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Preparation method of porous copper based lithium ion battery anode material

A technology for lithium-ion batteries and negative electrode materials, applied in the direction of electrode carriers/collectors, etc., can solve the problems of complex preparation process and decreased electrode utilization

Active Publication Date: 2013-10-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Molybdenum disulfide is compounded with carbon materials or conductive polymers to improve its performance, but binders are usually required during the preparation of electrodes, which reduces the utilization rate of electrodes and complicates the preparation process

Method used

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  • Preparation method of porous copper based lithium ion battery anode material
  • Preparation method of porous copper based lithium ion battery anode material
  • Preparation method of porous copper based lithium ion battery anode material

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0023] A preparation method based on porous copper lithium ion battery negative electrode material, comprising steps as follows:

[0024] (1) Preparation of porous copper

[0025] Pretreatment: Cut the copper foil with a thickness of 50um into small pieces of 10mm×20mm size, polish it with #180, #320, #600, #800 water sandpaper in turn, and then polish it with #600, #1000 metallographic sandpaper to remove the surface layer oxide while making the surface as smooth as possible. The polished copper foil was washed successively with acetone and 0.05M sulfuric acid solution to remove the organic matter and residual scale on the surface, and finally the residual sulfuric acid on the surface of the copper foil was washed with deionized water.

[0026] In-situ oxidation: Oxidize the surface of copper foil with constant potential technology on the LK2005A electrochemical workstation, using 0.15M KOH+0.1M NH 4 The mixed solution of Cl was used as the electrolyte, the copper foil was ...

Embodiment 2

[0035] A preparation method of a lithium-ion battery negative electrode material based on porous copper, comprising the following steps:

[0036] (1) Preparation of porous copper

[0037]Pretreatment: Cut the copper foil with a thickness of 50um into small pieces of 10mm×20mm size, polish it with #180, #320, #600, #800 water sandpaper in turn, and then polish it with #600, #1000 metallographic sandpaper to remove the surface layer oxide while making the surface as smooth as possible. The polished copper foil was washed successively with acetone and 0.05M sulfuric acid solution to remove the organic matter and residual scale on the surface, and finally the residual sulfuric acid on the surface of the copper foil was washed with deionized water.

[0038] In-situ oxidation: Oxidize the surface of copper foil with constant potential technology on the LK2005A electrochemical workstation, using 0.15M KOH+0.1M NH 4 The mixed solution of Cl was used as the electrolyte, the copper fo...

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Abstract

The invention relates to a preparation method of a porous copper based lithium ion battery anode material. The preparation method comprises the following steps: using a mixed solution of KOH and NH4Cl as a constant potential oxidation electrolyte to carry out in situ oxidation reduction on copper foil so as to prepare porous copper, depositing molybdenum disulfide on the porous copper by cyclic voltammetry or potentiostatic method by using a mixed solution of (NH4)2MoS4 and KCl as an electrolyte, and carrying out heat treatment so as to obtain an MoS2 / porous copper composite material. As the composite material, which is prepared by the utilization of cyclic voltammetry for deposition of molybdenum disulfide and has large specific surface area, is used as an anode material of a lithium sulphur battery, initial discharging reaches 1900 mAh / g, and cycling basically maintains stable. The composite material obtained by the potentiostatic method for deposition of molybdenum disulfide has good cycling stability and basically has no attenuation after 100 times of cycling.

Description

technical field [0001] The invention relates to a method for preparing a negative electrode material of a lithium ion battery, belonging to the fields of new energy, new materials and the like. Background technique [0002] Copper is a good current collector material, and copper with a porous structure has a larger specific surface and a stronger ability to accommodate active materials, which can greatly increase the capacity of lithium-ion batteries. Patent CN102683656A discloses a high-performance lithium-ion battery three-dimensional porous film silicon-based negative electrode material and its preparation method, using a three-dimensional porous current collector material, such as copper foil mesh, copper wire mesh, foamed copper or nickel foam; magnetron sputtering A layer of silicon film or silicon-metal composite film is formed on copper foil mesh, copper wire mesh, copper foam or nickel foam by spraying method, and then a three-dimensional porous thin film silicon-ba...

Claims

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Application Information

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IPC IPC(8): H01M4/66
CPCY02E60/12Y02E60/10
Inventor 司鹏超李辉范丽娟肖鑫鑫
Owner SHANDONG UNIV