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Application of alginate as a binder in the preparation of electrode sheets

A technology for preparing electrodes from alginate, which is applied to battery electrodes, circuits, electrical components, etc., to achieve the effects of small irreversible capacity loss, good cycle stability, and extended cycle life

Inactive Publication Date: 2011-12-14
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far there is no report of using it as a binder in the preparation of electrode sheets

Method used

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  • Application of alginate as a binder in the preparation of electrode sheets
  • Application of alginate as a binder in the preparation of electrode sheets
  • Application of alginate as a binder in the preparation of electrode sheets

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Application of sodium alginate as a binder in the preparation of electrode sheets. Utilize sodium alginate binding agent to prepare electrode sheet, comprise the steps:

[0031] (1) Get 2 grams of sodium alginate and dissolve it in 98 grams of water, fully stir to obtain a 2% uniform and viscous sodium alginate aqueous solution;

[0032] (2) Mix the prepared sodium alginate aqueous solution with 33.3 grams of spherical natural graphite electrode material (at this time, the dry weight of the sodium alginate binder is 6% of the dry weight of the electrode), 4000 rpm Stir fully at high speed to make the slurry fully mixed evenly;

[0033] (3) Control the viscosity of the slurry at 800~1000 centipoise;

[0034] (4) The prepared slurry is evenly coated and dried on a coating machine, and the thickness of the electrode after drying is between 40 and 120 mm;

[0035] (5) Use a pair of roller presses to control the pressure of 10 to 20 atmospheres to press the prepared elect...

Embodiment 2

[0053] Application of lithium alginate as a binder in the preparation of electrode sheets. Utilize lithium alginate binding agent to prepare electrode sheet, comprise the steps:

[0054] (1) Get 4 gram lithium alginate and be dissolved in 96 grams of water, fully stir and make 4% uniform viscous lithium alginate aqueous solution;

[0055] (2) Mix the prepared lithium alginate aqueous solution with 66.7 grams of spherical natural graphite electrode material (at this time, the dry weight of the lithium alginate binder is 6% of the dry weight of the electrode), 4000 rpm Stir fully at high speed to make the slurry fully mixed evenly;

[0056] (3) Control the viscosity of the slurry to be 800~1000 centipoise;

[0057] (4) The prepared slurry is evenly coated and dried on a coating machine, and the thickness of the electrode after drying is between 40 and 120 mm;

[0058] (5) Use a pair of roller presses to control the pressure of 10 to 20 atmospheres to press the prepared electr...

Embodiment 3

[0060] Application of potassium alginate as a binder in the preparation of electrode sheets. Utilize potassium alginate binding agent to prepare electrode sheet, comprise the steps:

[0061] (1) Get 3 grams of potassium alginate and dissolve it in 97 grams of water, fully stir to obtain 3% evenly viscous potassium alginate aqueous solution;

[0062] (2) Mix the prepared potassium alginate aqueous solution with 50 grams of spherical natural graphite electrode material (at this time, the dry weight of the lithium alginate binder is 6% of the dry weight of the electrode), 4000 rpm Stir fully at high speed to make the slurry fully mixed evenly;

[0063] (3) Control the viscosity of the slurry to be 800~1000 centipoise;

[0064] (4) The prepared slurry is evenly coated and dried on a coating machine, and the thickness of the electrode after drying is between 40 and 120 mm;

[0065] (5) Use a pair of roller presses to control the pressure of 10 to 20 atmospheres to press the prep...

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Abstract

The invention discloses the application of alginate as a binder in preparing electrode sheets. In the present invention, alginate is used as a binder to prepare electrode sheets. The binder has good water solubility and good bonding effect, and the carbon negative electrode sheet prepared by it has good mechanical properties, low initial irreversible capacity, and high reversible capacity. The specific energy is high, and the cycle stability of the electrode is good.

Description

technical field [0001] The invention relates to the application of alginate, in particular to the application of alginate as a binder in preparing electrode sheets. Background technique [0002] Lithium-ion battery is currently the most widely used battery in modern digital products such as mobile phones and notebook computers. It has the advantages of high voltage, high specific energy, long cycle life, good safety performance, and small self-discharge. It is a representative of modern high-performance batteries. , has been widely used. [0003] The electrode sheet is one of the important components of the lithium-ion battery, and the binder is an essential and important component in the process of making the electrode sheet. Not only the price of the binder affects the cost of the electrode sheet, but also the properties of the binder affect many properties of the electrode to varying degrees. If the mechanical properties of the binder are not good, it is easy to cause th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62
CPCY02E60/12Y02E60/10
Inventor 郑洪河
Owner SUZHOU UNIV
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