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Preparation method of Cu2O/Cu/PPy nanowire composite lithium ion battery negative material

A technology for ion batteries and negative electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as low conductivity and small specific capacity, achieve high specific capacity, improve cycle performance and capacity, and achieve good cycle performance Effect

Active Publication Date: 2012-08-08
浙江长芯光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Cu 2 O is a p-type semiconductor with low conductivity, which leads to Cu 2 The actual specific capacity of O is much smaller than the theoretical capacity

Method used

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  • Preparation method of Cu2O/Cu/PPy nanowire composite lithium ion battery negative material
  • Preparation method of Cu2O/Cu/PPy nanowire composite lithium ion battery negative material
  • Preparation method of Cu2O/Cu/PPy nanowire composite lithium ion battery negative material

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Experimental program
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Effect test

Embodiment 1

[0023] Prepare 0.1 mol / L pyrrole monomer solution and 0.05 mol / L copper acetate solution, and ultrasonically disperse them evenly. Take 10mL of the prepared pyrrole monomer solution and mix it with 65mL of the prepared copper acetate solution, and transfer it to a hydrothermal reaction kettle; place the hydrothermal reaction kettle in an oven, set the temperature to 160°C, and react for 12h; The product obtained by the reaction was washed by centrifugation, and dried at 50 °C for 12 h, and the obtained Cu 2 O / Cu / PPy nanowires were assembled into a button lithium-ion battery, and the electrical properties were analyzed and characterized.

[0024] The resulting Cu 2 SEM images of O / Cu / PPy nanowires, such as figure 1 Shown; Cu 2 XRD diffraction patterns of O / Cu / PPy nanowires, such as figure 2 Shown; Cu 2 Cyclic voltammetry test of O / Cu / PPy nanowires packed into button batteries, such as image 3 Shown; Cu 2 O / Cu / PPy nanowires loaded into a button battery and charged and d...

Embodiment 2

[0026] Prepare a 0.2 mol / L pyrrole monomer solution and a 0.05 mol / L copper acetate solution, and disperse them evenly by ultrasonication. Take 16.25mL of the prepared pyrrole monomer solution and mix it with 65mL of the prepared copper acetate solution, and transfer it to a hydrothermal reaction kettle; place the hydrothermal reaction kettle in an oven, set the temperature to 140°C, and react for 15 hours; The product obtained by the reaction was centrifuged and washed, and dried at 50 ° C for 12 h, and the obtained Cu 2 O / Cu / PPy nanowires were assembled into a button lithium-ion battery, and the electrical properties were analyzed and characterized.

Embodiment 3

[0028] Prepare a 0.2 mol / L pyrrole monomer solution and a 0.05 mol / L copper acetate solution, and disperse them evenly by ultrasonication.

[0029] Take 13.5mL of the prepared pyrrole monomer solution and mix it with 65mL of the prepared copper acetate solution, and transfer it to a hydrothermal reaction kettle; place the hydrothermal reaction kettle in an oven, set the temperature to 130°C, and react for 20h; The product obtained by the reaction was centrifuged and washed, and dried at 50 ° C for 12 h, and the obtained Cu 2 O / Cu / PPy nanowires were assembled into a button lithium-ion battery, and the electrical properties were analyzed and characterized.

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Abstract

The invention relates to a preparation method of a Cu2O / Cu / PPy nanowire composite lithium ion battery negative material. The preparation method comprises the following steps of: (1) preparing pyrrole monomer solution and copper acetate solution and performing ultrasonic treatment to uniformly disperse the solution; (2) mixing the pyrrole monomer solution and the copper acetate solution obtained by the step (1) according to a volume ratio of 1:13-1:3 and transferring into a hydrothermal reaction kettle; (3) placing the hydrothermal reaction kettle in a drying oven to react for 10-20 hours, wherein the temperature of the drying oven is 120-180 DEG C; and (4) centrifugally separating a product obtained by the reaction, washing and then drying to obtain the Cu2O / Cu / PPy nanowire composite lithium ion battery negative material. Compared with the prior art, the material obtained by the invention has higher specific capacity compared with that of the lithium ion battery negative material and has good cycle performance.

Description

technical field [0001] The invention belongs to the technical field of preparation of energy storage materials, in particular to Cu with high specific capacity and high cycle performance 2 The invention discloses a preparation method of an O / Cu / PPy composite nanowire-shaped lithium-ion battery negative electrode material. Background technique [0002] Due to the increasing depletion of energy sources and the increasing pollution of cities, people's demand for new green and efficient energy sources is becoming increasingly urgent. Lithium-ion batteries, as a new energy source with strong advantages, have become the focus of current research. It has many outstanding advantages: light weight, large energy storage, high power, no pollution, no secondary pollution, long life, small self-discharge coefficient, and wide temperature range. [0003] At present, the anode materials used in lithium-ion batteries are generally carbon materials, such as graphite, soft carbon (such as co...

Claims

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Application Information

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IPC IPC(8): H01M4/48
CPCY02E60/12Y02E60/10
Inventor 王英陈瑞余元张亚非
Owner 浙江长芯光电科技有限公司
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