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Sulfide solid electrolyte stable to lithium, preparation method thereof and solid-state battery with solid electrolyte

A solid electrolyte and solid-state battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as explosion, unusable, spontaneous combustion, etc., and achieve the effect of improving economic benefits

Pending Publication Date: 2020-03-24
ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In September 2016, the Samsung Note7 mobile phone battery spontaneously ignited and exploded due to design problems, causing bodily harm to users
[0006] However, this type of electrolyte is unstable to lithium metal (reference: Interfacial reactivity and interphase growth of argyrodite solid electrolytes at lithium metal electrodes, Solid State Ionics, 2018, 318, 102-112)
Therefore, it is impossible to use high-capacity metal lithium as the negative electrode

Method used

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  • Sulfide solid electrolyte stable to lithium, preparation method thereof and solid-state battery with solid electrolyte
  • Sulfide solid electrolyte stable to lithium, preparation method thereof and solid-state battery with solid electrolyte
  • Sulfide solid electrolyte stable to lithium, preparation method thereof and solid-state battery with solid electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1a

[0048] Gained Li in 2g comparative example 1 6 P.S. 5 Cl with 0.0331g P 2 S 5 (2mol%) into a 50mL agate-lined ball mill jar, add 50g of zirconia grinding medium balls with a diameter of 5mm, and mix evenly with a planetary ball mill at a speed of 250rpm under the condition that the water content is less than 10ppm, then take out the powder and pass through a 100-mesh sieve net, placed in an electric furnace, and heat-treated at 270 ° C for 4 hours to prepare the Li-Argyrodite electrolyte material of Example 1 with a core-shell structure, as shown in the attached figure 1 shown.

Embodiment 1b

[0050] The wet grinding method can also be used here, such as the obtained Li in 2g Comparative Example 1 6 P.S. 5 Cl with 0.0331g P 2 S 5 (2mol%) into a 50mL agate-lined ball mill jar, add 50g of zirconia grinding media balls with a diameter of 5mm and 6g of n-heptane, mix evenly with a planetary ball mill at a speed of 250rpm under the condition that the water content is less than 10ppm, and then take out the slurry , Dry at 80-120°C to obtain powder. Pass through a 100-mesh sieve, place in an electric furnace, and heat-treat at 270° C. for 4 hours to prepare the Li-Argyrodite electrolyte material of Example 1a with a core-shell structure. Both methods can obtain core-shell structure electrolyte particles with similar properties, and the test is based on Example 1a.

Embodiment 2

[0052] Gained Li in 2g comparative example 1 6 P.S. 5 Cl with 0.0662g P 2 S 5 (4mol%) into a 50mL agate-lined ball mill jar, add 50g of zirconia grinding medium balls with a diameter of 5mm, mix evenly with a planetary ball mill at a speed of 250rpm under the condition that the water content is less than 10ppm, take out the powder, and pass through a 100-mesh sieve The mesh was placed in an electric furnace and heat-treated at 270° C. for 4 hours to prepare the Li-Argyrodite electrolyte material of Example 2 with a core-shell structure.

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PUM

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Abstract

The invention discloses a sulfide solid electrolyte stable to lithium, and relates to the field of solid-state batteries, and the sulfide solid electrolyte takes argyrodite sulfide solid electrolyte as a core, and the surface of the argyrodite sulfide solid electrolyte is coated with a shell layer composed of Li-P-S compounds. By adopting the technical scheme, the Li-P-S compound shell component is generally Li <3>P<S4> or Li <3-x>P<S4-y> lithium-deficient sulfur-phosphorus compound. The compound is relatively stable when being in contact with lithium metal and dry air, so that the purpose ofprotecting the inner core of the argyrodite sulfide solid electrolyte is achieved.

Description

technical field [0001] The invention relates to the field of solid-state batteries, in particular to a lithium-stable sulfide solid electrolyte, a preparation method thereof, and a solid-state battery with the solid electrolyte. Background technique [0002] In the 1990s, Japan's Sony Corporation first successfully launched commercial lithium-ion batteries. Lithium-ion batteries have the advantages of high power density, high voltage, environmental friendliness, and small self-discharge, and are widely used in portable electronic devices such as mobile phones and notebook computers and electric vehicles. After years of development, the industry has formed a complete industrial chain with a high degree of professional segmentation. The application field of lithium-ion batteries has also developed from the initial small digital electronic products to large-scale energy storage products such as electric vehicles and energy storage power stations. According to the data, the to...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M10/0562
CPCH01M10/0562H01M10/0525Y02E60/10
Inventor 许晓雄黄晓吴林斌张秩华
Owner ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
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