AgI-Ag2S-P2S5 amorphous fast ion conductor material and preparation method thereof

Abstract

The present invention relates to an AgI-Ag2S-P2S5 amorphous fast ion conductor material and a preparation method thereof. The material is prepared through the following method. The method includes a first step of preparing raw materials Ag2S, P2S5 and AgI according to a proportion in a glove box under nitrogen atmosphere protection, putting the raw materials in a quartz glass tube, vacuuming and sealing the quartz glass tube so as to ensure that the raw materials are in a vacuum environment, and then putting the quartz glass tube in a swing stove for reaction so as to obtain a crystal material, and a second step of putting the crystal material in a ball milling tank, adding a grinding ball and a grinding additive into the ball milling tank, putting the ball milling tank in a planet ball milling machine so as to ball mill the crystal material fully, and drying in vacuum so as to obtain the AgI-Ag2S-P2S5 amorphous fast ion conductor material. The amorphous fast ion conductor prepared in the present invention has higher room temperature ionic conductivity (the ionic conductivity reaches 3.33*10<3>S / cm), and has good stability.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, in particular to an AgI-Ag 2 S-P 2 S 5 Amorphous fast ion conductor material and its preparation method. Background technique [0002] With the development of the information age, electronic products have become an indispensable tool in people's life. The problem of storage and transmission of battery power in electronic products is an urgent problem to be solved today. Considering the safety, environmental protection and safety of materials, fast ion conductor materials (solid electrolytes) have gradually become popular materials for high-performance energy storage devices, and are effective substitutes for liquid electrolytes in some chemical battery devices. The power source of the vehicle can also be used as an energy storage battery, mainly used in energy and solid ion devices. [0003] Fast ion conductors have ionic conductivity comparable to liquid electrolytes and low act...

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Problems solved by technology

[0005] Patent CN104851473A provides a method for preparing amorphous fast ion conductors only by high-energy ball milling, combining AgI with Ag 3 P.S. 4 Composite, ball milled for 15h at a speed of 600rpm, the final prepared 0.2Ag 3 P.S. 4 The room temperature ionic conductivity of 0.8AgI is on the order of 10 -4 S / cm (lower than the currently recognized practicable 10 -3 S / cm), although this method is only realized by ball milling, and the experimental operation is simple, its room temperature ionic conductivity still needs to be improved.

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