a capacitor, rather than chemically storing energy like a battery. In addition, supercapacitors also have unparalleled advantages of lithium batteries, such as it can 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 charge and discharge time; ultra-low temperature Good characteristics; strong discharge capacity for large currents, etc.

In this way, supercapacitors are the best way to power electric vehicles. However, everything has advantages and disadvantages. It is still impossible to replace lithium batteries with supercapacitors, because the current production of supercapacitors is technically incomplete 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 switch to super capacitors, then the entire vehicle will have to load more volumetric super capacitors. Another point is that it is not resistant to high temperatures and cannot be placed in a humid environment, otherwise it will affect normal operation and even damage the battery.

If we look at its advantages, supercapacitors are definitely 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 brought by supercapacitors. By then, there will be new breakthroughs in the power batteries of new energy vehicles.

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