A kind of electrochemical capacitor and electroadsorption desalination electrode material

Abstract

The invention discloses an electrochemical capacitor and electro-adsorption desalination electrode material, which is formed by the combination of nano nickel oxide and nano carbon materials. The preparation method of the electrochemical capacitor and electro-adsorption desalination electrode material comprises the steps of: 1, preparing a nickel salt aqueous solution; 2, mixing the nickel salt aqueous solution with the nano carbon materials; 3, preparing nanocarbon / nickel oxide composite powder; 4, and preparing an electrode. The electrochemical capacitor and electro-adsorption desalination electrode material obtains large capacitance by utilizing oxidation-reduction property of the nano nickel oxide, is high in conductivity, high in specific surface area and high in utilization rate of specific surface area, endows the electrode with high capacitance of capacitor and energy density, has good charging-discharging repeatability, is easy to implement technological parameter control, is even to coat the nano carbon with the nano nickel oxide, and is suitable for industrialized mass production; and the prepared nickel oxide electrode is small in expansion and high in specific capacity, and has good charging-discharging performance, excellent inorganic ion electro-adsorption performance, long service life, and very high practical value.

Description

technical field [0001] The invention relates to an electrochemical capacitor and an electrode material for electroadsorption desalination, belonging to the field of chemical engineering and new materials. Background technique [0002] In the past ten years, developed countries such as Russia, the United States, and Japan have actively developed a battery designed to address the defects in pulse output power, low-temperature discharge characteristics, and service life exposed in actual use of chemical secondary power sources such as batteries. A physical energy storage secondary power supply that makes up for the above-mentioned shortcomings of the battery - an electrochemical capacitor. Electrochemical capacitors not only have the energy storage characteristics of batteries, but also have the power characteristics of capacitors. Compared with traditional electrolytic capacitors, their product energy density is thousands of times higher, while the leakage current is thousands...

AI Technical Summary

Problems solved by technology

Traditional ruthenium oxide has a large capacitance and is favored by electrochemists, but it has not been able to be applied industrially due to its high price [Kvastek, K.; Horvat-Radoševic, V. Electrochemical properties of hydrous ruthenium oxide films formed and measured at different potentials Journal of Electroanalytical Chemistry Volume: 511, Issue: 1-2, September 21, 2001, pp. 65 - 78], patent CN02217073.1 uses sintered nickel oxide as the electrode material, which has high power density and energy density, and is light in weight. Low cost, long life, etc., but its high resistance causes large electrode energy loss and serious self-discharge

Patent CN02112894.4 uses activated carbon as the electrode material to increase the capacitance through metal ions Al3+, Li+, Zn2+, Cu2+, Tl+, Pb2+, but the use of heavy metals in the production process is likely to cause environmental pollution

Patent US7,074,880 uses carbon aerogels as electrode materials, but the self-discharge of electrochemical capacitors using carbon aerogels is very serious, which is not conducive to industrial applications