CN107359311A - A kind of method for improving negative electrode of lithium ion battery water paste stability - Google Patents
A kind of method for improving negative electrode of lithium ion battery water paste stability Download PDFInfo
- Publication number
- CN107359311A CN107359311A CN201610309016.XA CN201610309016A CN107359311A CN 107359311 A CN107359311 A CN 107359311A CN 201610309016 A CN201610309016 A CN 201610309016A CN 107359311 A CN107359311 A CN 107359311A
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- CN
- China
- Prior art keywords
- water paste
- negative electrode
- complexing agent
- lithium ion
- ion battery
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a kind of method for improving negative electrode of lithium ion battery water paste stability, concretely comprise the following steps：The complexing agent of deionized water quality 0.025 ~ 0.1% is incorporated as in negative pole water paste and is stirred, the complexing agent is at least one of disodium ethylene diamine tetraacetate, cresols, ethylenediamine tetraacetic methene sodium phosphate.With the addition of in original negative pole water paste to the present invention property made can suppress cellulose ether（CMC）The complexing agent to be reacted with foreign metal ion, and species and addition to complexing agent are defined, on the basis of battery performance is ensured, decline too fast problem to efficiently solve slurry viscosity during storage, processing step is simple, easy to operate.
Description
Technical field
The present invention relates to technical field of lithium-ion battery, improves negative electrode of lithium ion battery water paste more particularly, to one kind
The method of stability.
Background technology
Existing conventional negative electrode of lithium ion battery water paste is generally all containing negative electrode active material, binding agent, macromolecule thickening
The materials such as agent (cellulose ether), deionized water, in industrial processes, streamlined production operation typically requires electrode slurry
Stay longer on a production line, generally 12 hours.In the meantime, slurry viscosity fall off rate is big, or even occurs to sink
Drop, can influence Stability of Slurry, so as to produce counter productive to the uniformity of battery performance, influence product quality.
And still can not thoroughly solve the problems, such as that viscosity decline is fast by optimizing the preparation process condition of negative pole water paste at present, because
It is the task of top priority that how this, which solves the settlement issues of negative pole water paste in process of production,.
For example, application publication number CN104795541A, data of publication of application 2015.07.22 Chinese patent disclose a kind of lithium
Ion battery cathode size preparation method, the mixture of Delanium and soft carbon using 90~95 parts by weight are used as negative electrode active
Material, adds the CMC of 0.5~1 parts by weight, the aqueous binder LA133 of 1~2 parts by weight, and 0.5~1.5 parts by weight are led
Electric agent SP, the SBR of 2~3 parts by weight, is uniformly mixing to obtain cathode size in agitator.Slurry made from the preparation method
Still exist viscosity decline it is fast, the problem of free settling.
The content of the invention
The present invention be in order to solve the negative electrode of lithium ion battery water paste viscosity of prior art decline it is fast, the problem of free settling,
It is simple to provide a kind of processing step, it is easy to operate, Stability of Slurry can be significantly improved, slurry is effectively solved and is glued during storage
The method that degree declines the improvement negative electrode of lithium ion battery water paste stability of too fast problem.
To achieve these goals, the present invention uses following technical scheme：
A kind of method of improvement negative electrode of lithium ion battery water paste stability of the present invention, is concretely comprised the following steps：In negative pole water paste
Be incorporated as the complexing agent of deionized water quality 0.025~0.1% and stir, the complexing agent be disodium ethylene diamine tetraacetate,
At least one of cresols, ethylenediamine tetraacetic methene sodium phosphate.Conjecture contains cellulose ether in the present inventor's production process
(CMC) the reason for negative pole water paste occurs caking, settled is likely to be cellulose ether (CMC) and foreign ion
React, cause cellulose ether (CMC) to reunite so as to cause slurry viscosity to decline, therefore creatively in original negative pole water
With the addition of in property slurry can suppress cellulose ether (CMC) and complexing agent that foreign metal ion reacts, pass through complexing agent
React to form molecular complex with foreign metal ion, reunion shadow is produced to cellulose ether (CMC) to eliminate foreign metal ion
Ring, pass through the strict screening and the strict control of complexing agent addition to complexing agent, inventor's final choice ethylenediamine tetra-acetic acid
At least one of disodium, cresols, ethylenediamine tetraacetic methene sodium phosphate are used as complexing agent, and addition must be strict controlled in from
Sub- water quality 0.025~0.1%, for negative pole water paste, inherently a kind of impurity of complexing agent, its addition can not mistake
It is more, otherwise the chemical properties such as the capacity of battery can be impacted, but addition can not be very few, otherwise just can not play suppression
Negative pole water paste viscosity declines the problem of too fast.
Preferably, the negative pole water paste is made up of the component of following mass percent：45~50% negative electrode active materials,
2~3% aqueous binders, 1~2% thickener, 0~1% conductive agent, surplus are deionized water.
Preferably, the negative electrode active material is the one or more in Delanium, native graphite, soft carbon and hard carbon,
The aqueous binders are butadiene-styrene latex, and the thickener is cellulose ether, the conductive agent be conductive carbon black, CNT,
One or more in flaky graphite, gas-phase growth of carbon fibre.
Therefore, the invention has the advantages that：Provide a kind of improvement negative electrode of lithium ion battery water paste stability
Method, creatively with the addition of in original negative pole water paste can suppress cellulose ether (CMC) and foreign metal ion hair
The complexing agent of raw reaction, and the species and addition to complexing agent are defined, on the basis of battery performance is ensured, with
Efficiently solve slurry viscosity during storage and decline too fast problem, processing step is simple, easy to operate.
Embodiment
Below by embodiment, the present invention will be further described.
In the present invention, if not refering in particular to, all percentages are unit of weight, and all devices and raw material are commercially available
Or the industry is conventional, the method in following embodiments, is this area conventional method unless otherwise instructed.
Embodiment 1
The complexing agent ethylenediamine tetraacetic methene sodium phosphate (EDTMPS) of deionized water quality 0.025% is incorporated as in negative pole water paste simultaneously
Stir, wherein negative pole water paste is made up of the component of following mass percent：45% negative electrode active material artificial stone
Ink, 2% aqueous binders butadiene-styrene latex (SBR), 1% thickener cellulose ether, surplus are deionized water, negative pole water paste
Preparation method use the conventional method of the art, therefore do not repeat herein, similarly hereinafter.
Embodiment 2
The complexing agent disodium ethylene diamine tetraacetate of deionized water quality 0.1%, wherein negative pole water paste are incorporated as in negative pole water paste
It is made up of the component of following mass percent：50% negative electrode active material native graphite, 3% aqueous binders butadiene-styrene latex
(SBR), 2% thickener cellulose ether, 1% conductive agent conductive carbon black, surplus is deionized water.
Embodiment 3
Complexing agent (the m of deionized water quality 0.03% is incorporated as in negative pole water pasteDisodium ethylene diamine tetraacetate∶mCresols=1: 1), wherein negative pole
Water paste is made up of the component of following mass percent：48% negative electrode active material (mSoft carbon∶mHard carbon=2: 1), 2.5% is water-based viscous
Tie agent butadiene-styrene latex (SBR), 1.5% thickener cellulose ether, 0.5% conductive agent (mConductive carbon black∶mCNT∶mGas-phase growth of carbon fibre=1: 1: 1),
Surplus is deionized water.
Comparative example
Negative pole water paste formula such as embodiment 1, does not attach complexing agent.
The negative pole water paste rate of change in viscosity that each embodiment and comparative example obtain is tested during standing, test result is such as
Under：
As seen from the above table, can effectively solve slurry viscosity during storage using the invention of the present invention and decline too fast problem, improve negative pole
The stability of water paste.
Embodiment described above is a kind of preferable scheme of the present invention, not makees any formal limit to the present invention
System, there are other variants and remodeling on the premise of without departing from the technical scheme described in claim.
Claims (3)
- A kind of 1. method for improving negative electrode of lithium ion battery water paste stability, it is characterised in that concretely comprise the following steps：The complexing agent of deionized water quality 0.025 ~ 0.1% is incorporated as in negative pole water paste and is stirred, the complexing agent is at least one of disodium ethylene diamine tetraacetate, cresols, ethylenediamine tetraacetic methene sodium phosphate.
- 2. a kind of method for improving negative electrode of lithium ion battery water paste stability according to claim 1, it is characterised in that the negative pole water paste is made up of the component of following mass percent：45 ~ 50% negative electrode active materials, 2 ~ 3% aqueous binders, 1 ~ 2% thickener, 0 ~ 1% conductive agent, surplus are deionized water.
- A kind of 3. method for improving negative electrode of lithium ion battery water paste stability according to claim 2, it is characterized in that, the negative electrode active material is the one or more in Delanium, native graphite, soft carbon and hard carbon, the aqueous binders are butadiene-styrene latex, the thickener is cellulose ether, and the conductive agent is the one or more in conductive carbon black, CNT, flaky graphite, gas-phase growth of carbon fibre.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610309016.XA CN107359311A (en) | 2016-05-10 | 2016-05-10 | A kind of method for improving negative electrode of lithium ion battery water paste stability |
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| CN201610309016.XA CN107359311A (en) | 2016-05-10 | 2016-05-10 | A kind of method for improving negative electrode of lithium ion battery water paste stability |
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| CN201610309016.XA Pending CN107359311A (en) | 2016-05-10 | 2016-05-10 | A kind of method for improving negative electrode of lithium ion battery water paste stability |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301252A (en) * | 2018-09-25 | 2019-02-01 | 河南师范大学 | A kind of preparation method of chelating agent surface modification porous carbon materials |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101937983A (en) * | 2009-06-29 | 2011-01-05 | 上海比亚迪有限公司 | Lithium ion battery negative slurry and lithium ion battery |
| CN102163740A (en) * | 2010-02-17 | 2011-08-24 | 三洋电机株式会社 | Non-aqueous electrolyte secondary battery |
-
2016
- 2016-05-10 CN CN201610309016.XA patent/CN107359311A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101937983A (en) * | 2009-06-29 | 2011-01-05 | 上海比亚迪有限公司 | Lithium ion battery negative slurry and lithium ion battery |
| CN102163740A (en) * | 2010-02-17 | 2011-08-24 | 三洋电机株式会社 | Non-aqueous electrolyte secondary battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301252A (en) * | 2018-09-25 | 2019-02-01 | 河南师范大学 | A kind of preparation method of chelating agent surface modification porous carbon materials |
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Application publication date: 20171117 |
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