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Solid sodium battery and preparation method thereof

A sodium battery and solid-state electrolyte technology, applied in the field of materials, can solve problems such as high cost and complex processing methods, and achieve high production efficiency, low cost, and good safety performance

Inactive Publication Date: 2016-11-16
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned treatment methods are too complicated and costly. We need to find a solution that is simple in preparation process, low in cost, high in production efficiency, and suitable for industrial production.

Method used

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  • Solid sodium battery and preparation method thereof
  • Solid sodium battery and preparation method thereof
  • Solid sodium battery and preparation method thereof

Examples

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Embodiment 1

[0045] Embodiment 1 of the present invention provides a solid sodium battery, which includes a positive electrode, a negative electrode and a solid electrolyte, wherein the positive electrode is modified with a thin layer of a sodium ion conductive material. That is to say, in addition to the positive electrode, negative electrode and solid electrolyte, the solid-state sodium battery also includes a sodium ion conductive material, which is used as a thin layer modification material for the positive electrode in the battery. Preferably, the thin-layer modification material used in the solid-state sodium battery is electrolyte, molten salt or ionic liquid. in,

[0046] Preferably, the electrolyte is NaClO 4 / EC-DEC, NaClO 4 / PC, NaClO 4 / EC-DMC, NaClO 4 / EC-DEC-PC, NaClO 4 / EC-DMC-PC, NaPF 6 / PC, NaPF 6 / EC-DEC, NaFSI / EC-DMC-PC, NaPF 6 / EC-DEC-PC, NaPF 6 / EC-DMC-PC, NaFSI / EC-DEC, NaPF 6 / EC-DMC, NaFSI / EC-DMC, NaFSI / EC-DEC-PC or NaFSI / PC, etc.;

[0047] Preferably, the...

Embodiment 2

[0052] Embodiment 2 of the present invention provides a solid-state sodium battery. The solid-state sodium battery includes a positive electrode, a negative electrode and a solid electrolyte, wherein both the positive electrode and the negative electrode are modified with thin layers of sodium ion conductive materials. That is to say, in addition to the positive electrode, negative electrode and solid electrolyte, the solid-state sodium battery also includes a sodium ion conductive material, which is used as a thin-layer modification material for the positive electrode and the negative electrode in the battery. Preferably, the thin-layer modification material used in the solid-state sodium battery is electrolyte, molten salt or ionic liquid. in,

[0053] Preferably, the electrolyte is NaClO 4 / EC-DEC, NaClO 4 / PC, NaClO 4 / EC-DMC, NaClO 4 / EC-DEC-PC, NaClO 4 / EC-DMC-PC, NaPF 6 / PC, NaPF 6 / EC-DEC, NaFSI / EC-DMC-PC, NaPF 6 / EC-DEC-PC, NaPF 6 / EC-DMC-PC, NaFSI / EC-DEC, Na...

Embodiment 3

[0059] This example provides the preparation method of the solid-state sodium battery in Example 1. Metal Na is used as the negative electrode of the solid-state sodium battery, and the positive electrode is modified with a thin layer, which is carried out when assembling the battery. The preparation process is as follows:

[0060] Mix the positive electrode active material with electrolyte powder, conductive carbon black, and binder in a certain proportion, grind or stir evenly, and apply it to the surface of the ceramic sheet; dry it at room temperature to 120°C, and transfer it to a glove box; put the metal Na is pasted on the other side of the ceramic sheet, and a thin layer of modification material is dropped on the positive side for encapsulation. Preferably, during the preparation process, the mass of the thin-layer modification material is 1-50% of the total mass of the positive electrode.

[0061] The preparation method of the solid-state sodium battery provided in th...

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Abstract

The invention discloses a solid sodium battery and a preparation method thereof. The solid sodium battery comprises a positive electrode, a negative electrode and a solid electrolyte, wherein thin-layer modification is carried out on the positive electrode or the positive electrode and the negative electrode through a sodium-ion conductive material. A preparation method of the solid sodium battery is provided. When metal is taken as the negative electrode, thin-layer modification is carried out on the positive electrode of the solid sodium battery through the sodium-ion conductive material; and when nonmetal is taken as the negative electrode, thin-layer modification is carried out on the positive electrode or the negative electrode of the solid sodium battery through the sodium-ion conductive material. By the solid sodium battery prepared by the method disclosed by the invention, thin-layer modification is carried out on the electrodes, so that the internal resistance of the solid sodium battery is greatly reduced; the cycle performance and the rate capability are excellent; the safety performance is good; and the solid sodium battery has practical value and can be applied to large-scale energy storage equipment for solar power generation, wind power generation, intelligent power grid peak regulation, a distributed power station, a back-up power source or a communication base station.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a solid-state sodium battery and a preparation method thereof. Background technique [0002] Lithium-ion secondary batteries have the advantages of large specific energy density, wide operating temperature range, long charge and discharge life, small self-discharge, and no memory effect. Its mass energy density can reach 280Wh / kg, and it is considered to be the most promising chemical power supply. In recent years, it has shown remarkable development prospects in the fields of power batteries and energy storage batteries. [0003] However, the lithium resources on the earth are not abundant. The abundance of lithium in the earth's crust is only 0.0065%, and the distribution is very uneven. With the coming of electric vehicles and smart grid era in the future, the shortage of lithium resources and the high price It must become an important factor restricting its development. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/62H01M10/054H01M10/058
CPCH01M4/364H01M4/626H01M10/054H01M10/058Y02E60/10Y02P70/50
Inventor 胡勇胜章志珍刘丽露李泓黄学杰陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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