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Lithium-sulfur system solid electrolyte material for all solid state lithium battery and preparation method

A solid electrolyte and lithium battery technology, applied in the direction of batteries with solid electrolytes, non-aqueous electrolyte batteries, sulfide/polysulfide preparation, etc., can solve the problems of carrier migration and binding

Active Publication Date: 2007-08-08
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

Nevertheless, the oxygen ions (O 2- ) to the conducting ions (Li + and Na + ) still has a strong charge effect, causing the migration of these carriers to be greatly constrained

Method used

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  • Lithium-sulfur system solid electrolyte material for all solid state lithium battery and preparation method

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Embodiment

[0019] Only with A / S=ZrS 2 As a representative, using Li 2 S, P 2 S 5 and ZrS 2 Powder (purity is 99%, 99.0%, 99.0%) is weighed according to the molar ratio of 6:1:1.5 and packed into quartz glass tube, vacuumized (less than 10 -2 Pa) and sealed with a hydrogen-oxygen flame, the glass tube containing the mixture is slowly heated to 450°C and kept for 24 hours, and then heated to 600°C-750°C for solid phase reaction, the reaction time is 10-14h. After water-cooling and quenching, the tube is opened, and the powder is ground under the protection of argon atmosphere. Finally, it is pressed into tablets (diameter 10mm, thickness 1mm, pressure 10MPa), and a layer of indium film is pressed on the surface as a conductive electrode, and finally a bulk material of a solid electrolyte is made.

[0020] The conductivity test (see Figure 1) shows that it has ionic conductivity, and the characteristic straight line of ionic conductivity can be clearly observed at the low frequency end...

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Abstract

The invention relates to one solid electrolyte materials and its process method for fix lithium battery, which is characterized by the following:four types of different sulfur compounds as Li2S:A / S:P2S5=6:0.1-4.0:1.5 for compound to form non-crystal system to provide more effective paths for lithium ion transmission to get higher ion conductive rate; the said A for Ag, Zn, Al or Zr with sample of Li2S-ZrS2-P2S5 with room ion battery conductive rate as 9.60X10-6S / cm and lower electron conductive rate under 150 degrees for 3.30X10-4S / cm.

Description

technical field [0001] The invention relates to a lithium-sulfur system solid electrolyte material that can be used in an all-solid-state lithium battery and a preparation method thereof, and the lithium-sulfur system solid electrolyte material is expressed as Li 2 S-A / S-P 2 S 5 (A=Ag, Zn, Al, Zr). The material system mainly behaves as a lithium ion conductor at room temperature and higher temperature (≤160° C.), and belongs to the field of solid electrolyte materials for energy. Background technique [0002] With the widespread application of portable electrical appliances such as mobile phones, video cameras and notebook computers, lithium-ion second-generation batteries are very popular. These batteries have the advantages of high output voltage, high energy storage density, and portability. At present, most of the electrolytes used in lithium batteries contain volatile and flammable organic solvents. In order to manufacture batteries with higher output voltage, high...

Claims

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Application Information

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IPC IPC(8): H01M6/18H01M10/02H01B1/10C01B17/20
CPCY02E60/10
Inventor 刘战强黄富强杨建华曹珍珠孙军康
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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