Li2S-P2S5-TiS2 amorphous electrolyte material

A technology of li2s-p2s5-tis2 and electrolyte materials, applied in circuits, electrical components, secondary batteries, etc., can solve the problems of insufficient electrochemical window, poor mechanical strength, and large interface impedance, and achieve mild and high reaction conditions. Room temperature ionic conductivity, the effect of simple preparation process

Active Publication Date: 2013-11-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

However, poor mechanical strength, large interfacial impedance when in contact with electrode active materials, and insufficiently wide electrochemical window are the main obstacles to the use of inorganic solid electrolytes.

Method used

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  • Li2S-P2S5-TiS2 amorphous electrolyte material
  • Li2S-P2S5-TiS2 amorphous electrolyte material
  • Li2S-P2S5-TiS2 amorphous electrolyte material

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Embodiment

[0023] A kind of Li 2 S-P 2 S 5 -TiS 2 It is an amorphous electrolyte material, and the electrolyte material is prepared by the following method:

[0024] Before the reaction, select three kinds of agate balls with large (diameter 10mm), medium (diameter 8mm) and small (diameter 6mm) and a single solvent in the ball mill jar, among which the large, medium and small agate balls are mixed according to the ratio of 5:7:10 The quantity ratio is mixed. Clean the agate balls three times, each time milling the ball mill jar in a solvent at a speed of 300rpm for 30-60 minutes, or repeat several times until the agate balls are cleaned; finally, dry the ball mill jar and the agate balls for later use. The solvents selected for each cleaning are detergent, deionized water, and absolute ethanol in sequence, and the solvent level is lower than 2 / 3 of the volume of the ball mill tank.

[0025] (1) High energy ball milling reaction:

[0026] In a glove box with argon atmosphere protect...

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Abstract

The invention relates to a Li2S-P2S5-TiS2 amorphous electrolyte material with high room-temperature ironic conductivity, and belongs to the field of preparation of lithium ion battery related materials. The Li2S-P2S5-TiS2 amorphous electrolyte material is prepared by application of high-energy ball milling and low-temperature solid-phase reaction, and a preparation method of the Li2S-P2S5-TiS2 amorphous electrolyte material comprises following steps: in a glove box with argon protective atmosphere, three raw materials Li2S, P2S5 and TiS2 are mixed uniformly at a mole ratio of 34:15:1; agate balls are placed in a ball milling tank, and the mixture of the three raw materials is sealed in argon protective atmosphere, and is subjected to high-energy ball milling treatment; samples after ball milling treatment are added into a tube furnace, and is sintered at 300 DEG C for 3h in argon atmosphere so as to obtain the Li2S-P2S5-TiS2 amorphous electrolyte material. The Li2S-P2S5-TiS2 amorphous electrolyte material is prepared by combining high-energy ball milling and low-temperature solid-phase reaction, so that the Li2S-P2S5-TiS2 amorphous electrolyte material possesses relatively high room-temperature ironic conductivity, preparation technologies are simple, and reaction conditions are mild.

Description

technical field [0001] The present invention relates to a kind of Li 2 S-P 2 S 5 -TiS 2 The invention relates to an amorphous electrolyte material, the electrolyte material has high room-temperature ion conductivity, and belongs to the field of preparation of materials related to lithium-ion batteries. Background technique [0002] Lithium-ion battery electrolytes include organic electrolytes and inorganic solid electrolytes. Because side reactions caused by ions or solvents often occur in organic electrolyte batteries, it is difficult to occur in inorganic solid-state electrolytes. As a substitute for organic electrolytes, inorganic solid-state electrolytes have the advantages of large ion transfer number, good chemical and electrochemical stability, and good processability, and have become one of the important research directions in the field of lithium-ion batteries. However, poor mechanical strength, large interfacial impedance when in contact with electrode active ...

Claims

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Application Information

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IPC IPC(8): H01M10/0562
CPCY02E60/12Y02E60/10
Inventor 陈人杰郑玥雷吴锋李丽陈实
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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