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Preparation method of all-solid-state sulfide electrolyte for lithium ion battery

A technology for sulfide electrolytes and lithium-ion batteries, applied in the manufacture of electrolyte batteries, electrolytes, non-aqueous electrolyte batteries, etc., can solve problems such as hydrogen sulfide gas corrosion, electrode flatulence, etc., to inhibit corrosion, improve conductivity, and improve cycle performance Effect

Inactive Publication Date: 2021-02-26
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is extremely sensitive to moisture and will produce a large amount of hydrogen sulfide gas to corrode electrodes and cause flatulence

Method used

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  • Preparation method of all-solid-state sulfide electrolyte for lithium ion battery
  • Preparation method of all-solid-state sulfide electrolyte for lithium ion battery
  • Preparation method of all-solid-state sulfide electrolyte for lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Will Li 2 S, P 2 S 5 Mix with the doped powder evenly according to the stoichiometric ratio, then add it to the vacuum silicon tube, and use micro-arc oxidation discharge for heat treatment to obtain doped solid electrolyte powder; the metal elements of the doped powder are magnesium and germanium; doped solid electrolyte powder In the preparation of electrolyte particles, Li 2 S, P 2 S 5 , The molar ratio of the doped powder is 1:0.7:0.3; the output voltage of the micro-arc oxidation discharge is 580V, the temperature is 86°C, and the time is 56min;

[0031] (2) Mix the doped solid electrolyte particles with epoxy resin and nano-silica evenly, and then add a coupling agent for stirring, so that the epoxy resin is coupled with nano-silica to coat the particles, and the coating treatment is obtained. Doping solid electrolyte particles; the coupling agent is isopropyl titanate triisostearate; in the preparation of coated doped solid electrolyte particles, doping ...

Embodiment 2

[0038] (1) Will Li 2 S, P 2 S 5 Mix with the doping powder evenly according to the stoichiometric ratio, then add it to the vacuum silicon tube, and use micro-arc oxidation discharge for heat treatment to obtain the doped solid electrolyte powder; the metal elements of the doped powder are gallium and selenium; the doped solid electrolyte powder In the preparation of electrolyte particles, Li 2 S, P 2 S 5 , The molar ratio of the doped powder is 1:0.5:0.1; the output voltage of the micro-arc oxidation discharge is 500V, the temperature is 80°C, and the time is 60min;

[0039] (2) Mix the doped solid electrolyte particles with epoxy resin and nano-silica evenly, and then add a coupling agent for stirring, so that the epoxy resin is coupled with nano-silica to coat the particles, and the coating treatment is obtained. Doping solid electrolyte particles; the coupling agent is isopropyl tris(dioctyl phosphate acyloxy) titanate; in the preparation of coated doped solid electro...

Embodiment 3

[0044] (1) Will Li 2 S, P 2 S 5 Mix with the doping powder evenly according to the stoichiometric ratio, then add it into the vacuum silicon tube, and use micro-arc oxidation discharge for heat treatment to obtain the doped solid electrolyte powder; the metal elements of the doping powder are magnesium, selenium, titanium; In the preparation of heterosolid electrolyte particles, Li 2 S, P 2 S 5 , The molar ratio of the doped powder is 1:0.9:0.5; the output voltage of the micro-arc oxidation discharge is 700V, the temperature is 90°C, and the time is 50min;

[0045] (2) Mix the doped solid electrolyte particles with epoxy resin and nano-silica evenly, and then add a coupling agent for stirring, so that the epoxy resin is coupled with nano-silica to coat the particles, and the coating treatment is obtained. Doping solid electrolyte particles; the coupling agent is bis(dioctyloxypyrophosphate) ethylene titanate; in the preparation of coated doped solid electrolyte particles,...

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Abstract

The invention provides a preparation method of an all-solid-state sulfide electrolyte for a lithium ion battery, which comprises the following steps: blending Li2S, P2S5 and doped powder, conducting heating in a vacuum silicon tube, carrying out hydrophobic modification by using perfluorodecyl trichlorosilane, carrying out ultrasonic dispersion, and conducting filtering and drying to obtain the all-solid-state sulfide electrolyte. According to the all-solid-state sulfide electrolyte provided by the invention, through hydrophobic modification, an inorganic phase which is not easy to compound with sulfide is attached to the surfaces of particles to form a hydrophobic coating, so that the erosion of moisture to the sulfide particles is effectively inhibited, and the durability to the moistureis improved, thereby improving the cycle performance of a solid-state lithium battery.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a method for preparing an all-solid sulfide electrolyte for lithium ion batteries. Background technique [0002] A lithium-ion battery is a rechargeable battery that primarily relies on the movement of lithium ions between the positive and negative electrodes to function. During the charging and discharging process, Li + Intercalation and deintercalation back and forth between two electrodes: when charging a battery, Li  + It is deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. Lithium-ion batteries have high energy density, strong stability, no memory effect, and long cycle life, and have been widely used as a commercial high-efficiency energy storage device. [0003] Electrolyte is an important part of lithium-ion...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/0562
CPCH01M10/0562H01M10/058H01M2300/0091H01M2300/0094Y02E60/10Y02P70/50
Inventor 陈庆廖健淞司文彬白涛
Owner CHENDU NEW KELI CHEM SCI CO LTD
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