LOREM IPSUM DOLOR SIT AMET
On June 5, 2020, SCIENCE CHINA Materials published the new achievements of Nan Xue University Gao Xueping’s research group in the direction of optical energy storage chemical power: “Quasi-solid-state solar rechargeable capacitors based on in-situ Janus modified electrode for solar energy multiplication effect”
Lorem ipsum dolor sit amet, consectetur adi pisicing elit
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua
Ut enim ad minim veniam, quis exercitation ullamco laboris nisiut aliquip
Duis aute irure dolor in reprehenderit in voluptate velit esse
This work is based on the strategy of Janus shared electrodes, integrated design of perovskite solar cells and supercapacitors, the introduction of gel electrolytes, the construction of quasi-solid photorechargeable energy storage devices, and the conventional solar cells’ power density of ~10 mW cm-2 Raised to the current 500 mW cm-2, it not only integrates the integration of solar storage, storage and utilization of optical storage, but also achieves the multiplication and amplification of solar power. The first author of the paper is PhD student Peng Chen.
A solar cell is a photoelectric conversion device, which can be understood as a power generation device; a chemical power source is a conversion and storage device for chemical energy and electrical energy, and is an energy storage device. The integration of optical storage is a technology that combines the functions of these two devices. This includes both the integration of solar cells and secondary batteries, as well as the matching of solar cells and supercapacitors, which correspond to the development strategies of energy type and power type, respectively.
Generally, the irradiance of solar energy is 100 mW cm−2 under the standard light intensity AM1.5, and only 10–20 mW cm−2 after conversion by solar cells. Such low power density limits the solar cells in many fields. application. It is estimated that driving a common air conditioner requires 5–10 m2 of solar panels, and starting an electric car by solar cells alone cannot meet its instantaneous power requirements.
In order to realize the integration of power-type optical storage, this work will integrate high-efficiency perovskite solar cells and high-power water-based supercapacitors, and build a quasi-solid optical storage based on the strategy of Janus sharing electrodes and introducing gel electrolytes. The integrated device can realize the conversion, storage and utilization of solar energy-chemical energy-electric energy. In particular, through the collection/release strategy on the time scale, the power density of the device was increased to 500 mW cm-2, which successfully broke through the power density limit of solar radiation. Compared with ordinary solar cell devices, the power density is increased by about 50 times, and the solar power is doubled and amplified. At the same time, this new mode of integration of optical storage can achieve a total energy conversion efficiency of 4%. Under actual working conditions, this power type optical energy storage device can also effectively alleviate the strong dependence of solar cells on light and the demand for electric energy input of ordinary capacitors, significantly improving the practicality of solar energy.
