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A kind of preparation method of pure organic polymer lithium ion battery electrode material

A technology for lithium ion batteries and electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor low temperature performance, high price, poor high temperature cycle stability, etc., and achieves low requirements for synthesis equipment, low price, and structure. novel effect

Active Publication Date: 2020-06-16
QUJING NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the energy density of lithium-ion batteries has not been able to meet people's needs. The reason is that the commonly used electrode materials have corresponding deficiencies and shortcomings.
Such as the earliest commercial application of LiCoO 2 The energy density and cycle performance of the layered structure type and its derivatives are not high enough, and the price of Co is high and toxic, which cannot meet the development concept of green environmental protection
Polyanionic LiFePO 4 and their derivatives have high cycle stability and safety, but low energy density and poor low temperature performance
Spinel LiMn 2 o 4 Cathode materials and their derivatives have low theoretical specific capacity and poor high-temperature cycle stability
[0003] Lithium-ion battery negative electrode materials are also developing rapidly, and graphite, silicon, oxide, graphene, Li 4 Ti 5 o 12 and many other negative electrode materials, but the most mature commercial negative electrode material is still graphite, and other materials still have many shortcomings that need to be solved urgently

Method used

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  • A kind of preparation method of pure organic polymer lithium ion battery electrode material
  • A kind of preparation method of pure organic polymer lithium ion battery electrode material
  • A kind of preparation method of pure organic polymer lithium ion battery electrode material

Examples

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Embodiment 1

[0031] Example 1: Weigh 0.723 g (2.5 mmol) of 4,4',4''-triaminotriphenylmethane and dissolve it in 20 ml of acetic acid, then slowly add it dropwise to 30 ml of 1,4,5,8- A DMF solution of naphthalenetetracarboxylic anhydride (1.00 g, 3.75 mmol) was stirred at 160° C. for 24 hours, and then filtered to obtain a yellow solid. The solid was extracted with tetrahydrofuran, methanol, and acetone for 12 hours, and then vacuum-dried for 12 hours to obtain the final product with a yield of about 65%. Pass the dried P-NDI through a 300-mesh sieve. P-NDI, PVDF, and Super-P were configured into a mixture according to the mass ratio of 50:15:35, and PNM was added as a solvent, and stirred for 2 hours to prepare a lithium-ion battery electrode slurry. The electrode viscous slurry was coated on a 12 μm copper foil with a coating thickness of 50 μm, and dried at 100° C. for 12 hours to obtain a lithium ion battery electrode. The obtained battery electrode is cut into circular pole pieces w...

Embodiment 2

[0033]Example 2: Weigh 1.0845g (3.5mmol) of 4,4',4''-triaminotriphenylmethane and dissolve it in 40ml of acetic acid, then slowly add it dropwise to 50ml of 1,4,5,8- A DMF solution of naphthalenetetracarboxylic anhydride (2.00 g, 7.5 mmol) was stirred at 160° C. for 24 hours, and then filtered to obtain a yellow solid. The solid was extracted with tetrahydrofuran, methanol, and acetone for 12 hours, and then vacuum-dried for 12 hours to obtain the final product with a yield of about 66%. Pass the dried P-NDI through a 300-mesh sieve. P-NDI, PVDF, and Super-P were configured into a mixture according to the mass ratio of 60:10:30, and PNM was added as a solvent, and stirred for 2 hours to prepare a lithium-ion battery electrode slurry. The electrode viscous slurry was coated on a 12 μm copper foil with a coating thickness of 50 μm, and dried at 100° C. for 12 hours to obtain a lithium ion battery electrode. The obtained battery electrode is cut into circular pole pieces with a...

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Abstract

The invention discloses a method for preparing pure organic polymer lithium ion battery electrode materials. The method includes dissolving 4, 4', 4''-triaminotriphenyl methane in at least 20 ml of acetic acid to obtain mixtures, and then slowly dropwise adding the mixtures into 30 ml of DMF (dimethyl formamide) solution with dissolved 1, 4, 5, 8-naphthalene tetramethyl anhydride; stirring and filtering solution obtained at the step 1 at the temperatures not lower than 160 DEG C to obtain P-NDI (naphthalene diisocyanate) crystals; carrying out Soxhlet extraction and vacuum drying on crystal substances obtained at the step 2 by the aid of tetrahydrofuran, methanol and acetone to obtain pure organic polymers; preparing mixtures from the pure organic polymers obtained at the step 3, polyvinylidene fluoride and conductive carbon black Super-P according to mass ratios and adding the mixtures into N-methyl pyrrolidone to obtain slurry; coating the slurry obtained at the step 4 on copper foils not thicker than 60 micrometers, drying the copper foils to obtain lithium ion battery negative electrode pole pieces, cutting the lithium ion battery negative electrode pole pieces to obtain circular pole pieces and utilizing metallic lithium sheets as counter electrodes; assembling the circular pole pieces and the counter electrodes in glove boxes to obtain 2032 type button batteries. The N-methyl pyrrolidone is used as a solvent.

Description

technical field [0001] The invention belongs to a preparation method of a pure organic polymer lithium ion battery electrode material. Background technique [0002] With the continuous development of new energy and new energy technologies, lithium-ion batteries have received more and more attention. In the past two decades, lithium-ion batteries have developed rapidly and have been widely used in small electronic devices, mobile communications, electric vehicles, energy storage and other fields. However, the energy density of lithium-ion batteries has not been able to meet people's needs. The reason is that the commonly used electrode materials have corresponding deficiencies and shortcomings. Such as the earliest commercial application of LiCoO 2 The energy density and cycle performance of the layered structure type and its derivatives are not high enough, and the price of Co is high and toxic, which cannot meet the development concept of green environmental protection. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/60H01M10/0525
CPCY02E60/10
Inventor 刘建军夏书标李付绍成飞翔刘腾
Owner QUJING NORMAL UNIV