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Graphene organic functional modification methods and application

A graphene and functionalization technology, applied in electrochemical generators, electrical components, circuits, etc., can solve problems such as poor compatibility between organic groups and metal lithium, low conductivity of polymer electrolytes, and impact on use value. Achieve high electrical conductivity, good mechanical properties, and long cycle life

Inactive Publication Date: 2015-10-07
内蒙古源创绿能节能环保产业创业投资合伙企业(有限合伙)
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is that the existing polymer electrolyte has low conductivity, insufficient mechanical strength, poor compatibility between organic groups and metal lithium, and the use value is affected, thereby proposing a high conductivity, high Capacitance, functional modification method and application of new polymer electrolyte components with wider application range

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  • Graphene organic functional modification methods and application
  • Graphene organic functional modification methods and application

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Embodiment 1

[0023] The present embodiment provides a kind of modified graphene, and it is prepared by following steps:

[0024] S1. Using the classic Hummers method, in a 500ml four-necked flask with stirring and a thermometer, mix 10g of graphite powder and 4g of anhydrous sodium nitrate and add 100ml of concentrated H 2 SO 4 , and stirred for 0.5h under ice bath conditions, under strong stirring, adding 10gKMnO 4 , react at 0°C for 4h, and use 3% volume concentration of H 2 o 2 Reduction of excess KMnO 4 and some KMnO 4 The reduced MnO 2 , so that the two become colorless and soluble MnSO 4 , and finally obtain a bright yellow suspension, which is filtered, washed and vacuum dehydrated to obtain graphene oxide;

[0025] S2, adding 10 g of the graphene oxide to 200 g of NMP, ultrasonic treatment for 2 h, adding 1 g of ethylenediamine to the NMP solution of graphene oxide, and stirring and reacting at 80° C. for 4 h to obtain functionalized graphene oxide;

[0026] S3, add 10g N i...

Embodiment 2

[0030] S1. Using the classic Hummers method, in a 500ml four-neck flask with stirring and a thermometer, mix 15g of graphite powder and 8g of anhydrous sodium nitrate and add 150ml of concentrated HNO 3 , and stirred for 1 h under ice bath conditions, under vigorous stirring, added 12g KMnO 4 , react at 2°C for 5h, and use 4% volume concentration of H 2 o 2 Reduction of excess KMnO 4 and some KMnO 4 The reduced MnO 2 , so that the two become colorless and soluble MnSO 4 , to finally obtain a bright yellow suspension, which is filtered, washed and vacuum dehydrated to obtain graphene oxide;

[0031] S2. Add 13 g of the graphene oxide to 300 g of NMP, ultrasonically treat it for 2.5 h, add 1 g of hexamethylenediamine and 1 g of dicyclohexylcarbodiimide to the NMP solution of graphene oxide, and stir the reaction at 85° C. 4.5h, obtain functionalized graphene oxide;

[0032] S3, and then into the reducing agent H 2 , the temperature was raised to 95° C., the reduction rea...

Embodiment 3

[0036] S1. Using the classic Hunmers method, in a 500ml four-neck flask with stirring and a thermometer, mix 20g of graphite powder and 10g of anhydrous sodium nitrate into 250ml of concentrated HCl, and stir for 2 hours under ice bath conditions, then vigorously stir Next, add 15gKMnO 4 , react at 2°C for 5h, and use 5% volume concentration of H 2 o 2 Reduction of excess KMnO 4 and some KMnO 4 The reduced MnO 2 , making it into colorless and soluble MnSO 4 , and finally obtain a bright yellow suspension, which is filtered, washed and vacuum dehydrated to obtain graphene oxide;

[0037] S2, adding 13g of the graphene oxide to 300g of NMP, ultrasonic treatment for 2.5h, adding 2g of butanediamine and 2g of hexamethylenediamine to the NMP solution of graphene oxide, and stirring and reacting at 85°C for 4.5h to obtain Functionalized graphene oxide;

[0038] S3, adding 15g NaBH to the functionalized graphene oxide 4 , the temperature was raised to 95° C., the reduction reac...

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Abstract

The present invention discloses a graphene organic functional modification method and application, the method comprises the following steps: S1, using a strong oxidizing agent for oxidizing graphite powder, then by ultrasonically treating to obtain graphene oxide; S2, performing covalent bond functionalization treatment on the graphene oxide; and S3, performing different degrees of reduction processing on the functionally treated graphene oxide to obtain different types of organically modified graphene. By use of high conductivity and stability of the structure of the graphene, graphene-based full-solid-state and gel state polymer electrolytes can be obtained, graphene-polymer lithium-ion batteries can be obtained, the graphene-polymer lithium-ion batteries can be widely applied in mobile phones, computers and other electronic products, automobiles, electric bicycles and other vehicles, and also can be used in aerospace fields and the like which requires high energy density, long cycle life and small volume.

Description

technical field [0001] The invention belongs to the field of polymer lithium-ion batteries, and in particular relates to a method for obtaining the organic functional modification of graphene and its application in polymer electrolytes. Background technique [0002] Lithium metal is the lightest of all metals, has the lowest oxidation-reduction potential, and has the largest mass energy density. Since the 1960s, lithium batteries have gradually become one of the alternative energy sources for petroleum. With the development of society, the requirements for environmental protection, low carbon and green energy are getting higher and higher. Lithium-ion batteries have developed rapidly in just a few decades and have gone through different stages of development. Developed to secondary rechargeable lithium secondary batteries, and then further developed into polymer lithium-ion batteries; polymer lithium-ion batteries not only have the characteristics of lithium-ion batteries, b...

Claims

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Application Information

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IPC IPC(8): C01B31/04H01M10/0565
CPCY02E60/10
Inventor 许家琳杨仕明许贻东
Owner 内蒙古源创绿能节能环保产业创业投资合伙企业(有限合伙)
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