Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

42results about How to "Product properties are stable" patented technology

Hard carbon negative electrode material, its preparation method and application

The invention provides a preparation method of a hard carbon negative electrode material. The method comprises the steps of: (1) subjecting a high molecular polymer and a cross-linking agent to crosslinking and polymerization reactions so as to obtain a cross-linked polymer; (2) conducting crushing and screening; (3) under the protection of an inert gas, carrying out pre-carbonization treatment at a temperature of 400-600DEG C, performing cooling to room temperature, and carrying out crushing and screening; (4) under the protection of an inert gas, carrying out carbonization treatment at a temperature of 1000-1600DEG C, thus obtaining a hard carbon negative electrode material. The high molecular polymer is asphalt, epoxy resin or phenolic resin. The invention also provides a hard carbon negative electrode material prepared by the method as well as its application as a lithium ion battery negative electrode material. The preparation method of the invention is simple and practicable, and has easily available and cheap raw materials. The hard carbon negative electrode material provided in the invention has the advantages of: good comprehensive performance; good electrochemical performance; good cycle performance; good high current charge-discharge performance; good security; good adaptability to electrolyte and other additives; and stable product property, with almost no difference among batches.
Owner:SHANGHAI SHANSHAN TECH CO LTD

Composite mesophase negative electrode material, lithium ion secondary battery, preparation method and application

The invention discloses a composite intermediate phase negative electrode material, a lithium ion secondary battery, a preparation method and application. The preparation method comprises the following step: carrying out catalytic graphitization treatment on a blocky mixture containing uncalcined green coke powder, mesocarbon microbead green pellets, a graphitization catalyst and an adhesive capable of being graphitized, wherein the particle size D50 of the uncalcined green coke powder is 1-50 [mu] m, and the mass ratio of the uncalcined green coke powder to the mesocarbon microbead green pellets is (0.25-1): 1. The composite intermediate-phase negative electrode material prepared by the method is large in discharge capacity and good in cycle performance; a prepared button cell has excellent comprehensive performance, the discharge capacity is 365 mAh/g or above, the cycle performance is good (300 cycles, the capacity is maintained to be greater than or equal to 90%), the safety is better (130 DEG C/60 minutes, explosion and expansion are avoided), the adaptability to electrolytes and other additives is better, the preparation method is simple and feasible, and the preparation method is suitable for industrial production.
Owner:SHANGHAI SHANSHAN TECH CO LTD

Gas-solid method production technology of cellulose mixed ether

InactiveCN110804103AEtherification substitution uniformity is goodProduct properties are stableEtherCellulose pulp
The invention relates to the technical field of cellulose mixed ethers, and concretely relates to a gas-solid method production technology of cellulose mixed ether. The gas-solid method production technology of the cellulose mixed ether comprises the following steps: crushing cellulose pulp to obtain powdery cellulose; adding the powdery cellulose into a reactor, adding an alkali liquor, an etherifying agent and dimethyl ether, and raising the temperature at a constant speed for a reaction; recovering the unreacted etherifying agent and dimethyl ether after the reaction is finished, and then adding hydrochloric acid to neutralize; and adding water into the neutralized material to wash, and carrying filtering, leaching and steam filter pressing, and crushing and drying the obtained materialto obtain the finished product cellulose mixed ether. The gas-solid method production technology of the cellulose mixed ether is simple and efficient, solves the problems of long reaction time, low yield and low production efficiency of conventional technologies, and has he advantages of good etherification substitution uniformity, uniform and stable product properties, reduction of side reactions, increase of the utilization rate of the etherifying agent, and saving of the production cost.
Owner:山东赫达集团股份有限公司

Gold nanorod self-assembly body as well as preparation method and application thereof

The invention provides a gold nanorod self-assembly body as well as a preparation method and application thereof. The preparation method of the gold nanorod self-assembly body comprises the followingsteps of adding an ethylene diamine tetraacetic acid solution and a sodium hydroxide solution into a gold nanorod solution, and stirring the mixed solution for 20-40 seconds. According to the preparation method, the gold nanorod self-assembly body is prepared by adding the ethylene diamine tetraacetic acid solution and the sodium hydroxide solution into the gold nanorod solution and stirring the mixed solution, the modification and assembly are completed in one step, only 20-40 seconds are needed, so that the method is simple and rapid; the addition amount of the ethylene diamine tetraacetic acid solution and the addition amount of the sodium hydroxide solution can be adjusted, so that the gold nanorod self-assembly bodies with two modes of shoulder-by-shoulder and tail-to-tail are obtained, the product property is stable, and the application prospect is wide; and especially the various gold nanorod assembly bodies with different thermion service life can be prepared, the service lifeof thermions is modulated by changing the assembly structure, so that the property of the ultrafast optical switch is optimized.
Owner:THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA

A kind of hard carbon negative electrode material and its preparation method and application

The invention provides a preparation method of a hard carbon negative electrode material. The method comprises the steps of: (1) subjecting a high molecular polymer and a cross-linking agent to crosslinking and polymerization reactions so as to obtain a cross-linked polymer; (2) conducting crushing and screening; (3) under the protection of an inert gas, carrying out pre-carbonization treatment at a temperature of 400-600DEG C, performing cooling to room temperature, and carrying out crushing and screening; (4) under the protection of an inert gas, carrying out carbonization treatment at a temperature of 1000-1600DEG C, thus obtaining a hard carbon negative electrode material. The high molecular polymer is asphalt, epoxy resin or phenolic resin. The invention also provides a hard carbon negative electrode material prepared by the method as well as its application as a lithium ion battery negative electrode material. The preparation method of the invention is simple and practicable, and has easily available and cheap raw materials. The hard carbon negative electrode material provided in the invention has the advantages of: good comprehensive performance; good electrochemical performance; good cycle performance; good high current charge-discharge performance; good security; good adaptability to electrolyte and other additives; and stable product property, with almost no difference among batches.
Owner:SHANGHAI SHANSHAN TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products