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

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...

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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 components such as binders or conductive agents to make electrodes, which limits the volumetric energy density.

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