Organic and inorganic composite all-solid-state electrolyte and all-solid-state battery formed from same

An inorganic composite, all-solid-state technology, applied in non-aqueous electrolyte battery, electrolyte battery manufacturing, solid electrolyte and other directions, can solve the problems of complex preparation process, poor flexibility and high cost

Inactive Publication Date: 2016-07-27
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the ion conductivity at room temperature is high, the inorganic solid electrolyte is brittle, poor in flexibility, complex in preparation process, and high in cost

Method used

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  • Organic and inorganic composite all-solid-state electrolyte and all-solid-state battery formed from same
  • Organic and inorganic composite all-solid-state electrolyte and all-solid-state battery formed from same
  • Organic and inorganic composite all-solid-state electrolyte and all-solid-state battery formed from same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077]Add 2g of polypropylene carbonate and 18g of N,N-dimethylacetamide into a 100ml reagent bottle, then stir at room temperature for 6h to obtain a homogeneous polypropylene carbonate solution. Then 0.2g lithium dioxalate borate and 0.25g Li 7 La 3 Zr 2 o 12 Added to the above homogeneous solution, stirred at room temperature for 1 day to obtain a uniform mixed solution. The solution was evenly poured onto the cellulose non-woven fabric, dried in a vacuum oven at 60°C for 1 day, and dried to obtain polypropylene carbonate-Li 7 La 3 Zr 2 o 12 Organic-inorganic composite all-solid electrolyte.

Embodiment 2

[0079] Add 2g of polypropylene carbonate and 16g of tetrahydrofuran into a 100ml reagent bottle, then stir at room temperature for 6h to obtain a homogeneous polypropylene carbonate solution. Then 0.2g lithium bisfluoromethanesulfonylimide and 0.2g Li 10 GeP 2 S 12 Added into the above homogeneous solution, stirred at room temperature for 12h to obtain a uniform mixed solution. The solution was evenly poured onto the glass fiber, dried in a vacuum oven at 100°C for 1 day, and dried to obtain polypropylene carbonate-Li 10 GeP 2 S 12 Organic-inorganic composite all-solid electrolyte.

Embodiment 3

[0081] Add 4g polyethylene carbonate and 36g N,N-dimethylformamide into a 250ml reagent bottle, then stir at room temperature for 8h to obtain a uniform polyethylene carbonate solution. Then 0.4g lithium perchlorate and 0.5gLi 10 GeP 2 S 12 Add it into the above-mentioned homogeneous solution and stir at room temperature for 15 hours to obtain a uniform mixed solution. The solution was poured evenly on the polyimide non-woven film, dried in a vacuum oven at 60°C for 1 day, and dried to obtain polyethylene carbonate-Li 10 GeP 2 S 12 Organic-inorganic composite all-solid electrolyte.

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Abstract

The invention relates to an organic and inorganic composite all-solid-state electrolyte, in particular to an organic polycarbonate macromolecule and inorganic fast-ion conductor composite all-solid-state electrode and preparation and application of an all-solid-state battery formed from the same. The organic and inorganic composite all-solid-state electrolyte comprises polycarbonate macromolecule, an inorganic fast-ion conductor, a lithium salt and a porous rigid support material, the thickness of the organic and inorganic composite all-solid-state electrolyte is 5-2,000 micrometers, the mechanical strength is 2-150MPa, the room-temperature ionic conductivity is 1*10<-4>-6*10<-3> S / cm, and an electrochemical window is greater than 4V. The organic and inorganic composite all-solid-state electrolyte provided by the invention is easy to prepare and simple to form, has favorable mechanical property, and is relatively high in room-temperature ionic conductivity and relatively wide in electrochemical window; and meanwhile, by the organic and inorganic composite all-solid-state electrolyte, the growth of lithium dendrites of a negative electrode can be effectively prevented, the interface stability is improved, and the long-circulation and safe application performance of the battery are further improved.

Description

technical field [0001] The invention relates to a solid electrolyte, in particular to the preparation and application of an organic-inorganic composite all-solid electrolyte and an all-solid secondary lithium battery composed of the same. Background technique [0002] In recent years, with the development of electric vehicles and grid energy storage, people's demand for high-safety, high-energy-density power batteries and energy storage systems has become more and more urgent. Among commercial electrochemical energy storage devices, lithium-ion batteries are undoubtedly the best choice. At present, there are two main types of electrolytes used in commercial lithium-ion batteries: one is a liquid electrolyte, and the other is a gel electrolyte. The liquid electrolyte consists of lithium salts (such as LiPF 6 , LiTFSI and LiBF 4 etc.), organic solvents (such as cyclic carbonates, chain carbonates, carboxylates, etc.) and various functional additives. Gel electrolyte is a g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056H01M10/052H01M10/0525H01M10/058
CPCH01M10/052H01M10/0525H01M10/056H01M10/058H01M2300/0065H01M2300/0091Y02E60/10Y02P70/50
Inventor 崔光磊张建军温慧婕李阳徐红霞刘志宏高继超
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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