Silicon-doped straw-based charcoal composite electrode material and preparation method thereof

Abstract

The invention discloses a silicon-doped straw-based charcoal composite electrode material. The silicon-doped straw-based charcoal composite electrode material is characterized in that the composite electrode material is prepared by the following raw materials in parts by weight: 3 to 5 parts of micron silicon, 3 to 4 parts of carbonitride, 2 to 3 parts of lithium nickel-manganese oxide, 1 to 2 parts of gold mercaptide, 2 to 3 parts of ferric (III) fluoride, 1 to 3 parts of carboxymethyl cellulose, 1 to 2 parts of a silane coupling agent KH-792, 1000 to 1200 parts of straw, 8 to 12 parts of zinc chloride, 4 to 7 parts of citric acid, 3 to 5 parts of modified acetylene black and 100 to 500 parts of distilled water. According to the invention, the added modified acetylene black has the advantages of enhancing the conductiver performance and improving the high-magnification charge and discharge performance and the like, the added micro silicon has quite high specific capacitance, the capacity attenuation in a circulation process is rapid, the circulating performance is poor, and the carbonitride has the effect of structure stabilization, inhibits the capacity attenuation and improves the charge and discharge circulating performance of an electrode.

Description

technical field [0001] The invention relates to the field of chemical energy materials, in particular to a silicon-doped straw-based carbon composite electrode material and a preparation method thereof. Background technique [0002] With the development and utilization of clean energy, energy storage is particularly important, and it is imminent to develop a new type of energy storage device. Supercapacitor is a new type of energy storage / conversion device, which is widely used in portable electronic products, hybrid electric vehicles and large industrial equipment due to its advantages of high energy density, short charge and discharge time, long cycle life and no pollution. Electrode material is the most critical factor determining the electrochemical performance of supercapacitors. However, the one-sidedness of the electrochemical performance of a single electrode material can no longer meet the demand. The supercapacitor electrode material obtained by compounding by cer...

AI Technical Summary

Problems solved by technology

However, the one-sidedness of the electrochemical performance of a single electrode material can no longer meet the demand. The supercapacitor electrode material obtained by compounding by certain means has excellent electrochemical performance, good conductivity, and high stability, and has broad application prospects and commercial uses.