French startup Nawa Technologies' innovative ultracapacitors are fast-charging and provide the ideal power density, ready to stand out in the automotive, power tools, and aviation industries. According to "Wall Street News", this super capacitor can fully charge an electric car in less than 20 seconds.
Compared with traditional batteries, the energy density of this super capacitor is not large. But compared to other supercapacitors, the energy stored in its carbon nanotube structure has increased five times, and its charging cycle can be up to 1 million times, which is very durable in the temperature and environment range that can test the limits of standard batteries, such as space, high temperature Drilling or subsea.
According to Nawa Technologies, the current global supercapacitor market size is approximately $ 560 million, but it is expected to grow by 400% -600% in the next five years. As carbon nanotube supercapacitors will begin large-scale production, companies that map domestic carbon nanotubes are also expected to benefit from this.
According to the understanding of the powder network, carbon nanotubes (CNTs) have a unique hollow structure, good electrical conductivity, high specific surface area, chemical stability, pores suitable for electrolyte ion migration, and intertwining to form nano-scale network structures And other advantages, so its use as an electrode material can significantly improve the power characteristics of supercapacitors, is considered an ideal supercapacitor electrode material, and has become a research focus in recent years.
However, due to the limitation of the manufacturing process level, the current specific surface area utilization rate of CNTs is still low, making its specific capacitance smaller and becoming a bottleneck for the development of CNT-based capacitors. Chemical activation can significantly increase its available specific surface area, increase its specific capacitance, and compound CNTs with quasi-capacitive material metal oxides or conductive polymers, which can give play to their respective advantages, make up for shortcomings, and produce synergistic effects, resulting in low cost High-performance composite electrode materials are one direction of its development. While maintaining the high power characteristics of CNTs, more in-depth research is needed to improve their specific capacitance.