Lithium-sulfur battery all-solid-state electrolyte and preparation method thereof

A technology of lithium-sulfur batteries and electrolytes, applied in the field of all-solid-state electrolytes, to achieve the effects of high safety performance, low synthesis cost, and abundant raw material sources

Inactive Publication Date: 2016-08-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of MOFs in all-solid-state electrolytes for lithium-sulfur batteries still needs further research and reports.

Method used

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  • Lithium-sulfur battery all-solid-state electrolyte and preparation method thereof
  • Lithium-sulfur battery all-solid-state electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Preparation of aluminum-based porous coordination polymers

[0043] 1.5g of Al(NO 3 ) 3 and 0.432g of H 2NDC was dissolved in 40mL of deionized water, transferred to a hydrothermal kettle lined with polytetrafluoroethylene, sealed, heated to 180°C in an oven, hydrothermally reacted under airtight conditions for 24 hours to obtain the reaction product, and filtered the reaction product to obtain a light yellow powder , washed with water until the pH is neutral, and vacuum-dried and dehydrated at 150° C. for 12 hours to obtain an aluminum-based porous coordination polymer.

[0044] (2) Preparation of all-solid-state electrolytes for lithium-sulfur batteries

[0045] Add 0.5g of the aluminum-based porous coordination polymer obtained in step (1) into 10mL of a 0.2M lithium isopropoxide hexane solution and immerse for 7d, then vacuum-dry at 80°C and 0.1MPa to remove the organic solution for 24h , to obtain an aluminum-based porous coordination compound rich in lithi...

Embodiment 2

[0052] (1) Preparation of aluminum-based porous coordination polymers

[0053] 1.5g of Al(NO 3 ) 3 and 0.4584g of H 3 BTB was dissolved in 40mL of deionized water, transferred to a hydrothermal kettle lined with polytetrafluoroethylene, sealed, heated to 180°C in an oven, hydrothermally reacted under airtight conditions for 24 hours to obtain the reaction product, and filtered the reaction product to obtain a light yellow powder , washed with water until the pH is neutral, and vacuum-dried and dehydrated at 150° C. for 12 hours to obtain an aluminum-based porous coordination polymer.

[0054] (2) Preparation of all-solid-state electrolytes for lithium-sulfur batteries

[0055] Add 0.5g of the aluminum-based porous coordination polymer obtained in step (1) into 10mL of a hexane solution with a concentration of 0.2M lithium isopropoxide and immerse for 7d, then vacuum-dry at 80°C and 0.1MPa for 24h to remove the organic solution, Obtain an aluminum-based porous coordination ...

Embodiment 3

[0062] (1) Preparation of aluminum-based porous coordination polymers

[0063] 1.5g of Al(NO 3 ) 3 and 0.28 g of H 3 BTC was dissolved in 40mL of deionized water, transferred to a hydrothermal kettle lined with polytetrafluoroethylene, sealed, heated to 180°C in an oven, hydrothermally reacted under airtight conditions for 24 hours to obtain the reaction product, and filtered the reaction product to obtain a light yellow powder , washed with water until the pH is neutral, and vacuum-dried and dehydrated at 150° C. for 12 hours to obtain an aluminum-based porous coordination polymer.

[0064] (2) Preparation of all-solid-state electrolytes for lithium-sulfur batteries

[0065] Add 0.5 g of the aluminum-based porous coordination polymer obtained in step (1) into 10 mL of a 0.2 M lithium isopropoxide hexane solution and immerse for 7 days, then vacuum-dry at 80 ° C and 0.1 MPa for 24 hours to remove the organic solution. Obtain an aluminum-based porous coordination compound r...

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Abstract

The invention relates to a lithium-sulfur battery all-solid-state electrolyte and a preparation method thereof, and belongs to the technical field of battery materials. Aluminum porous coordination polymers are taken as the skeleton of the electrolyte, and lithium salts are distributed into the pores of the skeleton. The preparation method comprises the following steps: adding aluminum porous coordination polymers into an organic solvent of lithium salts to impregnate the polymers, drying the polymers in vacuum, then soaking the polymers in lithium-sulfur battery electrolyte, drying the polymers by inert gas flow, and finally carrying out vacuum drying to obtain the electrolyte. The invention also relates to a lithium-sulfur battery, whose electrolyte is the lithium-sulfur battery all-solid-state electrolyte. The aluminum porous coordination polymers have the advantages of large inner surface area, regular pore structure, and adjustable chemical characteristics. The electrolyte has the advantages of high safety, wide electrochemical window, and good contact between electrolyte and sulfur positive electrode interface, and can be used in lithium-sulfur battery. The preparation method has the advantages of simpleness, energy saving, environment-friendliness, abundant raw materials, low cost, and easiness for massive production.

Description

technical field [0001] The invention relates to an all-solid electrolyte for a lithium-sulfur battery and a preparation method thereof. The electrolyte uses a porous coordination polymer (PCPs) material as a skeleton, is a novel all-solid electrolyte, and belongs to the technical field of battery materials. Background technique [0002] The rapid development of mobile electronic devices and electric vehicles urgently requires the development of higher capacity lithium secondary batteries. However, the lithium secondary batteries widely used in the market are still dominated by traditional lithium-ion batteries, and the limitation of their theoretical capacity makes it difficult to match the development speed of current mobile products. In contrast, lithium-sulfur batteries have a high theoretical specific capacity (1675mAh / g), which is five times that of traditional lithium-ion batteries, and thus have received widespread attention. Moreover, sulfur reserves are abundant, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/052
CPCH01M10/052H01M10/0565H01M2300/0082Y02E60/10
Inventor 陈人杰叶玉胜赖静宁钱骥邢易吴锋李丽
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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