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Flower-like multi-level zinc oxide support framework and its preparation method and application

A technology for supporting skeleton and zinc oxide, applied in the field of flower-shaped multi-level structure zinc oxide supporting skeleton and its preparation field, can solve problems such as no supporting skeleton, achieve good charge transport performance, mild reaction conditions and simple preparation process Effect

Active Publication Date: 2016-02-24
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been no reports of supporting frameworks that can meet the preparation requirements and morphology

Method used

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  • Flower-like multi-level zinc oxide support framework and its preparation method and application
  • Flower-like multi-level zinc oxide support framework and its preparation method and application
  • Flower-like multi-level zinc oxide support framework and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1, cleaning treatment of copper foil:

[0037] The copper foil was immersed in acetone, ethanol, and deionized water in sequence, and ultrasonically treated for 10 minutes each to remove the grease on the surface, took it out, rinsed it with deionized water three times, and then placed it in a blast oven at 70°C for drying.

Embodiment 2

[0038] Example 2. Electrodeposition method to prepare flower-like multi-level zinc oxide support framework:

[0039] The cleaned copper foil was used as the working electrode, and the metal platinum sheet electrode and saturated calomel electrode were used as the counter electrode and reference electrode, respectively. In the experiment, potassium chloride, zinc acetate and deionized water were used to prepare an electrodeposition solution containing potassium chloride concentration of 0.1M and zinc acetate concentration of 0.04mM. The working electrode, the counter electrode and the reference electrode are placed in the electrodeposition solution together, the flow rate of continuous oxygen can be set to 6L / h, the rotation speed of the magnetic stirrer is set to 600rpm, and the temperature of the electrodeposition solution is maintained at 85°C. A constant deposition potential of 1.0 V was set between the working electrode and the reference electrode, and the electrodepositio...

Embodiment 3

[0040] Example 3. Electrodeposition method to prepare flower-like multi-level zinc oxide support framework:

[0041] According to the method of Example 2, the flower-shaped multi-level structure zinc oxide support framework is prepared, the difference is that potassium chloride, zinc acetate and deionized water are used to prepare the potassium chloride concentration of 0.1M and the concentration of zinc acetate in this embodiment. For a 0.06 mM electrodeposition solution, set a constant deposition potential of 0.9 V. The resulting flower-like hierarchical zinc oxide support framework is as follows figure 2 shown.

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Abstract

The invention discloses a flower-like multilevel structure zinc oxide support framework, and a preparation method and application thereof. The support framework is a multilevel structure zinc oxide material which grows on a conducting substrate material in situ. The shape of the multilevel structure zinc oxide material is a flower-like multilevel structure composed of a dendriform zinc oxide nano linear array. The dendriform zinc oxide nano linear array is a monocrystalline zinc oxide nano linear array material with a wurtzite crystalline phase structure, which grows in different growth directions accroding to the [001] crystal orientation. The support framework can be used for preparing a composite silicon-base lithium battery negative pole material; and the composite silicon-base lithium battery negative pole material is composed of the support framework, and a metal nickel layer and an amorphous silicon layer which are sequentially coated on the support framework. The flower-like multilevel structure zinc oxide support framework disclosed by the invention has large specific area and has favorable structural stability under multiplied charging / discharging working conditions. The composite silicon-base lithium battery negative pole material prepared from the flower-like multilevel structure zinc oxide support framework has favorable multiplied charging / discharging properties.

Description

technical field [0001] The invention relates to a zinc oxide supporting frame with a flower-like multi-level structure and a preparation method thereof, as well as its application as a supporting frame in the preparation of composite silicon-based lithium battery negative electrode materials. Background technique [0002] Silicon material has the highest theoretical lithium storage capacity (4200mAh / g) among known lithium battery anode materials, and has been intensively studied in the past 20 years. However, the intrinsic charge transport performance of silicon materials is low, and at the same time, the internal stress of silicon materials due to the volume expansion effect in the process of intercalation and delithiation will cause silicon materials to granulate and agglomerate under the working conditions of high rate charge and discharge, and lose Effective conductive contact, so the performance of ordinary silicon-based lithium battery anode materials declines rapidly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/00C30B29/16C30B29/62C30B30/02H01M4/66B82Y30/00
CPCY02E60/10
Inventor 马淳安陈欢
Owner ZHEJIANG UNIV OF TECH
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