Efficient conductive agent

A conductive agent and high-efficiency technology, which is applied in the field of battery material preparation, can solve the problems of conductive agents such as the short-term conductive effect, and achieve the effects of facilitating dispersion, improving dispersion, and stabilizing electrical conductivity

Inactive Publication Date: 2019-04-16
徐冬
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a high-efficiency conductive agent for the current commonly used conductive agents that are easy to agglomerate and have a short-term conductive effect

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Efficient conductive agent

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] The preparation method of composite conductive component A comprises the steps:

[0033] (1) Take 4,4΄-diphenylmethane diisocyanate, polypropylene glycol, and N,N΄-dimethylformamide according to the mass ratio of 1:3~6:16 and mix them in a container at 70~85°C at 400~ Stir at 650r / min for 20~45min to obtain the prepolymer, mix and stir the prepolymer and methylfuranamine in an ice-water bath at a mass ratio of 8~15:1, and then heat up to 60~75°C at 3~6°C / min ℃, add bismaleimide with 20~35% of prepolymer mass, mix and stir, keep warm for 20~24h, and obtain self-repairing polyurethane material;

[0034] (2) According to the mass ratio of 1:0.1:12~20, take polyethyleneimine, auxiliary materials, and water, mix and stir, move to an ultrasonic oscillator and disperse ultrasonically at a frequency of 45~55kHz for 25~40min to obtain a dispersion, and take the dispersion according to its mass Add metal filler, pretreated steel slag, and self-repairing polyurethane material at ...

Embodiment 1

[0043] Reagent A: Mix oxalic acid and ethanol solution with a volume fraction of 70% at a mass ratio of 1:12 to obtain Reagent A.

[0044] Reagent B: Mix urea and sodium carbonate solution with a mass fraction of 15% at a mass ratio of 1:10 to obtain reagent B.

[0045] Metal filler: Mix nano-copper wire, flake copper powder, spherical copper powder and Glauber's salt according to the mass ratio of 5:1:4:1 to obtain the metal filler.

[0046] Feed solution: Mix aniline, pyrrole, and PBS buffer solution with a pH of 7.5 at a mass ratio of 4:1:15 to obtain a feed solution.

[0047] Auxiliary materials: Mix microcrystalline paraffin and isocyanate at a mass ratio of 7:1 to obtain auxiliary materials.

[0048] Pretreatment of steel slag: Take steel slag, camellia seed meal, fly ash, and water according to the mass ratio of 10:1:3:25, mix them with 500r / min magnetic force for 40min, filter, take the filter residue in a ball mill tank and mill at 350r / min for 1h, The ball abrasive...

Embodiment 2

[0061] Reagent A: Mix oxalic acid and ethanol solution with a volume fraction of 70% at a mass ratio of 1:15 to obtain Reagent A.

[0062] Reagent B: Mix urea and sodium carbonate solution with a mass fraction of 15% at a mass ratio of 1:13 to obtain reagent B.

[0063] Metal filler: Mix nano-copper wire, flake copper powder, spherical copper powder and Glauber's salt according to the mass ratio of 5:2:4:1 to obtain the metal filler.

[0064] Feed solution: Mix aniline, pyrrole, and PBS buffer solution with a pH of 7.8 at a mass ratio of 4:2:20 to obtain a feed solution.

[0065] Auxiliary materials: Mix microcrystalline paraffin and isocyanate at a mass ratio of 7:2 to obtain auxiliary materials.

[0066] Steel slag pretreatment: take steel slag, camellia oleifera seed meal, fly ash, and water in a mass ratio of 12:1:3:25, mix them with magnetic force at 700r / min for 50min, filter, take the filter residue in a ball mill tank and mill at 450r / min for 2h, The ball abrasive is...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
lengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses an efficient conductive agent, and belongs to the field of battery material preparation. A self-repairing polyurethane material is prepared from 4,4'-diphenylmethane diisocyanate, polypropylene glycol and the like as raw materials, intermolecular repulsion is improved, dispersity in the using process is improved in an auxiliary mode, agglomeration is avoided, conductive performance is stabilized, contact resistance generated in a system is reduced, and the conductive performance is further improved; pretreated steel slag is prepared from steel slag, camellia seed meal,fly ash and the like, tea saponin dissolved out of the camellia seed meal can play a good dispersion role, the flowability in the grinding process is improved, the dispersity is improved, and in the subsequent preparation process, the surfaces of the component particles can be coated with a layer of organic film, so that the agglomerated particles are dispersed again, the components are promoted to be kept in a dispersed state, and the agglomeration phenomenon between the conductive components is avoided. The conductive agent solves the problems that a common conductive agent is prone to caking and the conductive effect is not long at present.

Description

technical field [0001] The invention belongs to the field of battery material preparation, and in particular relates to a high-efficiency conductive agent. Background technique [0002] It can be seen from the working principle of lithium-ion batteries that the charging and discharging process of batteries requires the participation of lithium ions and electrons. Therefore, the electrodes of lithium-ion batteries must be a mixture of ions and electrons, and electrode reactions can only occur in electrolytes, conductive agent, active material interface. In lithium-ion batteries, the cathode active materials are mostly transition metal oxides or transition metal phosphates, most of which are semiconductors or insulators, and the conductivity is very poor. A conductive agent must be added to improve the conductivity; the conductivity of the anode graphite material is slightly better. However, in the process of charging and discharging for many times, the expansion and contract...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22
CPCH01B1/22
Inventor 徐冬黄春妹庞成荣
Owner 徐冬
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

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap