Negative electrode of solid-state battery and preparation method thereof, and solid-state battery

A solid-state battery and negative electrode technology, which is applied in the direction of battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems that the research of solid-state batteries needs to be deepened

Inactive Publication Date: 2019-04-30
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, research on the negative electrode of solid-state batteries needs to be in-depth

Method used

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  • Negative electrode of solid-state battery and preparation method thereof, and solid-state battery
  • Negative electrode of solid-state battery and preparation method thereof, and solid-state battery
  • Negative electrode of solid-state battery and preparation method thereof, and solid-state battery

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Embodiment 1

[0082] Steps to prepare the negative electrode:

[0083] Step 1: Using zinc acetate dihydrate as the zinc source, ethanolamine as the surfactant, and n-propanol as the solvent, mix the above three raw materials, heat and stir with a magnetic stirrer, and obtain a clear, transparent and uniform zinc-containing organic solution (Zn-sol), wherein, the concentration of zinc element in zinc acetate dihydrate is 1mol / L;

[0084] Step 2: carbon paper (its scanning electron microscope picture is referred to Figure 4 , energy dispersive X-ray spectroscopy (EDS) diagram reference Figure 5 ) after being fully wetted in the Zn-sol organic solution, dry in a blast drying oven at 50-200°C for 5-30min to remove excess solvent, and then further heat up at a rate of 5-10°C / min to 500-550°C, keep warm for 10-30min, that is, a zinc oxide layer (bonding layer) is obtained on the surface of the carbon fiber in the carbon paper, and the electron microscope picture of the product obtained in thi...

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Abstract

The invention provides a negative electrode of a solid-state battery and a preparation method thereof, and a solid-state battery. The negative electrode comprises a conductive material, a bonding layer covering the surface of the conductive material, an active material layer arranged on the surface of the bonding layer, and an electrolyte layer covering the surfaces of the active material layer and the bonding layer. The conductive material provides a fast electron channel for the negative electrode, and the electrolyte layer provides a continuous ion channel for the negative electrode, so asto meet the working requirements of the negative electrode. The active material layer can provide high specific capacity for batteries using the negative electrode. The bonding layer can improve the uniformity of distribution of the active material layer on the surface of the conductive material and avoid serious agglomeration of the negative electrode on the surface of the conductive material. The electrolyte layer is arranged on the surface of the active material layer, which not only can further avoid the falling-off of the active material layer, but also can inhibit the expansion effect ofthe active material in the active material layer to a certain extent. Thus, the thickness or volume of the negative electrode will not be changed in the process of battery charging and discharging.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a negative electrode, a preparation method thereof and a solid electrode. Background technique [0002] With the development and progress of society, people's demand for high energy density lithium batteries is becoming stronger and stronger. At present, most commercial lithium batteries use liquid electrolytes containing flammable organic solvents, which are volatile, flammable, and explosive, and have serious safety problems; solid-state batteries are the most promising electrochemical energy storage devices for the next generation. Fundamentally and completely solve the safety problem of the battery. [0003] At present, the negative electrodes of commonly used solid-state batteries mainly include graphite, silicon (Si) negative electrodes, lithium metal, etc. Among them, graphite electrodes have seriously restricted the improvement of battery energy density due to their lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/134H01M4/1395H01M4/36H01M4/38H01M4/62H01M4/66H01M10/052H01M10/0566
CPCH01M4/134H01M4/1395H01M4/366H01M4/386H01M4/626H01M4/663H01M10/052H01M10/0566H01M2004/027Y02E60/10
Inventor 赵晓宁蔡挺威柳在律秦士林王龙飞
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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