Titanium-carbide-coated straw-based activated carbon composite electrode material and preparation method thereof

Abstract

The invention discloses a titanium-carbide-coated straw-based activated carbon composite electrode material. The composite electrode material is characterized by being prepared from raw materials in parts by weight as follows: 2-3 parts of nitric acid, 1-2 parts of silicon dioxide, 2-3 parts of lithium acetate, 1-2 parts of ammonium hexachloroiridate, 1-2 parts of chromium trifluoride, 1-2 parts of silver fluoride, 1-2 parts of a silane coupling agent KH-550, 3-5 parts of titanium carbide, 3-5 parts of a PAN (polyaniline) composite material, 1000-1200 parts of straw, 3-5 parts of anhydrous potassium hydroxide and 5-10 parts of deionized water. The PAN composite material has the advantages of low price, high charge density and the like and can improve electrical conductivity and electrical storage performance after added to the electrode material; the titanium carbide has high hardness, wear resistance and conductivity and effectively increases the surface utilization rate, reduces the resistance and improve the specific capacity of the electrode material after added to the electrode material.

Description

technical field [0001] The invention relates to the field of chemical energy materials, in particular to a titanium carbide-coated straw-based activated carbon composite electrode material and a preparation method thereof. Background technique [0002] Climate warming, environmental pollution and energy shortage are major challenges facing mankind at present, and the development of green and renewable energy storage devices is an important issue before mankind. As a new type of green energy storage device, supercapacitors have much higher energy density than traditional capacitors and much higher power density than batteries. application prospects. According to different energy storage mechanisms, supercapacitors can be divided into electric double layer capacitors and pseudocapacitors or redox capacitors. Electric double layer capacitors rely on the electric double layer at the interface between the electrode and the electrolyte to store charges, and the electrode materia...

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Problems solved by technology

Conductive polymers have the advantages of low price and high conductivity, but the electrode materials prepared from them have low cycle life

For electric double layer capacitors, the capacitance value is proportional to the electrode / electrolyte interface, so the performance of the electrode is limited by the surface area of ​​the carbon material, and not all pores contribute to the specific capacitance, only the surface accessible to the electrolyte It has an effect on the improvement of capacitance, but in general, due to the limitation of specific surface area, the specific capacitance value of carbon materials is still relatively low