Shenzhen Eigen-equation Graphene Technology Co., Ltd.

Other

Shenzhen University

Jianhong Liu

Qianling Zhang

Chuanxin He

Jian Xu

Chuhong Liao

Xiaoming Li

Dayong Gui

Caizhen Zhu

Xiangning Ren

Chao Hu

Hongzhen Zhang

Shuangquan Wu

A method of preparing graphene-coated alumina, the method including: (1) preparing a liquid polyacrylonitrile (LPAN) solution, stirring the LPAN solution at between 100 and 200&#xb0; C. to yield a cyclized polyacrylonitrile solution; (2) heating the cyclized LPAN solution at between 200 and 300&#xb0; C. to yield a thermally-oxidized polyacrylonitrile (OPAN) having a ladder structure; (3) mixing the thermally-oxidized polyacrylonitrile with an aluminum compound, to yield a mixture, and adding a solvent to the mixture, uniformly mixing, to yield a polyacrylonitrile-coated aluminum compound; (4) drying the polyacrylonitrile-coated aluminum compound until the solvent is evaporated, to yield a carbonized precursor-coated aluminum compound; and (5) calcining the carbonized precursor-coated aluminum compound in the presence of an inert gas flow, to yield graphene-coated alumina.

Method of preparing graphene-coated alumina and graphene-coated alumina prepared using the method

A method of preparing a copper-based composite conductive powder. The method includes: (1) preparing a liquid polyacrylonitrile (LPAN) solution, stirring the LPAN solution to yield a cyclized polyacrylonitrile solution; (2) heating the cyclized LPAN solution at between 200 and 300&#xb0; C. for between 1 and 10 hrs to yield a thermally-oxidized polyacrylonitrile having a ladder structure; (3) adding the thermally-oxidized polyacrylonitrile and a copper compound to a solvent, and uniformly mixing, to yield a polyacrylonitrile coated copper compound; (4) drying the polyacrylonitrile coated copper compound to yield a carbonized precursor coated copper compound; and (5) calcining the carbonized precursor coated copper compound in the presence of an inert gas flow of between 10 and 500 mL/min for between 6 and 24 hrs at the temperature of between 300 and 1800&#xb0; C.

Method of preparing copper-based composite conductive powder

A method of preparing a graphene material. The method includes: (1) preparing a liquid polyacrylonitrile (LPAN) solution, stirring the LPAN solution to yield a cyclized polyacrylonitrile solution; (2) stirring the cyclized LPAN solution at between 200 and 300&#xb0; C. to yield a thermally-oxidized polyacrylonitrile; (3) grinding and sieving the thermally-oxidized polyacrylonitrile, and drying a resulting product at room temperature, to yield a thermally-oxidized precursor; (4) calcining the thermally-oxidized precursor in the presence of an inert gas flow of between 10 and 500 mL/min for between 1 and 24 hrs at the temperature of between 400 and 1000&#xb0; C., to yield a carbonized precursor; and (5) calcining the carbonized precursor in the presence of an inert gas flow of between 10 and 500 mL/min for between 1 and 10 hrs at the temperature of between 1000 and 3000&#xb0; C., to yield a graphene material.

Graphene material and method of preparing the same

A method of preparing carbon-coated manganous oxide, the method including: (1) preparing a liquid polyacrylonitrile (LPAN) solution as a carbon source, stirring the LPAN solution at between 100 and 200&#xb0; C. to yield a cyclized polyacrylonitrile solution; (2) heating the cyclized LPAN solution at between 200 and 300&#xb0; C. to yield a thermally-oxidized polyacrylonitrile (OPAN) having a ladder structure; (3) mixing the thermally-oxidized polyacrylonitrile with a manganese compound, to yield a mixture, and adding a solvent to the mixture, uniformly mixing, to yield a polyacrylonitrile coated manganese compound; (4) drying the polyacrylonitrile coated manganese compound until the solvent is evaporated completely and the polyacrylonitrile coated on the manganese compound is crosslinked to form a solid, to yield a carbonized precursor coated manganese compound; and (5) calcining the carbonized precursor coated manganese compound in the presence of an inert gas flow, to yield a carbon-coated manganous oxide.

Method of preparing carbon-coated manganous oxide and carbon-coated manganous oxide prepared using the method

A method of preparing carbon-coated cuprous oxide, including: (1) preparing a liquid polyacrylonitrile (LPAN) solution, stirring the LPAN solution to yield a cyclized polyacrylonitrile solution; (2) heating the cyclized LPAN solution to yield a thermally-oxidized polyacrylonitrile (OPAN); (3) mixing the thermally-oxidized polyacrylonitrile with a copper compound to yield a mixture, and adding to the mixture a hydrophilic solvent or a hydrophobic solvent, thus yielding a polyacrylonitrile coated copper compound; (4) drying the polyacrylonitrile coated copper compound in an oven until the solvent is evaporated completely and the polyacrylonitrile coated on the copper compound is crosslinked to form a solid, where yielding a carbonized precursor coated copper compound; and (5) calcining the carbonized precursor coated copper compound in the presence of an inert gas flow of between 10 and 500 mL/min.

Method of preparing carbon-coated cuprous oxide

A method for modifying a positive electrode material for a lithium-ion battery. The method includes: a) grinding a mixture of manganese dioxide and lithium carbonate, and calcining the mixture at no less than a temperature of 600&#xb0; C. for no less than 20 hrs in the presence of air, to yield a powdery lithium manganese oxide (LiMnO); b) adding a precursor for forming a graphene-like structure to the powdery LiMnO, mixing, curing at a constant temperature of no less than 180&#xb0; C. for between 2 and 4 hrs, grinding, and calcining at no less than a temperature of 500&#xb0; C. for between 1 and 50 hrs in the presence of an inert gas, to yield a composite powder comprising a graphene-like structure and LiMnO; and c) collecting and sintering the composite powder at a temperature of between 300 and 500&#xb0; C. for between 1 and 10 hrs in the presence of air.

Positive electrode materials for lithium-ion batteries and method for preparing the same

A method for modifying a positive electrode material for a lithium-ion battery. The method includes: a) stirring a liquid polyacrylonitrile (LPAN) solution at the temperature of between 80 and 300&#xb0; C. for between 8 and 72 h to yield a cyclized LPAN solution; b) adding positive electrode material for a lithium-ion battery, in a powder form, to the cyclized LPAN solution, and evenly mixing a resulting mixture; c) grinding the mixture, and drying the mixture at room temperature; and d) calcining the mixture at the temperature of between 500 and 1800&#xb0; C. for between 6 and 24 h in the presence of an inert gas to form a graphene-like structure by the cyclized LPAN. The graphene-like structure is evenly distributed in the positive electrode material of the lithium-ion battery to yield a graphene-like structure modified positive electrode material of the lithium-ion battery.

Method for modifying positive electrode materials for lithium-ion batteries

A method for preparing a carbon nanotube, including: a) preparing an LPAN solution, stirring the LPAN solution at between 100 and 200&#xb0; C. for between 100 and 200 hours to yield a cyclized LPAN solution; b) heating the cyclized LPAN solution at between 200 and 300&#xb0; C. for between 1 and 10 hours to yield an OPAN; c) grinding, screening, and drying at room temperature the OPAN to yield a thermal oxidative precursor; d) calcining the thermal oxidative precursor at between 400 and 1000&#xb0; C. for between 1 and 24 h in the presence of inert gas having a flow rate of between 10 and 500 mL/min to yield a carbonated precursor; and e) calcining the carbonated precursor at between 1000 and 1500&#xb0; C. for between 1 and 10 hours in the presence of the inert gas having a flow rate of between 10 and 500 mL/min to yield a carbon nanotube material.

Method for preparing carbon nanotube or carbon microtube

The present invention relates to a method of treating diseases with shock air, including treating hypertension, cholecystitis, and other diseases by directing shock air to specific positions of human body at a frequency of up to and beyond about 3,000 times per minute.

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Shenzhen, China

Jianhong Liu