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Polyoxynitride radical derivative containing polypyrrole skeleton, its application and lithium ion battery made therefrom

A lithium-ion battery, nitroxide free radical technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of reducing the specific capacity and specific energy of the battery, reduce the proportion, improve the electron transmission performance, and significantly reduce the charge and discharge voltage. The effect of the platform

Active Publication Date: 2017-06-23
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This further reduces the actual specific capacity and specific energy of the battery

Method used

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  • Polyoxynitride radical derivative containing polypyrrole skeleton, its application and lithium ion battery made therefrom
  • Polyoxynitride radical derivative containing polypyrrole skeleton, its application and lithium ion battery made therefrom
  • Polyoxynitride radical derivative containing polypyrrole skeleton, its application and lithium ion battery made therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: PPy-B-TEMPO

[0036] Synthesis of N-substituted pyrrolic acid: A mixed solvent of acetic acid (16 mL) / water (24 mL) was added to a pre-dried 250 mL three-necked flask. Then 2,5-dimethoxytetrahydrofuran (5.28g) and 4-aminobutyric acid (4.12g) were added, and stirred until completely dissolved, then the temperature of the reaction solution was increased by 70°C, and the reaction was continuously stirred for 1h. At the end of the reaction, extract the reaction mixture with dichloromethane to obtain the oil phase extract and dry it with anhydrous magnesium sulfate powder, then remove the solvent with a rotary evaporator, and the remaining product is separated and purified by column chromatography. The stationary phase is selected from 300 mesh silica gel. The phase was eluted with n-hexane / ethyl acetate gradient. Finally, 4.34 g of N-substituted pyrrolebutyric acid was obtained, with a yield of 71.1%, and the product was a white liquid.

[0037] Synthesis of Py...

Embodiment 2

[0039] Example 2: PPy-C-TEMPO

[0040] Synthesis of N-substituted pyrrole caproic acid: A mixed solvent of acetic acid (16 mL) / water (24 mL) was added to a pre-dried 250 mL three-necked flask. Then 2,5-dimethoxytetrahydrofuran (5.28g) and 4-aminocaproic acid (5.24g) were added, and stirred until completely dissolved, then the temperature of the reaction solution was increased by 70°C, and the reaction was continuously stirred for 1h. At the end of the reaction, extract the reaction mixture with dichloromethane to obtain the oil phase extract and dry it with anhydrous magnesium sulfate powder, then remove the solvent with a rotary evaporator, and the remaining product is separated and purified by column chromatography. The stationary phase is selected from 300 mesh silica gel. The phase was eluted with n-hexane / ethyl acetate gradient. Finally, 6.02 g of N-substituted pyrrole hexanoic acid was obtained, with a yield of 83.1%, and the product was a white liquid.

[0041] Synthe...

Embodiment 3

[0044] Respectively with the PPy-C-TEMPO polymer that embodiment 2 makes as the active material of cathode material, prepare lithium-ion battery according to the following steps:

[0045] a) Weigh 1 part of binder powder and disperse it in 10 parts of N-methylpyrrolidone solvent, seal and stir, and slightly heat to obtain a bonding slurry.

[0046] b) Weigh 4 parts of acetylene black and 5 parts of prepared polymer powder and mix them evenly.

[0047] c) Pour the mixture in b) into the bonding slurry in a), then add appropriate N-methylpyrrolidone, stir and mix evenly to obtain a mixed slurry with moderate viscosity.

[0048] d) The slurry in c) is evenly coated on the aluminum foil, and then vacuum-dried in an oven at 60° C. for 24 hours to obtain a positive electrode sheet.

[0049] e) With the positive electrode sheet prepared in d) as the positive electrode, the metal lithium sheet as the negative electrode, 1mol / L LiPF 6 EC / DMC (V / V, 1:1) was used as the electrolyte, an...

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Abstract

The invention discloses a polypyrrole skeleton-containing oxygen-nitrogen concentrating free radical derivative. The structure of the polypyrrole skeleton-containing oxygen-nitrogen concentrating free radical derivative is as shown in a formula (I), wherein in the formula (l), m is equal to 1 or 2. The invention aslo discloses an application of the oxygen-nitrogen concentrating free radical derivative serving as an anode material of a lithium ion battery. In addition, the invention also discloses a lithium ion battery prepared from the oxygen-nitrogen concentrating free radical derivative serving as the anode material. The battery has excellent cycling stability, a remarkable charge-discharge voltage platform and relatively high charge-discharge specific capacity.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a polyoxynitride free radical derivative containing a polypyrrole skeleton and its application as a positive electrode material of a lithium ion battery, and a lithium ion battery prepared therefrom. Background technique [0002] With the further development of human society, the energy problems, resource problems and environmental problems facing the world are becoming more and more serious. Since the current energy structure is basically based on petrochemical fuels (petroleum, coal, natural gas), this not only causes resource depletion but also pollutes the environment. Electric energy will play an increasingly important role in the future due to its cleanliness, safety and convenience. Therefore, in the future, lithium-ion batteries with good mobility and convenient power storage and power supply will play a pivotal role in a society based on electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G61/12H01M4/60
CPCY02E60/10
Inventor 苏畅杨芳张诚徐立环纪律律
Owner ZHEJIANG UNIV OF TECH
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