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Sulfide electrolyte material and preparation method thereof

A technology of sulfide electrolyte and lithium sulfide, which is applied in the manufacture of electrolyte batteries, electrolytes, non-aqueous electrolyte batteries, etc., and can solve problems such as difficult industrial scale production, complicated manufacturing methods, and increased costs

Active Publication Date: 2014-01-08
ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the ionic conductivity of the sulfide-based dielectric material of the above-mentioned patent is relatively high, the manufacturing method is complicated, which greatly increases the cost, and it is not easy to carry out industrial scale production

Method used

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  • Sulfide electrolyte material and preparation method thereof
  • Sulfide electrolyte material and preparation method thereof
  • Sulfide electrolyte material and preparation method thereof

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preparation example Construction

[0024] Therefore, the present application provides a method for preparing a sulfide electrolyte material as shown in formula (I), comprising the following steps:

[0025] mixing lithium sulfide, phosphorus pentasulfide and an organic solution to obtain a mixed solution;

[0026] Stirring, centrifuging, filtering and drying the mixed solution in sequence to obtain the raw material;

[0027] heat-treating the initial material to obtain a sulfide electrolyte material represented by formula (I);

[0028] (100-x) Li 2 S·xP 2 S 5 (I);

[0029] Among them, 20≤x≤60.

[0030] In the process of preparing sulfide electrolyte materials, the first thing to do is the mixing process of raw materials, that is, Li 2 S, P 2 S 5 Mixed with an organic solution to obtain a mixed solution, which can also be called the first raw material. The present invention has no particular limitation on the mixing method, which may be manual mixing or mechanical mixing, and mechanical mixing is pref...

Embodiment 1

[0044] Under the protection of argon atmosphere and at room temperature, Li with a purity of more than 99% 2 S and P 2 S 5 After weighing according to the molar ratio of 70:30, put it into the reaction vessel under the condition that the water content is less than 100ppm, and then add tetrahydrofuran solution (THF) according to the mass ratio of 300%. THF needs to be distilled multiple times with a rotary evaporator to make its water content less than 1%. Add THF and mix evenly to obtain the first primary material. After the first primary material is magnetically stirred at room temperature for 24 hours, a suspension with white precipitate is obtained, which is the second primary material; Centrifuge and separate for 10 minutes, then filter and wash at room temperature, repeat this step 3 times to obtain the fourth primary material; put the fourth primary material in an oven, dry at 80°C for 6 hours to obtain a white solid, that is, the fifth primary material; The initial m...

Embodiment 2

[0050] Under the protection of argon atmosphere and room temperature, Li with a purity of more than 99% 2 S and P 2 S 5 After weighing according to the molar ratio of 80:20, put it into the reaction vessel under the condition that the water content is less than 100ppm, and then add the acetonitrile solution according to the mass ratio of 300%. Acetonitrile needs to be distilled multiple times with a rotary evaporator to make the water content less than 1%. After adding the acetonitrile solution, the first raw material is obtained, and the first raw material is magnetically stirred at room temperature for 24 hours to obtain a green light liquid with white precipitate, which is the second raw material; the second raw material is transferred into a centrifuge tube, and the rotation speed is 10000rpm Centrifuge and separate for 10 minutes, then filter and wash at room temperature, repeat this step 3 times to obtain the fourth primary material; put the fourth primary material in ...

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Abstract

The invention provides a preparation method of a sulfide electrolyte material as shown in a formula (I). The preparation method comprises the steps of mixing lithium sulfide, phosphorus pentasulfide and an organic solution to obtain a mixed solution; stirring, centrifuging, filtering and drying the mixed solution sequentially to obtain an initial material; performing heat treatment on the initial material to obtain the sulfide electrolyte material as shown in the formula (I). In the preparation process of the sulfide electrolyte material, lithium sulfide and phosphorus pentasulfide are dissolved into an organic solvent and react to form a compound containing Li, P and S, the compound and the organic solvent form a crystalline state, and then centrifuging, filtering, drying and heat treatment processes are performed sequentially to obtain the sulfide electrolyte material, so that the preparation method of the sulfide electrolyte material, provided by the invention, is simple and easy to operate.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a sulfide electrolyte material and a preparation method thereof. Background technique [0002] Currently, lithium secondary batteries are widely used in daily life and become an inseparable part of society. Lithium secondary batteries have the advantages of large output power, high energy density, long service life, high average output voltage, small self-discharge, no memory effect, fast charge and discharge, excellent cycle performance and no environmental pollution. The preferred object of rechargeable power supply for electronic products is also considered to be the most competitive vehicle power battery. Lithium secondary batteries are classified into liquid lithium secondary batteries and solid lithium secondary batteries. Among them, a solid-state lithium secondary battery refers to a lithium secondary battery in which each unit of the battery includes a po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/0562
CPCY02E60/12H01M10/0561H01M2300/002Y02E60/10Y02P70/50
Inventor 许晓雄邱志军彭刚陈万超陈晓添
Owner ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
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