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A kind of modified xanthan gum water-based binder and preparation method thereof

A technology of water-based binder and xanthan gum, applied in structural parts, non-aqueous electrolyte batteries, electrical components, etc., can solve the problems of poor practicability, achieve high tap density, inhibit volume expansion, reduce viscosity and surface tension Effect

Active Publication Date: 2021-05-04
广州市乐基智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the low-concentration, high-viscosity characteristics of xanthan gum and the problem of poor practicability, and provides a modified xanthan gum water-based binder

Method used

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  • A kind of modified xanthan gum water-based binder and preparation method thereof
  • A kind of modified xanthan gum water-based binder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A modified xanthan gum water-based binder, the specific steps of its preparation method are as follows: configure a deionized aqueous solution with a mass fraction of 1 wt% potassium chloride, slowly add xanthan gum at a stirring speed of 200 rpm, and stir for 1 hour to obtain xanthan gum wherein, the mass fraction of xanthan gum in the solution system is controlled to be 15wt%; then continue to add polyethylene glycol and styrene-butadiene rubber in turn, stir for 3h at a speed of 200rpm, and control the mass fraction of polyethylene glycol and styrene-butadiene rubber The mass fractions in the solution system are 5wt% and 4wt%, respectively; then continue to add sodium lauryl sulfate to reduce the viscosity and surface tension of the system, stir at a speed of 100rpm for 1h, and obtain a xanthan gum water-based solution with a mass fraction of 25wt%. binder solution.

[0028] Mix the xanthan gum aqueous binder solution obtained in Example 1, lithium iron phosphate, an...

Embodiment 2

[0032] A modified xanthan gum water-based binder, the specific steps of the preparation method are as follows: configure a deionized aqueous solution with a mass fraction of 1 wt% potassium hydroxide, slowly add xanthan gum at a stirring speed of 200rpm, stir for 1-2h to obtain yellow gum The pre-dispersion of raw gum, wherein the mass fraction of xanthan gum in the solution system is controlled to be 18wt%; then polyethylene glycol and styrene-butadiene rubber are added successively, stirred for 3h at a speed of 200rpm, and polyethylene glycol and styrene-butadiene rubber are controlled to The mass fractions in the solution system are 5wt% and 4wt%, respectively; then continue to add sodium dodecylbenzenesulfonate to reduce the viscosity and surface tension of the system, stir at a speed of 100rpm for 1h, and obtain a mass fraction of 28wt% modified xanthogen Glue-based binder solution.

[0033] The xanthan gum water-based binder solution obtained in Example 2, lithium iron p...

Embodiment 3

[0036] A modified xanthan gum water-based binder, the specific steps of its preparation method are as follows: configure a deionized aqueous solution with a mass fraction of 1wt% sodium chloride, slowly add xanthan gum at a stirring speed of 200rpm, stir for 1-2h to obtain yellow gum The pre-dispersion of raw gum, wherein the mass fraction of xanthan gum in the solution system is controlled to be 20wt%; then polyethylene glycol and styrene-butadiene rubber are added successively, stirred for 3h at a speed of 200rpm, and polyethylene glycol and styrene-butadiene rubber are controlled to The mass fractions in the solution system are 5wt% and 4wt% respectively; continue to add polyvinyl alcohol to reduce the viscosity and surface tension of the system, stir at a speed of 100rpm for 1h, and obtain a xanthan gum water-based binder with a mass fraction of 30wt% solution.

[0037] Mix the xanthan gum water-based binder solution obtained in Example 3, lithium iron phosphate, and acety...

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Abstract

The invention discloses a modified xanthan gum water-based binder, which is composed of xanthan gum, auxiliary dispersant and surfactant in a certain proportion, and the auxiliary dispersant is polyethylene glycol, styrene-butadiene rubber, The inorganic salt is composed in a certain proportion, and the surfactant is one or more of sodium lauryl sulfate, sodium dodecylbenzenesulfonate, polyvinyl alcohol, etc.; its preparation method includes the following steps: The dispersant disperses the xanthan gum evenly, and reduces the viscosity of the xanthan gum solution system through the surfactant. The modified xanthan gum water-based binder of the present invention can be used in electrode slurry, and has the characteristics of strong adhesion and good coating effect; and the introduction of a large amount of linear fat long chains, the vibration of the prepared lithium battery electrode material High density and good cycle performance.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a modified xanthan gum water-based binder and a preparation method. Background technique [0002] The electrode material of a lithium battery is generally composed of an active material, a conductive agent, and a binder. Among them, the binder plays the role of binding the active material and the conductive agent to the current collector, which directly affects the performance of the lithium battery. At present, the binders used in lithium batteries are divided into water-based binders and oil-based binders according to the solvent category, among which oil-based binders include polyvinylidene fluoride, polytetrafluoroethylene, polyamide, etc.; water-based binders mainly There are polyacrylic acid, polyvinyl alcohol, sodium hydroxymethyl cellulose-styrene butadiene rubber, xanthan gum, etc. [0003] Since the water-based adhesive does not use organic solvents, it is more friendly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M10/052
CPCH01M4/622H01M10/052Y02E60/10
Inventor 罗泰峰
Owner 广州市乐基智能科技有限公司