Porous nitrogen-doped carbon/Fe2O3/graphene foamed flexible composite material and preparation method and application thereof

A nitrogen-doped carbon, composite material technology, applied in electrical components, electrochemical generators, battery electrodes, etc., can solve the problems of unguaranteed safety performance, low electronic conductivity, poor rate performance, etc. Effects of energy density and power density, high electrical conductivity, high specific capacity
CN108199014AActive Publication Date: 2018-06-22YINLONG ENERGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
YINLONG ENERGY CO LTD
Publication Date
2018-06-22

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Abstract

The invention provides a porous nitrogen-doped carbon / Fe2O3 / graphene foamed flexible composite material and preparation method and application thereof. In the flexible composite material, Fe2O3 nanoparticle is coated with graphene, and nitrogen-doped carbon has a porous foam structure. The method comprises the steps of preparing pure melamine foam, performing calcination in nitrogen to obtain a nitrogen-doped carbon foam matrix, preparing to obtain a spinning solution after that nanometer Fe2O3, a graphene oxide solution and polyvinylpyrrolidone are mixed, taking the nitrogen-doped carbon foammatrix as a receiving device, directly spinning the spinning solution on carbon foam by a high-pressure electrostatic spinning technology to obtain a porous nitrogen-doped carbon / Fe2O3 / graphene oxide / PVP composite material, and obtaining the flexible composite material after high-temperature carbonization and cooling. The material is used for a negative electrode material of a lithium ion batteryand has the characteristics of favorable flexibility, high conductivity, high specific capacity and the like.
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Description

technical field

[0001] The invention relates to the field of new energy materials, in particular to a porous nitrogen-doped carbon / Fe 2 o 3 / Graphene foam flexible composite material and its preparation method and application. Background technique

[0002] In recent years, the demand for bendable and foldable flexible electronic devices has increased year by year, and flexible lithium-ion batteries are the core components of flexible electronic devices. Traditional lithium-ion batteries are mainly formed by coating active materials, conductive agents, and binders on metal current collectors, and drying and rolling. The electrode materials do not have flexibility, and the presence of current collectors greatly reduces the overall performance of the material energy density. Therefore, there is a need to develop self-supporting flexible electrode materials without binders, conductive agents, and current collectors to meet the needs of flexible electronics.

[0003] At pres...

Claims

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