Solid sodium ion conductor material and preparation method thereof

A sodium ion conductor and solid-state technology, which is applied in the field of solid sodium ion conductor materials and its preparation, can solve the problems of battery short circuit, low conductivity, and increased cost, and achieve the effects of solving liquid leakage, high ion conductivity, and simple process

Active Publication Date: 2021-01-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Na-β-Al 2 o 3 Has high high temperature ionic conductivity, but low conductivity at room temperature, it is mainly used in high temperature Na-S system batteries
The solid electrolyte with NASICON structure has high room temperature ionic conductivity, but during the high temperature synthesis process, impurity phases will be generated inside the material, resulting in a decrease in conductivity, and in the process of battery charge and discharge, sodium metal negative electrodes are prone to form sodium dendrites. and grow along the grain boundaries, penetrating the electrolyte, causing a short circuit in the battery
Sulfide solid electrolytes have the highest ionic conductivity at room temperature, but chalcogenides contain sulfur that is sensitive to air and moisture, which puts harsh requirements on the production environment of the electrolyte and increases the cost of production

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  • Solid sodium ion conductor material and preparation method thereof
  • Solid sodium ion conductor material and preparation method thereof
  • Solid sodium ion conductor material and preparation method thereof

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Effect test

Embodiment 1

[0024] In the present embodiment, solid sodium ion conductor material chemical structure general formula Na 3x La 2 / 3-x ZrO 3 The value of x in the middle is 0.075, and the corresponding chemical structure is Na 0.225 La 0.592 ZrO 3 . The preparation method of solid sodium ion conductor material refers to figure 1 , the specific method is as follows:

[0025] Weigh 0.1193g of sodium carbonate, 0.9650g of lanthanum oxide and 1.2322g of zirconia and mix them, add 40ml of isopropanol, and ball mill in a ball mill at a revolution speed of 300rpm for 24h. The slurry obtained from the ball mill was suction-filtered and dried at 60° C. for 2 hours to obtain a white powder. Put the obtained white powder into a box-type resistance furnace and heat at 3°C ​​min -1 The heating rate is increased to 900°C for calcination, kept for 10 hours, and cooled to room temperature with the furnace. Add 40ml of isopropanol to the calcined powder, ball mill for 24 hours at a revolution speed ...

Embodiment 2

[0031] In the present embodiment, solid sodium ion conductor material chemical structure general formula Na 3x La 2 / 3-x ZrO 3 The value of x in the middle is 0.16, and the corresponding chemical structure is Na 0.48 La 0.5 ZrO 3 . The preparation method of solid sodium ion conductor material is as follows:

[0032] Weigh 0.2544g of sodium carbonate, 0.8145g of lanthanum oxide and 1.2322g of zirconia and mix them, add 40ml of isopropanol, and ball mill in a ball mill at a revolution speed of 300rpm for 24h. The slurry obtained from the ball mill was suction-filtered and dried at 60° C. for 2 hours to obtain a white powder. Put the obtained white powder into a box-type resistance furnace and heat at 3°C ​​min -1 The heating rate is increased to 900°C for calcination, kept for 10 hours, and cooled to room temperature with the furnace. Add 40ml of isopropanol to the calcined powder, and ball mill for 24 hours at a revolution speed of 300rpm. Suction-filter the slurry obta...

Embodiment 3

[0034]In the present embodiment, solid sodium ion conductor material chemical structure general formula Na 3x La 2 / 3-x ZrO 3 The value of x in the middle is 0.04, and the corresponding chemical structure is Na 0.12 La 0.62 ZrO 3 . The preparation method of solid sodium ion conductor material is as follows:

[0035] Weigh 0.0636g of sodium carbonate, 1.0106g of lanthanum oxide and 1.2322g of zirconia and mix them, add 40ml of isopropanol, and ball mill in a ball mill at a speed of 300rpm for 48h. The slurry obtained from the ball mill was suction-filtered and dried at 60° C. for 2 hours to obtain a white powder. Put the obtained white powder into a box-type resistance furnace and heat at 3°C ​​min -1 The heating rate is increased to 800 ° C for calcination, kept for 12 hours, and cooled to room temperature with the furnace. Add 40 ml of isopropanol to the calcined powder, and ball mill for 48 hours at a rotation speed of 300 rpm. Suction-filter the slurry obtained by b...

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Abstract

The invention discloses a solid sodium ion conductor material, the general chemical structure formula of which is Na 3x La 2 / 3‑x ZrO 3 , the value range of x is 0.04≤x≤0.16. The present invention also discloses a preparation method of the above-mentioned solid sodium ion conductor material, including: 1) mixing and ball milling sodium source, lanthanum source and zirconium source according to the stoichiometric ratio of the general chemical structure formula, and calcining the ball milled product at 800-1000°C; 2) The calcined product of step 1) is ball-milled, and then sintered at 1100-1300° C. to obtain a solid sodium ion conductor material. The solid sodium ion conductor material of the present invention has high ion conductivity, and its room temperature sodium ion conductivity is at 10 ‑7 S cm ‑1 The above can solve the problems of liquid leakage and flammability of traditional liquid organic electrolytes.

Description

technical field [0001] The invention belongs to the technical field of sodium ion batteries, and in particular relates to a solid sodium ion conductor material and a preparation method thereof. Background technique [0002] With the increasing consumption of traditional fossil energy and the gradual aggravation of environmental pollution, the development of new green and sustainable energy has become an important issue facing mankind. The establishment of corresponding large-scale energy storage power stations also needs to be solved urgently. Lithium-ion batteries currently widely used have the characteristics of high energy density and high conversion efficiency. However, due to the limited reserves of lithium resources, with the widespread use of lithium-ion batteries, the price of lithium resources is gradually increasing, making lithium-ion batteries unsuitable for large-scale production. application. Sodium-ion batteries have a similar working principle to lithium-io...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0562H01M10/058H01M10/054
CPCH01M10/054H01M10/0562H01M10/058H01M2220/10H01M2300/0071Y02E60/10Y02P70/50
Inventor 张防赵焱樟张校刚
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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