The development of technology and the times has produced many useful and convenient electronic products. The emergence of these electronic products has not only improved people's lives but also greatly improved work efficiency. Like a harvester that can complete work that takes several people several days in less than a day. This is the ability of electronic products. It can be said that the emergence of electronic products has changed people's lives.

Electronic products are necessities in people's daily lives now. There are many portable electronic products that work normally with batteries, and batteries bring benefits and harms to people. Because batteries contain a large amount of heavy metals such as zinc, lead, cadmium, mercury, manganese, etc., due to the chemical properties of these heavy metals cannot be biodegraded and cannot be decomposed, they cause serious pollution to the environment. Coupled with people's insufficient awareness of environmental protection, used batteries are discarded at will.

The discarded batteries rot in the ground, and heavy metals such as zinc, lead, cadmium, mercury, manganese in them will pollute groundwater and soil and penetrate into fish and crops. After people eat food containing heavy metals, their health will be damaged and death may occur in severe cases.

In order to solve the problem of battery pollution to the environment, supercapacitors have emerged.

Supercapacitors are a new type of energy storage device between traditional capacitors (usually electrolytic capacitors) and secondary batteries (rechargeable batteries, mainly lead-acid batteries, lithium batteries, etc.). They have both high power characteristics of traditional capacitors and high energy characteristics of batteries. They can provide electrical energy without polluting the environment. At the same time, supercapacitors have high functional density, strong charge-discharge capacity, long service life, wide temperature range (especially good ultra-low temperature performance), high reliability, maintenance-free characteristics and other characteristics that are welcomed by the new energy field.

In addition to being widely used for large capacity, high power density and long service life, supercapacitors are better than batteries in one aspect: supercapacitors are green and environmentally friendly and are ideal green energy.

Supercapacitors do not contain heavy metals or harmful chemicals. Their main energy storage material is carbon. Carbon materials are abundant resources and belong to non-metallic elements. They are important components of biology. Animals, plants, coal are all composed of carbon elements. The resources are abundant and can be seen everywhere in the environment. They are environmentally friendly and will not pollute the environment.

Moreover, supercapacitors will not cause environmental pollution from production to scrapping process. They are environmentally friendly. This is also the reason why supercapacitors are widely used in the new energy field.