In the 1990s, the production capacity of aluminum foil materials for aluminum electrolytic capacitors was mainly concentrated in Japan. As domestic manufacturers successfully realized the process technology of mass production of high-purity aluminum using the three-layer electrolyte method, the domestic aluminum foil material industry for aluminum electrolytic capacitors developed in the 1990s. It began to develop gradually at the end of the year. Compared with Japan, China has raw material, energy and labor cost advantages. With the gradual improvement of domestic production technology, the production capacity of aluminum foil materials for aluminum electrolytic capacitors has gradually been transferred domestically. After years of research and development and experience accumulation, domestic manufacturers have gradually The technological gap with Japanese companies has been narrowed, and the quality and performance of some products have reached the international advanced level, and there is a trend of domestic substitution in the high-end market.
Aluminum foil materials for aluminum electrolytic capacitors are mainly used in the production of aluminum electrolytic capacitors. Capacitor is one of the three major passive electronic components (capacitor, inductor and resistor). It is an indispensable basic electronic component in electronic circuits. The main function of capacitors in electronic circuits is to pass AC and block DC. It has Filtering, bypassing, coupling and fast charging and discharging functions. According to different dielectrics, capacitors are mainly divided into aluminum electrolytic capacitors, tantalum electrolytic capacitors, ceramic capacitors and film capacitors, among which aluminum electrolytic capacitors account for 20%-30%. Aluminum electrolytic capacitors have the characteristics of small size, large storage capacity, and high cost performance. They are widely used in consumer electronics, industrial control, mobile communications, new energy vehicles, wind power and photovoltaics, aerospace and many other application fields. In recent years, benefiting from the rapid development of the above-mentioned industries, the demand for aluminum electrolytic capacitors has been strong, providing a broad development space for aluminum foil materials used in upstream aluminum electrolytic capacitors.
In March 2021, the ninth meeting of the Central Financial and Economic Commission made it clear that my country will strive to achieve carbon peak before 2030 and achieve carbon neutrality before 2060. The new energy field will become the main driving force for the growth of the aluminum electrolytic capacitor market, which will be used in photovoltaics. Aluminum electrolytic capacitors in fields such as wind power, new energy vehicles, etc. are developing towards high specific volume, high voltage, and high performance. At the same time, as consumers increasingly demand features such as portability, high stability, and long life for terminal electronic and electrical products, matching high specific volume, high strength, low leakage and other properties have become the future development direction. Therefore, with the continuous upgrading of traditional industries and the development of emerging industries such as new energy and 5G communications, high specific volume, high voltage, and high performance have become the future development direction of aluminum foil materials for aluminum electrolytic capacitors.
