Unlock instant, AI-driven research and patent intelligence for your innovation.
A positive electrode conductive coating that reduces the extension of rolled pole pieces and its preparation method
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A conductive coating and positive electrode technology, which is applied in the field of positive electrode conductive coating and its preparation to reduce the extension of the rolled pole piece, can solve the problems of no improvement in the roll pressure of the positive pole piece, achieve industrial operation, suppress deformation of aluminum foil, and strengthen anti-corrosion The effect of shapeshifting ability
Active Publication Date: 2022-03-29
江苏海基新能源股份有限公司
View PDF2 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0005] Chinese patent CN 108511689A discloses a lithium-ion battery positive electrode sheet containing a conductive coating and its preparation method. In this invention, a special conductive coating is coated on the current collector, and the conductive coating is cured by conductive paste. Its conductive paste includes: composite carbon source, binder, dispersant, organic solvent, and its conductive coating can greatly improve the adhesion of the pole piece and enhance the conductivity, but it does not improve the roll pressure of the positive pole piece.
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0032] A positive electrode conductive coating that reduces the extension of rolled pole pieces, the conductive coating is cured by conductive paste, and the conductive paste includes conductive graphite KS-6, single-wall carbon nanotubes, Ketjen black, PVAc Emulsion, PTFE emulsion and deionized water are prepared.
[0033] Wherein, the amount of conductive graphite KS-6 is 1wt% of the solvent amount.
[0034] Ketjen black consumption is 1wt% of solvent consumption.
[0036] The solid content of the PTFE emulsion is 20wt%, and the consumption is 30wt% of the solvent consumption.
[0037] The solid content of the PVAc emulsion is 54wt%, and the consumption is 10wt% of the solvent consumption.
[0038] A method for preparing a positive electrode conductive coating that alleviates the extension of rolled pole pieces, comprising the followi...
Embodiment 2
[0046] A positive electrode conductive coating that reduces the extension of the rolled pole piece, the conductive coating is solidified by a conductive paste, and the conductive paste includes graphene, single-walled carbon nanotubes, Ketjen black, PVAc emulsion, PTFE emulsion and deionized water.
[0047] Wherein, graphene consumption is 1wt% of solvent consumption.
[0048] Ketjen black consumption is 1.5wt% of solvent consumption.
[0049] The solid content of the single-walled carbon nanotube water dispersion is 1wt%, and the dosage is 1wt% of the solvent dosage.
[0050] The solid content of the PTFE emulsion is 20wt%, and the consumption is 50wt% of the solvent consumption.
[0051] The solid content of the PVAc emulsion is 54wt%, and the consumption is 15wt% of the solvent consumption.
[0052] A method for preparing a positive electrode conductive coating that alleviates the extension of rolled pole pieces, comprising the following steps:
[0053] (1) Add 1.5Kg of...
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
Login to View More
Abstract
The invention relates to a positive conductive coating for reducing the extension of a rolled pole piece and a preparation method thereof. The conductive coating is formed by curing a conductive paste, and the conductive paste includes a conductive agent, a binder, and a solvent. The conductive Agent is the mixture of any one in conductive graphite KS-6, graphene and Ketjen black, single-walled carbon nanotubes, and described binding agent is the mixture of polytetrafluoroethyleneemulsion and polyvinyl acetateemulsion, and described The solvent is deionized water. The positive electrodeconductive coating of the present invention can reduce the extension of the pole piece when the positive pole is rolled, and improve the problem of the pole pieces being broken during the rolling process of the positive pole and during the pinch stretching process after rolling.
Description
technical field [0001] The invention belongs to the technical field of lithiumion batteries, and in particular relates to a positive electrode conductive coating for reducing the extension of rolled pole pieces and a preparation method thereof. Background technique [0002] In recent years, lithiumiron phosphate power batteries have been favored by lithium battery experts around the world due to their absolute safety and reliability, long cycle life, and stable discharge platform, and have achieved rapid development. However, lithium iron phosphate as the positive active material The conductivity is poor, so when preparing the positive electrode sheet, a layer of 1-2 μm conductive coating is generally pre-coated on the surface of the aluminum foilcurrent collector to promote electronic conduction between the active material coating and the aluminum foilcurrent collector. [0003] The existing positive electrode primer conductive coating is generally composed of an organi...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More