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A kind of perovskite type solid sodium ion electrolyte material and preparation method thereof

An electrolyte material and perovskite-type technology, which is applied in the field of perovskite-type solid sodium ion electrolyte materials and its preparation, can solve the problems of poor chemical stability and low conductivity, and achieve improved performance, increased ion conductivity, and enhanced The effect of chemical stability

Active Publication Date: 2021-04-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Claims
  • Application Information

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Problems solved by technology

[0005] Purpose of the invention: In order to solve the problems of low conductivity and poor chemical stability of existing sodium ion solid electrolyte materials, the first aspect of the present invention provides a perovskite solid sodium ion electrolyte material, and the second aspect provides the calcium Preparation method of titanium ore type solid sodium ion electrolyte material

Method used

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  • A kind of perovskite type solid sodium ion electrolyte material and preparation method thereof
  • A kind of perovskite type solid sodium ion electrolyte material and preparation method thereof
  • A kind of perovskite type solid sodium ion electrolyte material and preparation method thereof

Examples

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Embodiment 1

[0021] The perovskite type solid sodium ion electrolyte material is synthesized by traditional solid phase method, x=0.08, weigh 0.1766g sodium carbonate, 0.7693g lanthanum oxide, 0.9242g zirconium oxide, 0.3323g niobium oxide (analytical purity, purity 99.9%), added to 40mL of isopropanol, milled using a zirconia ball mill jar, the mass ratio of zirconia ball milling beads to the material to be milled was 20:1, 300rpm ball milled for 24h, and the resulting slurry was suction-filtered and dried to obtain a white powder. Put the white powder into a box-type resistance furnace for calcination at 900°C, with a heating rate of 3°C min -1 , heat preservation 10h, then cooled to room temperature. Add 40 mL of isopropanol to the calcined powder, and use a zirconia ball mill jar to mill again for 24 hours at a speed of 300 rpm. The resulting slurry was suction-filtered and dried, pressed into sheets to obtain ceramic sheets, and put into a box-type resistance furnace for sintering at...

Embodiment 2

[0024] The structural formula of the perovskite type solid sodium ion electrolyte material is the same as in Example 1, and the preparation method is the same as in Example 1. The difference is that the rotating speed of the two ball mills is 200rpm, and the ball milling time is 48h; the sintering temperature after being pressed into sheets is 1200°C.

Embodiment 3

[0026] The structural formula of the perovskite-type solid sodium ion electrolyte material is the same as in Example 1, and the preparation method is the same as in Example 1, except that the ball milling time is 48 hours during the two ball millings; the sintering temperature after pressing into tablets is 1300°C.

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Abstract

The invention discloses a perovskite type solid sodium ion electrolyte material, the general chemical structure formula of which is Na 1 / 3 La 5 / 9‑x Zr 1‑ 3x Nb 3x o 3 , 0.01≤x≤0.10. The invention also discloses a preparation method of the perovskite-type solid sodium ion electrolyte material, which includes the following steps: (1) Adding sodium source, lanthanum source, zirconium source, and niobium source into a dispersant according to the molar ratio of each element for ball milling , the mixed slurry obtained by ball milling is suction-filtered and dried, and then calcined for the first time; (2) the powder obtained by calcining in step (1) is added to the dispersant and ball-milled again, and the mixed slurry obtained by ball-milling is compressed after suction-filtering and drying Formed into flakes, and then calcined for the second time, that is. The perovskite-type solid sodium ion electrolyte material of the present invention solves the problems of leakage and flammability of traditional liquid organic electrolytes; the present invention is synthesized by a traditional solid-phase method, has a simple process, and is expected to be prepared on a large scale.

Description

technical field [0001] The invention relates to a sodium ion battery, in particular to a perovskite type solid sodium ion electrolyte material and a preparation method thereof. Background technique [0002] The increasing price of lithium metal limits the further large-scale and widespread application of lithium-ion batteries. Sodium-ion batteries using metallic sodium as a raw material have similar energy density and similar working principle to lithium-ion batteries, and are regarded as the best candidates to replace lithium-ion batteries. Compared with the lack of lithium resources, sodium resources are widely distributed and reserves Abundant and cheap, sodium-ion batteries are more suitable for large-scale applications such as electric vehicles and energy storage power stations. However, the liquid organic electrolyte widely used in sodium-ion batteries has problems such as easy leakage, flammability, and poor thermal stability, which cannot meet the safety and stabili...

Claims

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Application Information

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IPC IPC(8): C04B35/50C04B35/495C04B35/48
CPCC04B35/48C04B35/495C04B35/50C04B2235/3201C04B2235/442
Inventor 张防赵焱樟张校刚
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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