Graphene-surface-grafted free radical polymer composite material, and preparation method and use thereof
A graphene surface, composite material technology, applied in electrical components, electrochemical generators, circuits, etc., can solve the problems of limited performance improvement of secondary batteries, unsuitable for mass production, difficult to control graft content, etc. The preparation method is simple and easy, excellent dispersibility, and high repeatability.
Active Publication Date: 2019-06-14
SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI
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Abstract
The invention discloses a graphene-surface-grafted free radical polymer composite material, and a preparation method and a use thereof. The preparation method comprises the following steps: 1) uniformly dispersing graphene in a solvent, uniformly mixing the obtained solution with 2,2,6,6-tetramethyl-4-piperidinyl methacrylate monomer, deoxidizing the obtained solution, uniformly mixing the solution with an initiator, carrying out a reaction for 1-72 h, and carrying out filtration and separation to obtain an intermediate, wherein a mass ratio of the graphene to the monomer to the initiator is 1:(11.25-90):(0.08-0.64), and the graphene is graphene oxide and/or reduced graphene oxide; and 2) uniformly mixing the intermediate, disodium edetate, sodium tungstate and hydrogen peroxide in a solvent, stirring and reacting the obtained mixture, and carrying out filtration and separation to obtain the composite material. The method is simplified, is suitable for mass production, and allows the grafting content of covalent bonds on surface of a graphene sheet to be easily controlled; and when the composite material is applied to cathodes of lithium ion batteries, the obtained secondary batteries have high performances.
Application Domain
Cell electrodesSecondary cells
Technology Topic
Cvd grapheneSolvent +13
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PUM
Property | Measurement | Unit |
The average thickness | 1.0 | nm |
The average thickness | 9.0 | nm |
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