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Carbon black modified water-based SBR lithium ion battery binder and preparation method thereof

A lithium-ion battery and binder technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as unfavorable large-scale application, a large amount of manpower and material resources, and long time period, so as to prevent powder loss and increase energy density , long cycle life effect

Inactive Publication Date: 2018-09-28
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the development of new material systems must invest a lot of manpower and material resources, the time period is long and the cost is high
On the other hand, binders and conductive agents with better performance often mean higher costs, which is not conducive to large-scale application in industrial production

Method used

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  • Carbon black modified water-based SBR lithium ion battery binder and preparation method thereof
  • Carbon black modified water-based SBR lithium ion battery binder and preparation method thereof
  • Carbon black modified water-based SBR lithium ion battery binder and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The present invention proposes a kind of preparation method of carbon black modified water system SBR lithium ion battery binder, comprises the following steps:

[0026] S1. Add 9.45g of sodium stearate to 186g of deionized water, and stir at 60°C until completely dissolved, add 92.1g of disproportionated potassium abietate into 400g of deionized water and stir until fully dissolved, and then dissolve the dissolved hard The sodium fatty acid solution is poured into the disproportionated potassium rosinate solution, and stirred in a water bath at 50°C, and this part of the solution is used as an emulsified solution;

[0027] S2. Slowly add 100g super P into the emulsified solution, and use a shearing machine to shear and disperse for about 30 minutes to fully emulsify super P;

[0028] S3. Add 0.06g of ferrous sulfate, 0.2111g of white block, 0.2015g of disodium EDTA, 3.0102g of potassium chloride, and 0.0914g of sodium hydrosulfite into 50g of deionized water in turn, s...

Embodiment 2

[0031] The present invention proposes a kind of preparation method of carbon black modified water system SBR lithium ion battery binder, comprises the following steps:

[0032] S1. Add 3g of sodium stearate into 150g of deionized water, and stir at 60°C until completely dissolved, add 20g of sodium dodecylbenzenesulfonate into 150g of deionized water and stir until fully dissolved, and then dissolve well The sodium stearate solution is poured into the sodium dodecylbenzenesulfonate solution, and stirred in a water bath at 30°C, and this part of the solution is used as an emulsified solution;

[0033] S2. Slowly add 20 g of acetylene black into the emulsified solution, and use a shearing machine to shear and disperse for about 20 minutes to fully emulsify the acetylene black;

[0034] S3. Add 0.01g of ferrous sulfate, 0.0750g of disodium EDTA, and 1.0100g of potassium chloride to 20g of deionized water in turn, stir until completely dissolved, and record this solution as the re...

Embodiment 3

[0037] The present invention proposes a kind of preparation method of carbon black modified water system SBR lithium ion battery binder, comprises the following steps:

[0038] S1. Add 15g of sodium stearate into 300g of deionized water, and stir at 60°C until completely dissolved, add 160g of CTAB into 700g of deionized water and stir until fully dissolved, then pour the dissolved sodium stearate solution into into the CTAB solution, and stirred in a water bath at 80°C, this part of the solution is used as an emulsified solution;

[0039] S2. Slowly add 200g KS-6 into the emulsified solution, and use a shearing machine to shear and disperse for about 40 minutes to fully emulsify KS-6;

[0040]S3, sequentially add 0.2g sodium bisulfite, 4g saffron, 5g disodium EDTA, 20g potassium chloride, 1g sodium sulfate into 400g deionized water, stir until completely dissolved, and record this solution as reducing base solution;

[0041] S4, sequentially add 200g deionized water, reducin...

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Abstract

The invention discloses a carbon black modified water-based SBR lithium ion battery binder and a preparation method thereof, and relates to the technical field of a lithium ion battery binder, whereinthe binder is prepared through the following steps: using styrene and butadiene as raw materials; bonding the conductive carbon black on an SBR molecular chain through an in-situ emulsion polymerization method, wherein the preparation method comprises adding an aqueous solution of sodium stearate to an aqueous surfactant solution to obtain an emulsified solution; then adding carbon black to disperse to obtain a carbon black emulsion system; dissolving an reducibility initiator and electrolyte in deionized water to obtain a reducing solution; adding the deionized water, the reducing solution,a molecular weight regulator SD-12 and styrene to the carbon black emulsion system, vacuumizing to the negative pressure, and then adding butadiene, cooling, and adding an oxidizing initiator to initiate a polymerization reaction. The binder of the present invention is used for battery preparation. In the case that no conductive carbon black is additionally added, the battery has a high cycle capacity, thereby increasing the additive proportion of the active material, and indirectly increasing the energy density of the battery system.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery binders, in particular to a carbon black modified water-based SBR lithium ion battery binder and a preparation method thereof. Background technique [0002] The rapid development of new energy vehicle technology has put forward higher and higher requirements for power batteries. Compared with lead-acid batteries, nickel-metal hydride batteries, nickel-cadmium batteries and other batteries, lithium-ion batteries have high energy density, high discharge voltage, and no memory effect. They are an ideal power source for new energy vehicles. However, as the market's requirements for the mileage of new energy vehicles gradually increase, and the bottleneck of the capacity increase of the positive and negative active materials of lithium-ion batteries is limited, the method of using a small amount of high-efficiency inactive materials to reduce battery quality and indirectly increase battery ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M10/0525
CPCH01M4/62H01M4/622H01M4/625H01M10/0525Y02E60/10
Inventor 张二冬杨茂萍李道聪
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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