Hollow porous carbon ball electrode material for supercapacitors and method for preparing hollow porous carbon ball electrode material

Abstract

The invention discloses a hollow porous carbon ball electrode material for supercapacitors and a method for preparing the hollow porous carbon ball electrode material, and belongs to the technical field of new energy. Hollow MIL-100 (Fe) nanometer materials for the hollow porous carbon ball electrode material are prepared by the aid of layer-by-layer assembly processes, are used as precursors and are subjected to heat treatment and hydrofluoric acid treatment in inert atmosphere to obtain hollow porous carbon balls. The hollow porous carbon ball electrode material, acetylene black and polyvinylidene fluoride are mixed with one another to obtain mixtures when electrodes of the supercapacitors are about to be prepared, and the mixtures are smeared on stainless steel current collectors to obtain working electrodes. The hollow porous carbon ball electrode material and the method have the advantages that the hollow porous carbon ball electrode material for the supercapacitors is high in specific capacitance and electrochemical stability and wide in test electric potential window as compared with single components, is long in service cycle life and is environmentally friendly; the working electrodes are easy to prepare and excellent in electrochemical performance and have broad application prospects.

Description

technical field [0001] The invention relates to a hollow porous carbon sphere electrode material for a supercapacitor and a preparation method thereof, in particular to a method for preparing a hollow porous carbon nanosphere supercapacitor electrode material using a hollow MIL-100 (Fe) nanosphere as a precursor. Background technique [0002] With the continuous development of economy and society, energy is continuously consumed, resulting in energy depletion and consequently a large number of environmental problems. In order to solve these problems, new clean energy has become the focus of scientific research. As an energy storage device, supercapacitors have attracted extensive attention due to their high power density, short charging time, and long cycle life. According to their different energy storage mechanisms, supercapacitors can be divided into: electric double layer supercapacitors and Faraday supercapacitors (pseudocapacitive supercapacitors). Carbon materials ha...

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Problems solved by technology

Among them, the preparation process of the hard template method includes: the preparation and carbonization of the template, and according to whether the carbonization process introduces an additional carbon source, it can be divided into two categories: (1) direct carbonization of the precursor, this method does not require additional carbon sources, and the obtained porous Carbon usually has high specific surface area and pore volume, but its yield is low

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