High-temperature resistance lithium ion secondary battery adhesive and preparation method thereof

A lithium-ion battery and secondary battery technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve problems such as high temperature resistance, poor acid resistance, poor salt resistance, and easy precipitation

Active Publication Date: 2013-10-16
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Polyacrylamide polymers are important water treatment and oilfield chemicals, but they have poor shear stability and severe mechanical degradation during pumping; poor salt resistance and easy precipitation; poor high temperature and acid resistance

Method used

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  • High-temperature resistance lithium ion secondary battery adhesive and preparation method thereof
  • High-temperature resistance lithium ion secondary battery adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In the reactor, add 25 parts of 2-acrylamide-2-methylpropanesulfonate lithium, 15 parts of lithium itaconate, 5 parts of maleic anhydride, 1 part of carboxymethylcellulose lithium and 254 parts of distilled water, in The rotating speed is 150 rev / min stirring speed and gradually warming up to 70°C, then adding 0.6 parts of ammonium persulfate initiator to initiate the reaction, the reaction is completed after 1 hour, and the lithium-ion secondary battery positive electrode material with a solid content of 15% is obtained adhesive.

Embodiment 2

[0020] Add 25 parts of lithium 2-acrylamide-2-methylpropanesulfonate, 20 parts of dimethyl itaconate, 5 parts of maleic anhydride, 1 part of lithium carboxymethylcellulose and 254 parts of distilled water into the reactor , gradually warming up to 70°C at a stirring speed of 150 rpm, then adding 0.6 parts of ammonium persulfate initiator to initiate the reaction, and the reaction was completed after 1 hour, and a lithium-ion secondary battery with a solid content of 15% was obtained Cathode material binder.

Embodiment 3

[0022] Add 25 parts of lithium 2-acrylamide-2-methylpropanesulfonate, 20 parts of lithium itaconate, 5 parts of fumaric acid, 2 parts of carboxymethylcellulose lithium and 253 parts of distilled water in the reactor, at a speed of At a stirring speed of 150 rpm, the temperature was gradually raised to 70° C., and then 0.6 parts of ammonium persulfate initiator was added to initiate the reaction. After 1 hour, the reaction was completed, and a lithium-ion secondary battery positive electrode material bonded with a solid content of 15% was obtained. agent.

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Abstract

The invention discloses a high-temperature resistance lithium ion secondary battery adhesive and a preparation method thereof. The preparation method adopts 2-acrylamide-2- methylsulfonate, itaconate, dimethyl itaconate, maleic anhydride, and fumarate as the initial monomer, and carboxymethyl cellulose salt as the auxiliary agent. The reactants polymerize under the inducing of persulfate thermal free radical initiator, so as to produce homogeneous and stable electrode adhesive. The electrode adhesive prepared according to the preparation method has the advantage of high-temperature resistance, and is suitable for being applied to high power-density and high energy-density lithium ion battery.

Description

technical field [0001] The invention relates to a high temperature resistant lithium ion secondary battery adhesive and a preparation method. Background technique [0002] Lithium-ion secondary batteries have achieved great development in the past two decades due to their advantages such as high specific capacity, high voltage, small size, light weight, and no memory. The battery is mainly composed of positive electrode, negative electrode, diaphragm and organic electrolyte; the positive and negative electrodes are generally composed of powdery electroactive materials, such as lithium metal oxide, carbon negative electrode material, binder, conductive agent and current collector. The method is to mix and grind the active material, conductive agent, binder solution, etc. uniformly to form a uniform slurry, coat it on a collector electrode such as copper foil or aluminum foil, and prepare it by drying and rolling. Adhesives such as ethylene-propylene rubber, fluorine-containi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/58C08F222/02C08F222/06C08F222/14H01M4/62H01M10/0525
CPCY02E60/122Y02E60/10
Inventor 崔光磊刘志宏段玉龙孔庆山姚建华
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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