Recently, in a paper published in the journal NANO, a group of researchers at China University of Mining and Technology produced a FeCo-selenide nanosheet array as a positive electrode and Fe. 2O3Nanorod arrays as asymmetric supercapacitors (ASC) for negative electrodes. There is evidence that FeCo-selenide may be the next generation of promising electrode materials in energy storage devices.
Supercapacitors are considered to be the most attractive candidates for energy storage devices and are widely used in portable electronics and electric vehicles. They feature high power density, fast charge/discharge rates, low maintenance costs and long cycle life.
Similar to transition metal bimetal oxides and sulfides, metal selenides can be considered as promising candidates for electrode materials because selenium belongs to the same group of elements. A group of researchers at China University of Mining and Technology successfully produced a FeCo-based -selenide solid state energy storage device as positive electrode, Fe 2O3As a negative electrode.
Their report was published in the journal NANO. Using Fe foam as a substrate and current collector, FeCo-selenide was synthesized by a two-step hydrothermal method. The FeCo-selenide nanosheet array prepared on Ni foam showed a current density of The specific capacity obtained at 1A / g is 978F/g (163mAh/g), and 81.2% cycle stability is obtained after 5000 cycles. The ASC device operating at 1.6 V has a power density of 759.6 W/kg. The maximum energy density is 34.6 Wh/kg, which is higher than many other ASCs previously reported.
They explored the practical application of ASC equipment by assembling several capacitors into a series circuit to illuminate one LED bulb and panel of CUMT. The ASC device exhibits excellent electrochemical performance, indicating FeCo-selenide May become the next generation of promising electrode materials in energy storage devices.
The team at China University of Mining and Technology is currently exploring ways to better control high-voltage output. Creating high-performance ASC. In order to achieve optimal electrochemical performance and reduce costs, the team also hopes to explore devices based on selenide composites in their applications. .
