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Method for preparing metal-rich modified layer-containing solid electrolyte for sodium cell by inner-transplant method

A solid electrolyte and metal-rich technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, secondary batteries, etc., can solve the problems of low cost and achieve the effects of improved interface performance, simple and easy processing methods, and low prices

Active Publication Date: 2015-01-14
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, an efficient and low-cost method to introduce a metal-rich modification layer on the surface of β″-alumina has not been reported at home and abroad.

Method used

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  • Method for preparing metal-rich modified layer-containing solid electrolyte for sodium cell by inner-transplant method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]The β″-alumina billet is isostatically pressed into a disc, and the binder is burned at 800° C. to obtain a β″-alumina green billet. 5g of nickel oxide and 40g of β″-alumina powder are evenly ball-milled and pressed on the surface of β″-alumina biscuit, and then the sample implanted with nickel oxide is sintered at 1650°C to form β″-alumina ceramics with nickel-rich surface The sintered ceramic sheet was reduced in a hydrogen atmosphere at 600° C. for 4 hours to obtain a β″-alumina ceramic containing a nickel-rich modified layer. figure 1 It is a schematic diagram of the process of implanting a metal nickel modification layer on the surface of β″-alumina in this embodiment.

Embodiment 2

[0036] The β"-alumina billet is isostatically pressed into a disc to obtain a β"-alumina green body. 10g of nickel oxide and 50g of β″-alumina powder are evenly ball-milled and pressed on the surface of the β″-alumina green body, and then the sample implanted with nickel oxide is sintered at 1600°C to form a β″-alumina ceramic with a surface rich in nickel oxide The rest of the content is the same as described in Example 1.

Embodiment 3

[0038] The β″-alumina billet is isostatically pressed into a disc, and the binder is burned at 800° C. to obtain a β″-alumina green billet. 15g of nickel oxalate and 50g of β″-alumina powder were uniformly ball-milled and then pressed on the surface of β″-alumina biscuit, and then the sample implanted with nickel oxalate was sintered at 1650°C to form nickel-rich β″-alumina ceramics.

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Abstract

The invention relates to a method for preparing a metal-rich modified layer-containing solid electrolyte for a sodium cell by an inner-transplant method. The method comprises the following steps of coating the surface of a solid electrolyte blank with a modification solid electrolyte blank material containing a required weight percentage of a metal precursor, carrying out sintering at a required temperature to obtain a solid electrolyte of which the surface is rich in metal oxides, and carrying out solid electrolyte reduction treatment on the solid electrolyte of which the surface is rich in metal oxides to obtain the metal-rich modified layer-containing solid electrolyte.

Description

technical field [0001] The invention belongs to the field of energy materials, and relates to a sodium battery, more specifically, to a solid electrolyte containing a metal-rich modification layer for a sodium battery and a preparation method thereof. Background technique [0002] Medium-temperature reversible sodium batteries, including sodium-sulfur batteries and sodium-nickel chloride batteries (also known as ZEBRA batteries), are due to their high theoretical specific energy (such as ZEBRA batteries are 790Wh kg -1 ), long life, high conversion efficiency, good cycle stability and rate performance, and low preparation and maintenance costs, have become a promising large-scale static energy storage technology, and have shown good performance in power applications Prospects. In addition, sodium batteries usually use β″-alumina ceramics as a solid electrolyte, which has good stability and is a fully sealed battery that does not release any gas during operation, so it is en...

Claims

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Application Information

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IPC IPC(8): H01M10/0562H01M10/058
CPCH01M10/0562H01M10/058H01M10/36Y02E60/10Y02P70/50
Inventor 温兆银胡英瑛吴相伟张敬超吴梅芬
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI