Novel green and environment-friendly adhesive of lithium ion battery

A technology of lithium-ion batteries and binders, which is applied in the manufacture of battery electrodes, secondary batteries, and electrolyte batteries, etc. It can solve the problems of different components, reduce the compatibility of electrode materials and SEI films, achieve high cost performance, and improve cycle stability. The effect of the property and the simple preparation method

Active Publication Date: 2018-03-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these binders are different from the composition of the electrolyte (mainly carbonate), reducing the compatibility with electrode materials and SEI films

Method used

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  • Novel green and environment-friendly adhesive of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Measure 1.83g of NMP into the weighing bottle, weigh 0.0366g of polytrimethylene carbonate into the weighing bottle, stir to dissolve. Weigh 0.061 g of silicon nanoparticles and 0.0244 g of acetylene black, grind them evenly, add them into a weighing bottle, stir for 24 hours, and disperse evenly. Press the Cu foil into a disc with a diameter of 1.4 cm, weigh it, and record it as weight 1. Spread the adjusted slurry evenly on the treated Cu foil, dry it in vacuum at 80°C for 12h, weigh it, and record it as weight 2. Subtract weight 1 from weight 2 to obtain the weight of the coating, recorded as weight 3. Move the dried pole piece into the glove box, and assemble the 2016 button cell with the lithium piece as the counter electrode. Use 1M (mol / L) (the volume ratio of conductive salt is 1:1) EC / DEC mixed solution as the electrolyte. Seal the assembled battery and let it stand for 10 hours. Test the electrochemical performance of the static battery on a charge-dischar...

Embodiment 2

[0030] Measure 2.44g of NMP into the weighing bottle, weigh 0.0488g of polytrimethylene carbonate into the weighing bottle, and stir to dissolve. Weigh 0.061 g of silicon nanoparticles and 0.0122 g of acetylene black, grind them evenly, add them into a weighing bottle, stir for 24 hours, and disperse evenly. Press the Cu foil into a disc with a diameter of 1.4 cm, weigh it, and record it as weight 1. Spread the adjusted slurry evenly on the treated Cu foil, dry it in vacuum at 80°C for 12h, weigh it, and record it as weight 2. Subtract weight 1 from weight 2 to obtain the weight of the coating, recorded as weight 3. Move the dried pole piece into the glove box, and assemble the 2016 button cell with the lithium piece as the counter electrode. Use 1M (the volume ratio of conductive salt is 1:1) EC / DEC mixed solution as the electrolyte. Seal the assembled battery and let it stand for 10 hours. Test the electrochemical performance of the static battery on a charge-discharge t...

Embodiment 3

[0032] Measure 1.22g of NMP into the weighing bottle, weigh 0.0244g of polytrimethylene carbonate into the weighing bottle, stir to dissolve. Weigh 0.061 g of silicon nanoparticles and 0.0366 g of acetylene black, grind them evenly, add them into a weighing bottle, stir for 24 hours, and disperse evenly. Press the Cu foil into a disc with a diameter of 1.4 cm, weigh it, and record it as weight 1. Spread the adjusted slurry evenly on the treated Cu foil, dry it in vacuum at 80°C for 12h, weigh it, and record it as weight 2. Subtract weight 1 from weight 2 to obtain the weight of the coating, recorded as weight 3. Move the dried pole piece into the glove box, and assemble the 2016 button cell with the lithium piece as the counter electrode. Use 1M (the volume ratio of conductive salt is 1:1) EC / DEC mixed solution as the electrolyte. Seal the assembled battery and let it stand for 10 hours. Test the electrochemical performance of the static battery on a charge-discharge teste...

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PUM

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Abstract

The invention provides an adhesive of a lithium ion electrode material, and discloses a polycarbonate adhesive, an electrode plate prepared by the adhesive and an electrochemical device. Compared withthe adhesive (such as PVDF (polyvinylidene fluoride)) in the prior art, the adhesive has the advantages that the property is strong, the electrochemical stability is good, the green and environment-friendly effects are realized, and the toxicity is low; the adhesive is especially suitable for a lithium ion battery using silicon as a negative electrode, the capacity of the lithium ion battery is obviously increased, the cyclic stability of the battery is improved, and the coulombic efficiency of the battery is improved; the adhesive of the electrode material has higher performance-price ratioand better market potential; the steps are simple, the operation is convenient, and the practicality is strong.

Description

technical field [0001] The invention belongs to the field of lithium-ion batteries, in particular to a novel green and environment-friendly binder for lithium-ion batteries. Background technique [0002] At present, lithium-ion batteries are the preferred power system for power and digital products. In lithium-ion batteries, the binder is a polymer material that binds active materials and conductive additives to the current collector to form an electronic conduction path and ensure the normal operation of the battery. During the charge and discharge process, the binder effectively maintains the integrity of the electrode structure, ensuring that the electrode material can repeatedly insert and remove lithium. Therefore, the binder is a crucial factor for the normal operation of lithium-ion batteries. The binders currently used for lithium-ion battery electrode materials mainly include: hydroxymethyl cellulose (CMC), polyacrylic acid (PAA), polyvinylidene fluoride (PVDF), a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M10/0525H01M10/058
CPCH01M4/622H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 冯金奎费慧芳
Owner SHANDONG UNIV
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