Current situation of supercapacitor industry？

Current situation of supercapacitor industry？

          Supercapacitors are capacitors with fast and large capacity energy storage (electrical energy) capabilities. Its performance and structure are between ordinary capacitors and batteries. According to the working principle, supercapacitors can be divided into double-layer capacitors, Faraday quasi capacitors (pseudocapacitors), and new types of lithium-ion supercapacitors. The working principle of double-layer capacitors is closer to traditional capacitors, storing and discharging energy through the adsorption of charges on the electrodes. Lithium ion supercapacitors increase the working voltage by doping lithium ions on the negative electrode of double-layer capacitors, while Faraday quasi capacitors store and discharge energy through reversible oxidation-reduction reactions, which are more similar to batteries. At present, double-layer capacitors (EDLC) are the mainstream, and lithium-ion supercapacitors are an important development direction.

At present, the energy density of hybrid supercapacitors has significantly increased, and the localization of raw materials has driven the cost of supercapacitors to continue to decline. Various ministries and commissions have successively issued multiple policies to support the development of new energy storage industries, including power based energy storage. The triple benefits of technological progress, cost reduction, and policy driven development are expected to jointly promote the use of supercapacitors. Supercapacitors are not only based in mature markets such as smart meters and rail transit, but also opening up markets in areas such as port machinery, mining equipment, power grid frequency regulation, oil to electricity conversion, energy storage, and electric buses. In particular, there is great potential for energy storage, power grid frequency regulation, and passenger car use, and the space of billions of shopping malls is opening up.

Supercapacitors have the characteristics of fast charging and discharging, high power density, low energy density, long lifespan, and wide operating temperature, making them suitable for short-term high-power energy storage scenarios. In terms of discharge efficiency, ordinary capacitors>supercapacitors>batteries; In terms of power density, supercapacitor=ordinary capacitor>battery; In terms of energy density, batteries>supercapacitors>ordinary capacitors; In terms of lifespan, supercapacitor=ordinary capacitor>battery; In terms of temperature characteristics, supercapacitors>ordinary capacitors>batteries. The above characteristics determine that supercapacitors are suitable for short-term high-power energy storage scenarios, quickly capturing the energy released from peak power and releasing it quickly in a relatively short period of time.

Supercapacitors fully participate in the development of the new energy industry from the power generation end, transmission end, to the substation end, energy storage end, and application end. In wind power generation, the pitch system adjusts the blade angle according to changes in wind speed to ensure stable power output, and ensures safe shutdown of the unit in case of excessive wind speed or serious faults. This is the key to maintaining stable operation of wind turbines. Supercapacitors have high reliability and maintenance free characteristics, making them an ideal choice for backup battery packs in pitch systems. With the large-scale construction of offshore wind power, the market for supercapacitor wind power pitch will further grow. Photovoltaic power generation is greatly affected by weather conditions, and the output power may fluctuate by 80% within 5 minutes due to cloud cover. Introducing supercapacitor energy storage can help smooth the output. In addition, supercapacitors are required for frequency and voltage regulation of the power grid in long-distance power transmission; In distributed generation, supercapacitors can be used to maintain bus voltage stability within an allowable range, reducing the impact of distributed generation grid connection on the power grid.