Preparation method of solid-state sodium-ion battery electrolyte

Abstract

The invention discloses a preparation method of solid-state sodium-ion battery electrolyte. The preparation method comprises the following steps: dissolving sodium sulfide into 1L of deionized water; heating the mixed solution in a thermostat water bath to 80-90 DEG C; adding sodium antimonite and NH4F into the mixed solution, wherein the mass ratio of sodium sulfide, sodium antimonite and NH4F is 3.5-1.5:1:0.5-2.5; slowing stirring the mixed solution for 3-4h, naturally cooling to room temperature and filtering; drying at the temperature of 70-80 DEG C in a drying box and then heating up to 300-400 DEG C for a reaction in a furnace tube. The chemical formula of the prepared solid-state sodium-ion battery electrolyte is Na3-xSbS4-xFx, the electrolyte contains F ions, is in a nano-structure and is formed by stacked nanosheets; a lot of gaps are contained between every two adjacent nanosheets. The doped F ions provide an efficient channel for conductive ions. When the electrolyte is applied in a sodium-ion battery, the rate capability and the cycling stability of the battery can be enhanced.

Description

technical field

[0001] The invention relates to the field of sodium ions, in particular to a method for preparing an electrolyte for a solid-state sodium ion battery. Background technique

[0002] In recent years, with the rapid development of electronic equipment, electric tools, and low-power electric vehicles, research on energy storage materials with high energy efficiency, abundant resources, and environmental friendliness has become an irresistible trend. In order to meet the large-scale market demand, it is far from enough to measure battery materials only by energy density, charge-discharge rate and other properties. Whether the manufacturing cost and energy consumption of batteries pollute the environment and the recycling rate of resources will also become important indicators for evaluating battery materials.

[0003] Sodium is one of the most abundant elements on the earth. It has similar chemical properties to lithium. However, sodium-ion batteries have many ad...

Examples

Embodiment 1

[0012] Sodium sulfide was dissolved in 1L deionized water, then placed in a constant temperature water bath and heated to 80°C, and sodium antimonate and NH4F were added. The mass ratio of sodium sulfide, sodium antimonate and NH4F was 3.5:1:0.5. After stirring slowly for 4 hours, it was naturally cooled to room temperature and filtered. Dry in an oven at 80°C, then place in a furnace tube, heat to 300°C for reaction, pass in argon as a protective atmosphere, keep warm for 2 hours, and then cool naturally to room temperature. form Na 2.5 Sb 3.5 f 0.5 Lumpy solid where x = 0.5.

Embodiment 2

[0014] Sodium sulfide was dissolved in 1L of deionized water, then placed in a constant temperature water bath and heated to 90°C, and sodium antimonate and NH4F were added. The mass ratio of sodium sulfide, sodium antimonate and NH4F was 1.5:1:2.5. After stirring slowly for 3 hours, it was naturally cooled to room temperature and filtered. Dry it in an oven at 80°C, then put it in a furnace tube, heat it to 400°C for reaction, pass in argon as a protective atmosphere, keep it warm for 1 hour, and then cool it down to room temperature naturally. form Na 0.5 Sb 1.5 f 0.5 Lumpy solid where x = 2.5.

Embodiment 3

[0016] Sodium sulfide was dissolved in 1L deionized water, then placed in a constant temperature water bath and heated to 90°C, and sodium antimonate and NH4F were added. The mass ratio of sodium sulfide, sodium antimonate and NH4F was 3:1:1. After stirring slowly for 3 hours, it was naturally cooled to room temperature and filtered. Dry in an oven at 70°C, then place in a furnace tube, heat to 300°C for reaction, pass in argon as a protective atmosphere, keep warm for 1 hour, and then cool naturally to room temperature. form Na 2 Sb 3 F Lumpy solid where x=1.

technical field

[0001] The invention relates to the field of sodium ions, in particular to a method for preparing an electrolyte for a solid-state sodium ion battery. Background technique

[0002] In recent years, with the rapid development of electronic equipment, electric tools, and low-power electric vehicles, research on energy storage materials with high energy efficiency, abundant resources, and environmental friendliness has become an irresistible trend. In order to meet the large-scale market demand, it is far from enough to measure battery materials only by energy density, charge-discharge rate and other properties. Whether the manufacturing cost and energy consumption of batteries pollute the environment and the recycling rate of resources will also become important indicators for evaluating battery materials.

[0003] Sodium is one of the most abundant elements on the earth. It has similar chemical properties to lithium. However, sodium-ion batteries have many ad...

Examples

Embodiment 1

[0012] Sodium sulfide was dissolved in 1L deionized water, then placed in a constant temperature water bath and heated to 80°C, and sodium antimonate and NH4F were added. The mass ratio of sodium sulfide, sodium antimonate and NH4F was 3.5:1:0.5. After stirring slowly for 4 hours, it was naturally cooled to room temperature and filtered. Dry in an oven at 80°C, then place in a furnace tube, heat to 300°C for reaction, pass in argon as a protective atmosphere, keep warm for 2 hours, and then cool naturally to room temperature. form Na 2.5 Sb 3.5 f 0.5 Lumpy solid where x = 0.5.

Embodiment 2

[0014] Sodium sulfide was dissolved in 1L of deionized water, then placed in a constant temperature water bath and heated to 90°C, and sodium antimonate and NH4F were added. The mass ratio of sodium sulfide, sodium antimonate and NH4F was 1.5:1:2.5. After stirring slowly for 3 hours, it was naturally cooled to room temperature and filtered. Dry it in an oven at 80°C, then put it in a furnace tube, heat it to 400°C for reaction, pass in argon as a protective atmosphere, keep it warm for 1 hour, and then cool it down to room temperature naturally. form Na 0.5 Sb 1.5 f 0.5 Lumpy solid where x = 2.5.

Embodiment 3

[0016] Sodium sulfide was dissolved in 1L deionized water, then placed in a constant temperature water bath and heated to 90°C, and sodium antimonate and NH4F were added. The mass ratio of sodium sulfide, sodium antimonate and NH4F was 3:1:1. After stirring slowly for 3 hours, it was naturally cooled to room temperature and filtered. Dry in an oven at 70°C, then place in a furnace tube, heat to 300°C for reaction, pass in argon as a protective atmosphere, keep warm for 1 hour, and then cool naturally to room temperature. form Na 2 Sb 3 F Lumpy solid where x=1.

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