Porous LLZO ceramic powder inhibitor for thermal battery electrolyte and preparation method of porous LLZO ceramic powder inhibitor

A technology of ceramic powder and electrolyte, applied in the direction of non-flowing electrolyte, chemical instruments and methods, delayed action cells, etc., can solve the problems affecting the power performance of thermal batteries, less salt consumption, and limited porosity of LLZO, etc., to achieve improvement The effect of instantaneous power output performance, easy operation, extended service life and storage time

Pending Publication Date: 2021-10-01
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the LLZO porosity of the porous and loose structure is limited, so that the amount of molten salt electrolyte salt that can be mixed is small (the mass fraction of molten salt is 5-15%), which is far lower than the requirement of molten salt electrolyte content in military thermal battery electrolyte (molten salt Electrolyte content ≥ 40%), which will affect the power performance of the thermal battery

Method used

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  • Porous LLZO ceramic powder inhibitor for thermal battery electrolyte and preparation method of porous LLZO ceramic powder inhibitor
  • Porous LLZO ceramic powder inhibitor for thermal battery electrolyte and preparation method of porous LLZO ceramic powder inhibitor
  • Porous LLZO ceramic powder inhibitor for thermal battery electrolyte and preparation method of porous LLZO ceramic powder inhibitor

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Effect test

Embodiment 1

[0049]Mix LLZO ceramic powder and anhydrous isopropanol solvent at a mass ratio of 1:10, grind for 3 hours at a speed of 1800r / min with a high-speed ball mill, dry in a blast oven at 70°C, and pass through a 80-mesh sieve to fine chemical backup. The above-mentioned refined ceramic powder, polyethylene glycol, lithium hydroxide, and water are configured into a slurry with a solid content of 20%, and the pH of the slurry is adjusted to 11. Toner pore builder, stir well. A spray device with a nozzle diameter of 1mm was used to inject samples, the feed flow rate was controlled at 0.5mL / min, the inlet temperature was 200°C, and the outlet temperature was 82°C. The sprayed powder was collected and calcined at 600° C. for 3 hours in an air atmosphere, and the powder was taken out and placed in an air atmosphere with a temperature of 25° C. and a humidity of 30% for 6 hours as a powder after surface treatment. Prepare an alcohol solution of aluminum triethoxide with a concentration...

Embodiment 2

[0052] Mix LLZO ceramic powder and anhydrous isopropanol solvent at a mass ratio of 1:10, grind for 3 hours with a high-speed ball mill at a speed of 1800r / min, dry in a blast oven at 70°C, and pass through a 80-mesh sieve Refine spare. The above-mentioned refined ceramic powder, polyethylene glycol, lithium hydroxide, and water are configured into a slurry with a solid content of 20%, adjust the pH of the slurry to 11, and then add carbon with a mass fraction of 20% and a diameter of 500nm. Powder pore builder, mix well. A spray device with a nozzle diameter of 1 mm was used for sample injection, the feed flow rate was controlled at 0.5 mL / min, the inlet temperature was 200 °C, and the outlet temperature was 82 °C. The sprayed powder was collected and calcined at 600° C. for 3 hours in an air atmosphere, and the powder was taken out and placed in an air atmosphere with a temperature of 25° C. and a humidity of 30% for 6 hours as a powder after surface treatment. Configure a...

Embodiment 3

[0054] Mix LLZO ceramic powder and anhydrous isopropanol solvent at a mass ratio of 1:10, grind for 3 hours with a high-speed ball mill at a speed of 1800r / min, dry in a blast oven at 70°C, and pass through a 80-mesh sieve Refine spare. The above refined ceramic powder, polyethylene glycol, lithium hydroxide, and water are configured into a slurry with a solid content of 20%, adjust the pH of the slurry to 11, and then add carbon powder with a mass fraction of 30% and a diameter of 500nm Pore-forming agent, stir well. A spray device with a nozzle diameter of 1 mm was used for sample injection, the feed flow rate was controlled at 0.5 mL / min, the inlet temperature was 200 °C, and the outlet temperature was 82 °C. The sprayed powder was collected and calcined at 600° C. for 3 hours in an air atmosphere, and the powder was taken out and placed in an air atmosphere with a temperature of 25° C. and a humidity of 30% for 6 hours as a powder after surface treatment. Configure an al...

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Abstract

The invention discloses a porous LLZO ceramic powder inhibitor for a thermal battery electrolyte and a preparation method of the porous LLZO ceramic powder inhibitor. The porous LLZO ceramic powder inhibitor for the thermal battery electrolyte comprises porous LLZO ceramic powder with a multi-stage composite pore structure and a metal oxide protective film modified on the surface of the porous LLZO ceramic powder in situ. The metal oxide is at least one of SiO2, Al2O3, TiO2, ZrO2,SnO2, and MgO; wherein the mass ratio of the porous LLZO ceramic powder to the metal oxide protective film is (10: 1)-(100: 1). The porous LLZO ceramic powder inhibitor can inhibit overflow of a thermal battery electrolyte and reduce the use of an inert inhibitor, so that the conductivity of the thermal battery electrolyte is improved, the power density of the battery is improved, and the service life of the battery is prolonged.

Description

technical field [0001] The invention relates to a porous LLZO ceramic powder inhibitor for thermal battery electrolyte and a preparation method thereof, belonging to the field of chemical power sources. Background technique [0002] Thermal battery is a molten salt electrolyte storage battery, which is widely used in military fields such as electronic countermeasures, aerospace, and missiles because of its advantages such as long storage time, rapid and reliable activation, wide operating temperature range, and high specific power. In recent years, with the development of weapons and equipment technology, higher requirements have been put forward for the performance of thermal batteries in service states such as high power and rapid activation. Thermal batteries consist of positive and negative electrodes and a molten salt electrolyte. The molten salt electrolyte is solid insulating at room temperature, and when the temperature exceeds the melting point of the molten salt e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/00H01M6/22H01M6/36
CPCC01G25/006H01M6/22H01M6/36
Inventor 温兆银吴梅芬郑楚均常强
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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