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A kind of electrode and preparation method thereof and lithium-ion capacitor battery

An electrode and electrode slurry technology, applied in battery electrodes, secondary batteries, non-aqueous electrolyte battery electrodes, etc., can solve the problems of difficult to meet industrialized large-scale production, long process, complicated preparation methods, etc., and achieve low internal resistance, The effect of low production cost and simple operation process

Active Publication Date: 2022-03-04
SHANGHAI AOWEI TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, although the above methods can obtain electrodes with better electrochemical performance, the preparation methods are relatively cumbersome and the process is long, which is difficult to meet the needs of industrialized mass production.

Method used

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  • A kind of electrode and preparation method thereof and lithium-ion capacitor battery
  • A kind of electrode and preparation method thereof and lithium-ion capacitor battery
  • A kind of electrode and preparation method thereof and lithium-ion capacitor battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] The present embodiment adopts the following method to prepare electrodes and lithium-ion capacitor batteries:

[0069] Preparation of positive electrode sheet:

[0070] A total of 600 grams of layered ternary material (LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 ), carbon nanotubes (CNT), conductive carbon black (Super-P), polyvinylidene fluoride (PVDF) and solvent 1-methyl-2-pyrrolidone (NMP) according to the weight ratio of 92:0.5:2.5:5 Mixing was performed to make a layer A electrode slurry close to the positive current collector. Among them, layered ternary materials (LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 ) with an average particle size of 5 μm.

[0071] A total of 600 grams of activated carbon, Super-P, and PVDF were mixed with the solvent NMP at a weight ratio of 90:5:5 to produce a layer B electrode slurry away from the positive current collector. Among them, the average particle size of activated carbon is 6μm, and the specific surface area is 550m 2 / g.

[0072] Apply the la...

Embodiment 2

[0082] The present embodiment adopts the following method to prepare electrodes and lithium-ion capacitor batteries:

[0083] Preparation of positive electrode sheet:

[0084] A total of 600 g of LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , CNT, Super-P, PVDF are mixed with the solvent NMP according to the weight ratio of 92:0.5:2.5:5 to make the A-layer electrode slurry close to the positive current collector. Among them, LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 The average particle size is 1 μm.

[0085] A total amount of 600 grams of activated carbon, Super-P, hydroxycellulose (CMC), styrene-butadiene rubber (SBR) is mixed with deionized water according to a weight ratio of 91:4.5:1.8:2.7 to make a battery far away from the positive electrode collector. B-layer plasma material. Among them, the average particle size of activated carbon is 1μm, and the specific surface area is 503m 2 / g.

[0086] Apply the layer A electrode slurry on both sides of the aluminum foil with a thickness of 20 μm,...

Embodiment 3

[0095] The present embodiment adopts the following method to prepare electrodes and lithium-ion capacitor batteries:

[0096] Preparation of positive electrode sheet:

[0097] A total of 600 grams of layered ternary material (LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 ), carbon nanotubes (CNT), conductive carbon black (Super-P), polyvinylidene fluoride (PVDF) and solvent 1-methyl-2-pyrrolidone (NMP) according to the weight ratio of 92:0.5:2.5:5 Mixing was performed to make a layer A electrode slurry close to the positive current collector. Among them, layered ternary materials (LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 ) has an average particle size of 10 μm.

[0098] A total of 600 grams of activated carbon, Super-P, and PVDF were mixed with the solvent NMP at a weight ratio of 90:5:5 to produce a layer B electrode slurry away from the positive current collector. Among them, the average particle size of activated carbon is 10μm, and the specific surface area is 550m 2 / g.

[0099] Apply the l...

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Abstract

The invention discloses an electrode, a preparation method thereof and a lithium ion capacitor battery. The electrode includes a current collector and an electrode material layer coated on the current collector. The electrode material layer includes a layer A on the current collector and a layer B on the A layer. The porosity of the A layer is higher than that of the B layer. The porosity is low, and the thickness of the A layer is smaller than that of the B layer. The preparation method includes: 1) preparing the A-layer electrode slurry and the B-layer electrode slurry; 2) first coating the A-layer electrode slurry on the current collector, and then coating the B-layer electrode slurry on the A-layer electrode On the slurry, the electrode is obtained. The electrode provided by the invention has dual characteristics of high power and high energy, low internal resistance, and good rate performance.

Description

technical field [0001] The invention belongs to the technical field of energy storage, and relates to a battery element, in particular to an electrode, a preparation method thereof and a lithium ion capacitor battery. Background technique [0002] At present, lithium-ion capacitor batteries on the market are developing in the direction of increasing energy density. On the one hand, a single material can increase the content of active materials by increasing the thickness of the electrode, but the increase in thickness often leads to difficulties in electrolyte penetration, especially It is closer to the current collector, which affects the magnification under high current. On the other hand, the compounding of multiple materials can improve the overall performance to a certain extent by using the synergistic effect between materials, but the compounding of materials often requires strict evaluation from material selection to formula to maximize the compounding The performan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/13H01M4/139H01M10/0525H01M10/0583
CPCH01M4/13H01M4/139H01M10/0525H01M10/0583H01M2004/021Y02E60/10Y02P70/50
Inventor 陈思章庆林周义荣颜亮亮黄廷立龚正大虞嘉菲
Owner SHANGHAI AOWEI TECH DEV