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Nano sponge carbon composite Cu2O and Cu flexible electrode material and preparation method thereof

A flexible electrode and nano-sponge technology, which is applied in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, battery electrodes, etc., can solve the problem of the combination of active materials and current collectors affecting the stability of electrode functions and affecting the electrochemical performance of materials, etc. problem, achieve good interface integrity, eliminate adverse effects, and achieve high specific capacitance

Inactive Publication Date: 2019-05-03
UNIV OF ELECTRONIC SCI & TECH OF CHINA +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

This method still follows the construction method of the traditional flexible electrode. Simply combining ideal materials together as a flexible coating cannot completely guarantee that the substances in the flexible coating will fall off under the action of the electrolyte, which will seriously affect the electrochemical performance of the material; at the same time, the active The binding performance between the material and the current collector will also directly affect the stable performance of the electrode function.

Method used

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  • Nano sponge carbon composite Cu2O and Cu flexible electrode material and preparation method thereof
  • Nano sponge carbon composite Cu2O and Cu flexible electrode material and preparation method thereof
  • Nano sponge carbon composite Cu2O and Cu flexible electrode material and preparation method thereof

Examples

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Embodiment 1

[0035] This embodiment improves a method for preparing a nano-sponge carbon composite CuO and Cu flexible electrode material, which specifically includes the following steps:

[0036] (1) A melamine nano-sponge whose size is 10×10×30 cm is carbonized at 500° C. for 3 hours under an argon atmosphere to obtain a flexible porous carbon material for subsequent use;

[0037] (2) Soak the flexible porous carbon material prepared in step (1) in a mixed acid solution formed by concentrated nitric acid and concentrated sulfuric acid at 80°C for 2 hours for surface hydroxylation treatment. In the mixed acid solution, concentrated nitric acid and concentrated The volume ratio of sulfuric acid is 3:1, and then the surface hydroxylated flexible porous carbon material is cleaned and dried for future use.

[0038] (3) Dissolve 3.0 g of copper acetate in 50 ml of deionized water, adjust the pH to 7, and sonicate in an ice bath for 30 minutes to obtain a copper precursor solution for later use...

Embodiment 2

[0042] The steps of this example are basically the same as those of Example 1, except that the hydrothermal reaction temperature in Step 5 is changed to 220° C., and the time is changed to 18 hours.

Embodiment 3

[0044] The steps of the present embodiment and embodiment 1 are basically the same, except that the copper source in step 3 is changed to copper chloride.

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Abstract

A nano sponge carbon composite Cu2O and Cu flexible electrode material and a preparation method thereof belong to the technical field of electrode materials. A flexible electrode utilizes a three-dimensional network formed by interweaving with micron-sized carbon fibers and having communicating holes as a skeleton, Cu2O and Cu are grown in the skeleton, and the Cu communicates with a pore networkstructure between the carbon fibers. The three-dimensional network skeleton as a whole is easy to recover under the action of external force, macroscopically present as high flexibility, thus can be directly used as an electrode; and the Cu communicates with broken carbon fibers to form a conductive path, and the overall electrical conductivity of the material can be improved. By utilization of the cladding effect of a porous carbon material formed by carbonization of melamine nano sponge to the Cu and the Cu2O, the specific surface area of the material is effectively increased, and at the same time, a volume change of the Cu2O during a charge and discharge process can also be inhibited, and the energy storage performance of devices is significantly improved.

Description

technical field [0001] The invention belongs to the technical field of electrode materials, in particular to a nano-sponge carbon composite Cu2O and Cu flexible electrode material and a preparation method thereof. Background technique [0002] Due to the Faraday quasi-capacitance generated at the electrode / electrolyte interface, metal oxides can have a capacity of 10 to 100 times that of traditional carbon material electrodes. At present, there are endless reports of transition metal oxides as electrode materials for supercapacitors. Among them, copper-based oxides The advantages of low cost, environmental friendliness, and excellent electrochemical performance make it a very promising electrode material for supercapacitor and electrochemical battery applications. [0003] Cuprous oxide (Cu 2 O) As a typical semiconductor, it also has a low band gap (1.2eV) and a large theoretical capacity (375mAhg -1 ), high safety performance and other advantages, there have been many re...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/46H01G11/86H01M4/36H01M4/48H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCY02E60/10
Inventor 廖家轩吴孟强徐自强巩峰宋尧琛马云飞李湜
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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