Method for preparing electrode material CuO (cupric oxide) film of lithium ion battery on copper substrate

A lithium-ion battery and electrode material technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low packing density of nanomaterials, limited volume energy density, and large electrode consumption, so as to achieve uniform film morphology, reduce Small first irreversible capacity loss, effect of containment volume

Inactive Publication Date: 2011-11-02
HEFEI UNIV OF TECH
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Problems solved by technology

In addition, the low packing density of nanomaterials also leads to the consumption of a large amount of inert

Method used

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  • Method for preparing electrode material CuO (cupric oxide) film of lithium ion battery on copper substrate
  • Method for preparing electrode material CuO (cupric oxide) film of lithium ion battery on copper substrate
  • Method for preparing electrode material CuO (cupric oxide) film of lithium ion battery on copper substrate

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Embodiment Construction

[0039] Now take copper foil as the base non-limiting embodiment and describe as follows:

[0040] (1) Copper substrate pretreatment

[0041] Cut the copper substrate disc with a diameter of 1.5-1.0cm. The pretreatment of the copper substrate is to ultrasonicate the copper substrate in organic solvents such as acetone and ethanol for 10 minutes, and then place it in 2mol / L sulfuric acid solution for 10 minutes; Finally, the copper substrate is placed in 85wt% phosphoric acid solution for electrochemical polishing, and its voltage is 2-5V;

[0042] (2) Preparation of reaction solution

[0043] 1. Preparation of alkaline aqueous solution

[0044] Take 2-4mL of 10mol / L NaOH solution, add 10-20mL water to it, then add 1mol / L (NH 4 ) 2 S 2 o 8 1-2mL of the solution, and then 1-5mL of 20% ammonia water by mass, and stirred evenly to obtain 14-31mL of alkaline aqueous solution. The concentration of NaOH in alkaline aqueous solution is 1.29-1.43mol / L, (NH 4 ) 2 S 2 o 8 Conce...

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Abstract

The invention provides a method for preparing electrode material CuO (cupric oxide) film of a lithium ion battery on a copper substrate. The method comprises the following steps of: reacting a pretreated copper substrate with a microemulsion for 2-96 hours at room temperature or reacting the pretreated copper substrate with an alkaline aqueoussolution for 40-90 minutes at room temperature; takingout the copper substrate, and washing and drying the copper substrate to obtain a Cu(OH)2 micro-nano multi-level structure film or Cu(OH)2 nano-rod array film; and processing the dried film in an inert atmosphere fro 4-6 hours at a temperature of 150-200 DEG C to obtain a CuO micro-nano multi-level structure film or CuO nano-rod array film with the similar shape. The film is uniform in shape and stable in structure and can be used as an electrode of a lithium ion battery directly; in addition, by using the film, the preparing processes of the electrode can be simplified, the initial dischargespecific capacity of the battery can be improved obviously, the initial irreversible capacity loss can be reduced and the cycle performance and the multiplying power performance can be improved further.

Description

1. Technical field [0001] The invention relates to a preparation method of a lithium ion battery electrode material, in particular to a method for preparing a CuO thin film on a copper substrate. 2. Background technology [0002] As a p-type semiconductor material (Eg=1.2eV), CuO has unique electrical, magnetic, and catalytic properties, and has broad application prospects in the fields of catalysts, thermoelectric materials, sensing materials, and solar cells. The theoretical specific capacity of CuO is 670mAhg -1 , exceeding the theoretical specific capacity of the commonly used graphite negative electrode of 372mAh g -1 . In recent years, CuO nanomaterials have attracted attention as anode materials for lithium-ion batteries. The research group of Professor Zheng Huagui from the University of Science and Technology of China reported the thermal decomposition of CuC at 400 °C 2 o 4 CuO nanopowders with a diameter of 10nm were prepared, and the results showed that at 0...

Claims

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Application Information

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IPC IPC(8): H01M4/1391
CPCY02E60/12Y02E60/122Y02E60/10
Inventor 张卫新曾晖杨则恒王强陈公德
Owner HEFEI UNIV OF TECH
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