Chinese Academy of Sciences

Sabic Global Technologies B.v.

Ningbo Morsh Technology Co., Ltd.

Ningbo Energy Material Technology Co., Ltd

Xufeng Zhou

Zhaoping Liu

Changlin Tang

Ihab N Odeh

Yongsheng Zhao

Yunyang Liu

Huasheng Hu

Zhihong Qing

Zhihong Qin

Jingbo Ma

Shiyun Ding

Jiangang Zhang

A thermally conductive three-dimensional (3-D) graphene-polymer composite material, methods of making, and uses thereof are described. The thermally conductive three-dimensional (3-D) graphene-polymer composite material contains: (a) a porous 3-D graphene structure comprising a network of graphene layers that are attached to one another through a carbonized organic polymer bridging agent; and (b) a polymer material impregnated within the porous 3-D graphene structure, wherein the thermally conductive 3-D graphene-polymer composite material has a thermal conductivity of 10 W/m&#xb7;K to 16 W/m&#xb7;K.

Thermally conductive three-dimensional (3-D) graphene polymer composite materials, methods of making, and uses thereof

The present invention provides a graphene composite powder form material that is suitable for industrialized application. The graphene composite powder form material is composited by graphene materials and a high-molecular compound. The high-molecular compound is uniformly coated on surfaces of the graphene material. Any adjacent graphene materials are separated by the high-molecular compound. An apparent density of the graphene composite powder form material is larger than or equal to 0.02 g/cm. Under an external pressure, the graphene materials in the graphene composite powder form material do not re-stack, and can be easily restored to original form, which benefit the storage and transportation. Besides, the graphene composite powder form material has a good compatibility in other material systems, which greatly broadens the application fields in the downstream products and successfully solves the problem in industrial application. The present invention also provides a method for making the graphene composite powder form material.

Graphene composite powder form material and method for making the same

The present invention provides a graphene coating-modified electrode plate for lithium secondary battery, characterized in that, the electrode plate comprises a current collector foil, graphene layers coated on both surfaces of the current collector foil, and electrode active material layers coated on the graphene layers. A graphene coating-modified electrode plate for lithium secondary battery according to the present invention comprises a current collector foil, graphene layers coated on both surfaces of the current collector foil, and electrode active material layers coated on the graphene layers. The graphene-modified electrode plate for lithium secondary battery thus obtained increases the electrical conductivity and dissipation functions of the electrode plate due to the better electrical conductivity and thermal conductivity of graphene. The present invention further provides a method for producing a graphene coating-modified electrode plate for lithium secondary battery.

Graphene coating modified electrode plate for lithium secondary battery and method for producing the same

The present invention provides a method for preparing graphene, including reacting graphite in an acid solution in which an oxidant is present so as to obtain a graphene. Compared with the prior art, the advantages of the present invention reside in that, the graphene prepared by the method of the present invention has excellent quality and substantially increased yield and production rate, as compared with mechanical stripping, epitaxial growth, and chemical vapor deposition; and the graphene prepared by the method of the present invention has significantly improved quality, substantially reduced structural defects, and significantly increased conductivity, as compared with oxidation-reduction preparation in the solution-phase; besides, the method is also advantageous for a simple process, mild conditions, low cost, and very easy for scale production. The graphene prepared by the present invention has very broad prospects in the fields of lithium-ion batteries, supercapacitors, functional composite materials, transparent conductive films, and microelectronic devices, etc.

Method for preparing graphene

Growing community of inventors

Ningbo, China

Xufeng Zhou