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A kind of preparation method of electrode material, battery and electrode material

A technology of electrode material and electrode active material, which is applied in the field of battery materials, can solve the problems that the ion diffusion rate cannot keep up, affect the charge and discharge rate, and the thickness of the electrode should not be too thick, so as to achieve easy mass production, low manufacturing cost, The effect of omitting the diaphragm

Active Publication Date: 2020-05-19
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The current common production method for secondary batteries is multi-layer winding or stacking, and the obtained battery is static, and the positive and negative electrodes are separated by a separator, and the production cost is relatively high.
In addition, in this battery structure, ion conduction only depends on diffusion, so the thickness of the electrode should not be too thick, otherwise the ion diffusion rate cannot keep up, which will affect the charge and discharge rate

Method used

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  • A kind of preparation method of electrode material, battery and electrode material
  • A kind of preparation method of electrode material, battery and electrode material
  • A kind of preparation method of electrode material, battery and electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0039] First, prepare Na 1.3 Fe[Fe(CN) 6] A low-density cathode material as a cathode active material.

[0040] S1: first mix 20 g of acrylamide, 0.1 g of methylenebisacrylamide, and 1 g of sodium 2-acrylamide-2-methylpropanesulfonate, and dissolve them in 75 ml of water.

[0041] S2: Add 120 grams of Na to the aqueous solution obtained in S1 1.3 Fe[Fe(CN) 6 ], 30 grams of conductive carbon black, 10 grams of foamable plastic microspheres (expanded microspheres), then add 0.1 gram of sodium bisulfite, 0.1 gram of sodium persulfate, and stir at room temperature to make a slurry.

[0042] S3: Place the slurry obtained in S2 in an environment of 35 degrees Celsius and continue to stir to initiate the polymerization reaction. Under the exothermic action of the polymerization reaction, the temperature of the system rises to 60 degrees Celsius, and the monomers in the system are polymerized into acrylamide / methylene Based bisacrylamide / 2-acrylamide-2-methylpropanesulfonate sodiu...

Embodiment 2

[0046] Preparation of NaTi 2 (PO 4 ) 3 Be the high-density negative electrode material of negative electrode active material, step and above-mentioned " prepare Na 1.3 Fe[Fe(CN) 6 ] As the positive electrode material of positive electrode active material " process is similar, just, in step S2, with 120 grams of Na 1.3 Fe[Fe(CN) 6 ] replaced with 140 g NaTi 2 (PO4) 3 As a negative electrode active material, no expandable plastic particles are added in the preparation process, and no microwave heating step is required.

Embodiment 3

[0048] The positive electrode material prepared in Example 1, the negative electrode material prepared in Example 2, and 200 milliliters of 1 mole per liter of Na 2 SO 4 The aqueous solution (aqueous electrolyte) is all placed in a container 4 with a diameter of 8 cm and a height of 14 cm. The bottom of the container 4 is a stainless steel plate, the side wall is polypropylene plastic, the top is a stainless steel cover, and a stirring rod penetrates into the container through the hole in the top. Under the action of gravity, the positive electrode material 1, the aqueous electrolyte solution 2 and the negative electrode material 3 are automatically divided into three layers from top to bottom. The stainless steel cover on the top can be used as the stainless steel current collector 6 of the positive electrode, and the stainless steel plate at the bottom can be used as the stainless steel current collector 6 of the negative electrode. Positive and negative electrode current ...

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Abstract

The invention discloses an electrode material, a battery and a preparation method for the electrode material, belonging to the field of batteries, which is a composite electrode material whose density is lower than that of an aqueous electrolyte, and which includes an electrode active material, a conductive material, and a binder And plastic foam, electrode active material has oxidation-reduction reaction activity, can contribute to battery capacity, conductive material has electronic conductivity, binder is used to bond different materials into a whole, and cannot block the aqueous electrolyte and electrode activity Material contact; plastic foam used to reduce the overall density of the composite electrode material. The invention also discloses a battery comprising the above-mentioned electrode material, which is automatically divided into three layers of positive electrode material-electrolyte-negative electrode material or three layers of negative electrode material-electrolyte-positive electrode material from top to bottom. In the battery of the present invention, there is no diaphragm between the positive and negative electrodes, and the electrolyte can flow between the positive and negative electrodes by stirring to promote ion conduction.

Description

technical field [0001] The invention belongs to the field of battery materials, and more specifically relates to an electrode material, a battery and a preparation method of the electrode material. Background technique [0002] The effective use of new energy sources, such as solar energy and wind energy, is the hope of solving human energy problems. However, solar energy and wind energy have the characteristics of intermittent, fluctuating, and random, and cannot guarantee to match people's electricity demand in time. Therefore, energy storage technology is needed to store the electric energy generated by solar energy and wind energy, and then restore it when needed. freed. [0003] Among energy storage technologies, energy storage battery technology has the advantages of high energy efficiency and no geographical restrictions, and has become the key development target of countries all over the world. [0004] The performance requirements of batteries used as grid energy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/50H01M4/58H01M4/60H01M4/62H01M10/36H01M10/38
CPCY02E60/10Y02P70/50
Inventor 沈越黄云辉
Owner HUAZHONG UNIV OF SCI & TECH
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