Shenzhen University

Shenzhen Eigen-equation Graphene Technology Co., Ltd.

Dayong Gui

Jianhong Liu

Qianling Zhang

Chuanxin He

Caizhen Zhu

Hongzhen Zhang

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

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Shenzhen, China

Dayong Gui