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Method for preparing nucleocapsid structure lithium ion battery alloy composite cathode material

A lithium-ion battery and negative electrode material technology, applied in the field of material science, can solve the problems of pollution and waste, difficulty in recycling surfactants, and low yield, and achieve the effects of simple process, excellent electrochemical performance, and low technical cost

Inactive Publication Date: 2009-07-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the yield of this method is low, it is difficult to realize large-scale production, and the surfactant is difficult to recover after the reaction is completed, which is easy to cause pollution and waste

Method used

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  • Method for preparing nucleocapsid structure lithium ion battery alloy composite cathode material
  • Method for preparing nucleocapsid structure lithium ion battery alloy composite cathode material
  • Method for preparing nucleocapsid structure lithium ion battery alloy composite cathode material

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Weigh CuO and SnO according to the ratio of Cu:Sn molar ratio of 6:5 2 Nano oxide, then resin: (CuO+SnO by weight 2 )=5:3. Weigh 60wt% water-soluble phenolic resin solution, add deionized water to prepare 15wt% solution. The obtained solution was dried with an air flow spray dryer, and the feed solution was injected with a peristaltic pump at a speed of 15ml / min; the gas flow rate of the nozzle was controlled by the pressure of the compressed air, and atomization was generated at about 0.4MPa; the air inlet temperature was controlled The temperature at the outlet is 300°C, and the outlet temperature is 130°C; the outlet air is separated and vented by the first-stage vortex. The phenolic resin with core-shell structure obtained by spray drying and spherical powders of tin dioxide and copper oxide were calcined under the protection of high-purity nitrogen at 1000℃ for 5 hours to obtain Cu with a spherical core-shell structure 6 Sn 5 / C composite anode material, figure...

Embodiment 2

[0022] Weigh Co according to the ratio of Co:Sn molar ratio of 1:2 3 O 4 and SnO 2 Nano oxide, then resin: (Co by weight 3 O 4 +SnO 2 )=5:3. Weigh 60wt% water-soluble phenolic resin solution, add deionized water to prepare 15wt% solution. The obtained solution was dried with an air flow spray dryer, and the feed solution was injected with a peristaltic pump at a speed of 15ml / min; the gas flow rate of the nozzle was controlled by the pressure of the compressed air, and atomization was generated at about 0.4MPa; the air inlet temperature was controlled The temperature is 300°C, and the outlet temperature is 120°C; the outlet air is separated and vented by the first-stage vortex. The phenolic resin with core-shell structure obtained by spray drying, tin dioxide and three diamond tetroxide spherical powders were calcined at 900 ℃ under the protection of high-purity nitrogen for 10 hours to obtain spherical core-shell structure CoSn 2 / C composite anode material. Using the ...

Embodiment 3

[0024] Weigh Sb according to the molar ratio of Sb:Sn of 1:1 2 O 3 and SnO 2 Nano oxide, then resin: (Sb by weight 2 O 3 +SnO 2 )=5:1 The alcohol-soluble phenolic resin powder was weighed, and ethanol was added to prepare a 20wt% solution. The obtained solution was dried with an air-flow spray dryer, and the feed solution was injected with a peristaltic pump at a speed of 10ml / min; the gas flow rate of the nozzle was controlled by the pressure of the compressed air, and atomization was generated at about 0.4MPa; the air inlet temperature was controlled The temperature at the outlet is 300°C, and the outlet temperature is 100°C; the outlet air is separated and vented by the first-stage vortex. The core-shell structure phenolic resin and tin dioxide and antimony trioxide spherical powder obtained by spray drying were calcined at 800 °C under the protection of high-purity nitrogen for 10 hours to obtain a spherical core-shell structure SnSb / C composite negative electrode mat...

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Abstract

The invention relates to a method for preparing a nuclear shell structured alloy composite anode material of lithium ion battery through a sponging drying-carbon thermal reduction method, and belongs to the materials science technique field. The method comprises the following procedures: weighing nanometer oxide and an organic macromolecule polymer used for preparing the alloy composite material according to stoichiometric proportion; adding solvent to prepare a solution with certain concentration; carrying out a spray drying process on the solution; and calcining the obtained power at certain temperature, thus obtaining a spherical nuclear shell structured alloy composite anode material of lithium ion battery. The method for preparing a nuclear shell structured alloy composite anode material of lithium ion battery has the advantages of preparing the products with good electrochemical property, low preparation cost and simple technology, and can be directly used in the mass industrial production of the alloy composite anode material of lithium ion battery.

Description

technical field [0001] The invention relates to a method for preparing a core-shell structure lithium ion battery alloy composite negative electrode material by a spray drying-carbothermic reduction method, and belongs to the technical field of material science. Background technique [0002] With the rapid development of the electronics and information industries, a large number of portable electronic products such as mobile communication equipment, notebook computers, and digital products have been widely used, making the society put forward higher requirements for the performance of batteries, especially rechargeable secondary batteries: Higher capacity, smaller size, lighter weight and longer life. Lithium-ion batteries have become a research hotspot due to their high energy density, high operating voltage, good load characteristics, fast charging speed, safety and no pollution, and no memory effect. [0003] Alloy anode materials for lithium ion batteries mainly include...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/36H01M4/38B22F9/08B22F9/20
CPCH01M4/0419H01M4/1393H01M4/133Y02E60/12Y02E60/10
Inventor 任建国闫润宝何向明王莉蒲薇华李建军姜长印万春荣
Owner TSINGHUA UNIV
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