Supercapacitors are considered to be the most promising new energy storage devices due to their high power density and long cycle life. They have huge application value and market in many fields such as transportation, power, communications, defense, consumer electronics, etc. potential. In recent years, people continue to improve the performance of supercapacitors through the development of new materials, and give them new features and functions (such as light weight, flexibility, woven, etc.), so that it can be better applied to actual life and production.
A bold and exciting idea is whether to develop an innovative supercapacitor and give it new intelligent features. "Intelligent" means that the supercapacitor can only perform the function of pure energy storage. After intelligentization, it does not require complex circuit design to obtain the ability to interact with people, such as converting its own performance data into graphics or images on the screen. Show it and process it interactively.
Recently, Zhao Zhigang's research group of Suzhou Institute of Nanotechnology and Nanobionics, Chinese Academy of Sciences developed a smart supercapacitor electrode to help solve this problem. This smart supercapacitor electrode is made of tungsten oxide (W18O49) nanowires and polyaniline (PANI) as the electrode active material, and is prepared by patterning. Tungsten oxide (W18O49) is composed of the pattern "SINANO" and polyaniline (PANI). background. The electrode has rich color changes and excellent capacitance performance. It can display its energy storage state through the interactive change of its pattern and background color (see figure). When one component is colored, the other component is transparent. As the energy storage and release process progresses, the colors of the pattern (W18O49) and the background (PANI) change correspondingly. This research combines the energy storage function of ordinary supercapacitors and the visual changes of electrochromism, giving supercapacitors a "smart" new feature, which opens a new path for the future development of supercapacitors.
The research results have been published in the international journal "Nano Letters" (Nano Letters, 2014, 14, 2150? 2156). The above-mentioned scientific research work has received strong support from the National Natural Science Foundation of China and the Ministry of Education's Research Fund for Returned Overseas Students.
The smart supercapacitor electrode shows the change of its energy storage state through the interactive change of pattern and background color
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