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A nanometer Zn @ C negative electrode material for secondary zinc-based battery and preparation method thereof

A zinc-based battery and negative electrode material technology, which is applied in secondary batteries, battery electrodes, nanotechnology for materials and surface science, etc., can solve the problem that battery cycle performance needs to be further improved, and limit the specific surface area and flatness of negative electrode materials. problems, to achieve the effect of increasing the electrochemical reaction area, strong dendrite growth inhibition ability, and good binding force

Inactive Publication Date: 2019-01-01
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the zinc material and carbon fiber material used are only traditional micron-sized materials, which limit the overall specific surface area and flatness of the negative electrode material, and the cycle performance of the battery still needs to be further improved.

Method used

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  • A nanometer Zn @ C negative electrode material for secondary zinc-based battery and preparation method thereof
  • A nanometer Zn @ C negative electrode material for secondary zinc-based battery and preparation method thereof
  • A nanometer Zn @ C negative electrode material for secondary zinc-based battery and preparation method thereof

Examples

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Effect test

Embodiment 1

[0037] figure 1 The preparation process of the nano-Zn@C negative electrode material for secondary zinc-based batteries in the embodiment of the present invention is shown. In this embodiment, the nano-carbon material is CNT, which has a high specific surface area and can significantly increase the electrochemical reaction area of ​​the composite electrode. And it can also be used as a conductive framework for composite electrodes to transport electrons, and is suitable for compounding with nano-zinc. Concrete preparation method is as follows:

[0038] 1. Ultrasonic degreasing of CNTs with a size of 2cm (length) × 2cm (width) × 100μm (thickness) in NaOH 10g / L solution for 1min, and then rinsed with deionized water;

[0039] 2. Treat CNT in HCl 0.2mol / L solution at room temperature for 10s, and then rinse with deionized water;

[0040] 3. According to the concentration of zinc sulfate 100g / L, boric acid 20g / L, and polyacrylamide 1g / L, use deionized water to configure the elec...

Embodiment 2

[0046] The difference between this embodiment and embodiment 1 is that CNF is used instead of CNT. Refer to Example 1 for the remaining parameters and steps.

Embodiment 3

[0048] The difference between this embodiment and embodiment 1 is that GR is used instead of CNT. Refer to Example 1 for the remaining parameters and steps.

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Abstract

The invention belongs to the battery material field, in particular to a nanometer Zn @ C negative electrode material for a secondary zinc-based battery and a preparation method thereof. C in the negative electrode material is a nano carbon material, the thickness of the negative electrode material is 50-100 [mu]m and a Zn grain size is 20-80 nm; the preparation method comprises the following steps: adding nano-carbon material into nano-zinc plating solution for electroplating, then washing with water and drying to obtain the nano-Zn @ C negative electrode material; DC, high frequency forward pulse current or high frequency bi-directional pulse current can be used for electroplating; The nanometer zinc plating solution comprises zinc sulfate, boric acid and grain refiner, the pH value is 1to 3, and the solvent is water. The negative electrode material prepared by the invention has good adhesion, no zinc shedding after 20 times of 90 DEG bending tests, strong dendritic growth inhibitionability, excellent specific capacity, cycle life, coulomb efficiency and magnification performance, and is proved to be good in effect by magnification test and suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of battery materials, and in particular relates to a nano Zn@C negative electrode material for a secondary zinc-based battery and a preparation method thereof. Background technique [0002] With the increasingly prominent energy problems, the development of new renewable energy sources (eg, photovoltaic, wind power and hydropower, etc.) has become a research topic that researchers from all over the world are devoted to. As a clean and efficient electrochemical energy storage device, secondary batteries have high application value and development prospects in large-scale energy storage fields such as civil, national defense, and aerospace. Among the existing secondary battery systems (Ni-MH batteries, lead-acid batteries, lithium-ion batteries, sodium-ion batteries, nickel-cadmium batteries, supercapacitors and zinc-based batteries), zinc-based batteries are the only ones that can simultaneously achieve high-power fast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/36B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/362H01M4/38H01M4/62H01M4/625H01M4/628H01M10/36Y02E60/10
Inventor 李庆阳涂小慧李卫
Owner JINAN UNIVERSITY
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