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
CN109119604AInactive Publication Date: 2019-01-01JINAN UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JINAN UNIVERSITY
Publication Date
2019-01-01
Estimated Expiration
Not applicable · inactive patent

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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.
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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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