40results about How to "Improve ion conduction" patented technology

The invention relates to a method for improving specific capacitance of an electric double-layer capacitor, belongs to the technical field of a capacitor and solves the problems that since liquid absorption rate of a capacitor diaphragm for electrolyte is low, equivalent internal resistance of the electric double-layer capacitor is large, ionic conductance is low and specific capacitance is low in the prior art. The method comprises the following steps: to begin with, peeling an eggshell membrane from an eggshell, cleaning and cutting the eggshell membrane to a required size; then, preparing an egg white base gel electrolyte solution formed by egg white, water and neutral salt; placing the cut eggshell membrane into the egg white base gel electrolyte solution for more than 10 mins; wiping unnecessary electrolyte solution on the surface of the eggshell membrane to obtain an egg white base gel electrolyte; and assembling the egg white gel electrolyte into an electric double-layer capacitor. The method is simple and environment friendly; and by utilizing affinity between the egg white and the eggshell membrane as well as gel property of the egg white in increasing viscosity of the electrolyte, the eggshell membrane is allowed to absorb larger amount of electrolyte solution, so that internal resistance of the capacitor is reduced, ionic conduction is improved, and specific capacitance of the capacitor is improved.

The invention provides a method for preparing a positive electrode material of a lithium-sulfur battery modified by carbon quantum dots, and belongs to the field of preparation of the positive electrode material of a lithium-sulfur battery. The present invention uses polyethyleneimine surface-functionalized carbon quantum dots for the preparation of lithium-sulfur battery cathodes, utilizes the adsorption of polyethyleneimine on polysulfide compounds, suppresses the shuttle effect during battery charging and discharging, and ensures lithium-sulfur The long-term cycle performance of the battery. The preparation method of the positive electrode material of the carbon quantum dot modified lithium-sulfur battery disclosed in the present invention has the characteristics of simple and convenient process, and can significantly improve the capacity, rate and cycle performance of the lithium-sulfur battery under the working conditions of high load and high current density. The field of sulfur batteries has potential application value.

The invention relates to a nitrogen-doped porous carbon catalyst prepared from potatoes and preparation and application of the catalyst. A preparation method of the catalyst comprises the following steps: 1) pretreating potatoes so as to obtain a potato paste; 2) carrying out high-temperature carbonization on the potato paste so as to obtain a nitrogen-doped carbon material; 3) mixing the nitrogen-doped carbon material with an activator, and carrying out high-temperature calcining activation so as to obtain an activation product; 4) removing excessive activator, thereby obtaining the nitrogen-doped porous carbon catalyst. The catalyst can be used as a fuel battery cathode catalyst for catalyzing oxygen reduction reactions. Compared with the prior art, the preparation method provided by theinvention is simple to operate, low in cost and convenient in large-scale industrial production; the prepared catalyst is of a multi-stage pore structure, has a high specific surface area and porosity, has an adjustable nitrogen element content and excellent ORR (Oxygen Reduction Reaction) electro-catalytic properties.

The invention belongs to the field of new energy materials and electrochemistry, and particularly relates to a preparation method of a high-rate monox-based lithium electric anode material. Accordingto the method, a sol-gel method and a carbon thermal reduction method are adopted to prepare a monox-carbon / graphene material with electrochemical activity, then dispersed fast ion conductor lithiumsilicate is prepared on the surface of the monox-carbon material through spin wrapping and thermal treatment, and finally the monox-carbon@lithium silicate / graphene material is obtained. The fast ionconductor lithium silicate can effectively accelerate the ion transport during charging and discharging of a composite material and accelerate the reaction kinetics of an electrode. The in-situ introduction of the flexible graphene during preparation can effectively buffer the volume change caused by the lithium deintercalation of monox in a cyclic process and improve the structural stability ofthe electrode. The preparation method of the high-rate monox-based lithium electric anode material has the advantages that the designed material has higher rate characteristics and good cycle stability; the preparation process has higher controllability and can be applied to the preparation of other high-performance electrode materials.

The present application provides an adhesive composition for a foldable display, an adhesive film using the same, and a foldable display comprising the same, the adhesive composition comprising: a heat curable resin; an ionic salt; A joint agent wherein the adhesive composition for a foldable display has 10 at -30°C and 60°C after curing 4 Pa to 10 6 Storage modulus in Pa.

The invention provides a lithium-sulfur battery positive copolymer sulfur material. The lithium-sulfur battery positive copolymer sulfur material is prepared through steps as follows, (1), sublimed sulfur powder and organic polymerization agent are collected to obtain uniform mixture through grinding, and the organic polymerization agent is nitrile organic substance; (2), the uniform mixture of the sublimed sulfur and the organic polymerization agent is sealed in a container under the high temperature condition and is insulated and stirred; and (3), the copolymerized sulfur obtained in the step (2) is pulverized to obtain positive electrode copolymerized sulfur particles. The invention further provides a lithium-sulfur battery made from the lithium-sulfur battery positive copolymer sulfurmaterial. The lithium-sulfur battery positive copolymer sulfur material is advantaged in that preparation requirements can be met through simple heating equipment, and the preparation process has characteristics of convenient operation and simple process. The preparation method is advantaged in that chemical bonding between the organic matter and the sulfur is produced through bond opening reaction of nitrile compounds'unique carbon-nitrogen triple bond and the 8-membered ring structure of the sublimated sulfur at the high temperature, and the polymeric sulfur copolymer can be formed.