36results about How to "Improve electrode activity" patented technology

The invention relates to a preparation method of a high-performance electrode material used for high-concentration ratio operation of circulating water. The steps are as follows: disperse and suspend graphite powder in deionized water; add multi-wall carbon nanotubes; prepare the required solution; 2 solution and ReCl 2 The solution was dropped into the mixture; then PtCl was added dropwise 4 solution; add NaOH solution to the mixture until the pH reaches 9; add ammonia water to the mixture until the pH reaches 10, and cool the mixture to room temperature to clarify; suck out the supernatant and wash the reaction product until the pH of the eluate drops to 7.5; Add deionized water to the reaction product and stir; add the prepared NaBH to the mixture 4 solution, and the mixture is cooled to room temperature for clarification; the mixture is suction filtered; the filter cake is placed in an oven to dry; high-performance electrode materials are obtained, which can be formed by pressing. High-performance electrode materials are used for circulating water treatment, which can ensure the low-cost and high-concentration ratio operation of the circulating water system.

The invention discloses a liquid cathode, which is composed of a hydrophobic functionalized ionic liquid, a conductive electrode and a hydrophilic PVC solid support film. The hydrophobic functionalized ionic liquid is filled in a bag made of the hydrophilic PVC solid support film Then, the conductive electrode is placed in it to make a liquid cathode; the electrode preparation method is simple, the electrode specific surface area is large, the capacitance is large, and the physical adsorption, chemical adsorption, and electrosorption are organically coupled, which is not only suitable for high-concentration heavy metal wastewater. It is also suitable for the advanced treatment of several ppm low-concentration heavy metal ion wastewater in water; it solves the problems of low current density, inability to efficiently transfer mass, low electrolysis efficiency and high power consumption when conventional electrodes electrolyze low-concentration heavy metal wastewater.

A double-layer composite structure ceramic, a preparation method of the ceramic, a self-adsorption lithium-air battery and a preparation method of the battery relate to the technical field of lithium-air batteries. The invention aims to solve the problem that the water in the traditional water-based lithium-air battery is continuously consumed but it is inconvenient to add it in time. The invention adopts dry pressing, spin coating, and sintering methods to successfully realize the preparation of a double-layer composite structure electrolyte, and uses the methods of impregnation and vacuum drying to prepare a water vapor adsorption layer in the porous electrode, and uses the water vapor adsorption layer to achieve water absorption and water retention. Objective To solve the problem of water addition in aqueous lithium-air batteries. The invention is applicable to the field of preparation of self-adsorption lithium-air batteries.

The invention relates to a material processing method, in particular to an electrode processing method applied to direct synthesis of hydrogen peroxide through oxygen electroreduction, and belongs to the field of hydrogen peroxide direct synthesis through electrochemistrical oxygen reduction. A processing method for etching a graphite felt electrode through ferrocene-glacial acetic acid solution steam is designed; the glacial acetic acid-ferrocene solution steam is injected under the high-temperature oxygen-free condition to etch the surface of the graphite felt electrode, the original smooth graphite felt microcosmic surface becomes rough and porous through the etching process, and the specific surface area can be simply and effectively increased; and meanwhile, surface changes cannot influence the graphite felt structure, and the mechanical property is kept well. In this way, the aims of improving the electrode activity and being free of influences on stability are achieved. The problem that an existing technology for direct synthesis of hydrogen peroxide through electro-catalysis oxygen reduction is low in electrode catalysis activity is solved.

The invention relates to a metal electrode activation method for an oxygen-metal battery. By forcedly oxidizing a substrate, the volume of the substrate is expanded, and the stress is increased to lead the substrate to peel off. According to the metal electrode activation method, oxygen content in an electrolyte is increased by increasing oxygen partial pressure on an electrolyte level, oxygenating microbubbles and through stirring and oxygenating modes; oxygen is diffused and penetrates through a compact oxygen membrane of a metal electrode under the driving of oxygen concentration and fluid pressure of the electrolyte, enters the oxygen membrane and is combined with metal to generate an oxide, the volume of the metal after combined with the oxygen through diffusion is expanded, the hard and brittle oxygen membrane is broken and peeled off due to stress, and the metal substrate is exposed, therefore, the purpose of metal electrode activation before battery discharging is achieved.

The invention provides a method for preparing an efficient and stable ruthenium dioxide-based acidic oxygen evolution electrocatalyst. In the method, carbon cloth is used as a base, ruthenium trichloride solution is dipped and coated on the carbon cloth, and then heat treatment is performed to oxidize ruthenium trichloride into ruthenium dioxide. The obtained ruthenium dioxide is supported on the carbon cloth in the form of nano-scale particles, has the characteristics of high catalytic activity and stable catalytic effect, and can be used as an anode of an industrial acidic water electrolysis hydrogen production device.

The invention discloses a metal boride water-splitting catalyst, a preparation method and an application of the catalyst in electro-catalytic water splitting and belongs to the technical field of preparation of an electrocatalyst. The metal boride water-splitting catalyst is prepared with a solid-phase boriding method, transition metal is coated with a solid boriding agent, and boriding treatmentis performed through temperature programming heating. The boriding agent is prepared from a necessary boriding medium and an unnecessary filling agent. Compared with liquid boriding, a solid boridingmethod has the advantages that the surface clearing difficulty is low after boriding, requirements for equipment are low, and the method is applicable to boriding treatment of various transition metals. The catalyst has very good intrinsic catalysis activity and stability performance under the alkaline condition, and the required potential is 300-400 mV when the current density is 10 mA cm<-2>; the electro-catalytic water splitting oxygen evolution stability can be as long as at least 100 h while the performance is not attenuated, and the catalyst can replace noble metals to promote commercialapplication of electro-catalytic water splitting.