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Preparation method of solid electrolyte nano dispersion liquid of lithium ion battery and solid electrolyte nano dispersion liquid

A technology of solid electrolyte and preparation method, which is applied in the field of solid electrolyte nano-dispersion liquid and lithium-ion battery solid-state electrolyte nano-dispersion liquid. Performance, reducing the effect of material performance loss

Pending Publication Date: 2021-11-26
浙江蓝珧新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in actual production, there are still situations where the performance of the actually prepared lithium-ion batteries is lower than the theoretical performance, or lower than the expected performance, and it is difficult to meet the requirements of downstream application manufacturers.

Method used

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  • Preparation method of solid electrolyte nano dispersion liquid of lithium ion battery and solid electrolyte nano dispersion liquid
  • Preparation method of solid electrolyte nano dispersion liquid of lithium ion battery and solid electrolyte nano dispersion liquid
  • Preparation method of solid electrolyte nano dispersion liquid of lithium ion battery and solid electrolyte nano dispersion liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] 30 parts by mass of Li with a particle size of D50=10um 0.33 La 0.56 TiO 3 The powder, 1 part by mass of sodium dodecyl benzene sulfonate and 100 parts by mass of n-hexane are mixed in a ball mill tank, then zirconium balls are added at a mass ratio of 7:1 to the mass of the balls, and the ball is milled in a ball mill at 450 rpm for 5 hours to obtain Dispersion A1, and then sanding the dispersion A1 in a sand mill at 1500 rpm for 3 hours to obtain Li with a particle size of D50=500 nm 0.33 La 0.56 TiO 3 Dispersion A2.

[0117] Take 20 g of dispersion A2 in a drying dish, and dry it at 60°C for 24 hours to obtain Li 0.33 La 0.56 TiO 3 Powder A3. The resulting powder was pressed into an electrolyte green body, the green body was calcined into an electrolyte sheet, and the conductivity of the electrolyte was tested and calculated.

Embodiment 2

[0124] 20 parts by mass of Li with a particle size of D50 = 800 nm 0.33 La 0.56 TiO 3 After mixing the particles with 100 parts by mass of tetrahydrofuran, they were sanded in a sand mill at 1000 rpm for 2 hours to obtain Li with a particle size of D50=330 nm. 0.33 La 0.56 TiO 3 Dispersion A1.

[0125] Take 20 g of dispersion A2 in a drying dish, and dry it at 60°C for 24 hours to obtain Li 0.33 La 0.56 TiO 3 Powder A3. XRD tests were performed on the electrolyte powders.

Embodiment 3

[0132] 20 parts by mass of LiSr with a particle size of D50 = 300 nm 1.65 Zr 1.3 Ta 1.7 O 9 After the particles are mixed with 100 parts by mass of heptane, they are sanded in a sand mill at 1200 rpm for 3 hours to obtain LiSr with a particle size of D50=200 nm 1.65 Zr 1.3 Ta 1.7 O 9 Dispersion A1.

[0133] Take 10 g of dispersion A1 in a centrifuge tube, centrifuge the dispersion in a high-speed centrifuge at 8000 rpm for 30 min, and take the supernatant A2 to test the lithium content in the supernatant by ICP.

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Abstract

The invention provides a preparation method of a solid electrolyte dispersion liquid, which comprises the following steps: firstly, selecting an organic solvent; the selection mode comprises the following steps: selecting an organic solvent with a pKa value of more than 20 in a water medium or an organic solvent with a pKa value of more than 27 in a DMSO medium; and mixing the organic solvent selected in the previous step with the solid electrolyte powder to obtain the solid electrolyte dispersion liquid. The invention provides a preparation method of a solid electrolyte dispersion liquid, and aims to find a selection method for selecting a proper solvent to prepare a corresponding dispersion liquid, so that the solvent and solid electrolyte nano-powder are mutually stable or do not have obvious reaction, and the solvent and a nano solid electrolyte material respectively maintain original properties. The influence of the solvent on the surface state of the solid electrolyte nanoparticles can be eliminated or reduced, and the material performance loss caused by the influence is reduced.

Description

technical field [0001] The invention belongs to the technical field of solid electrolyte nano-dispersion liquid of lithium ion battery, relates to a preparation method of solid electrolyte dispersion liquid and solid electrolyte dispersion liquid, and particularly relates to a preparation method of solid electrolyte nano-dispersion liquid of lithium ion battery and solid electrolyte nano-dispersion liquid liquid. Background technique [0002] As a pillar industry of the society, the energy industry plays an increasingly important role in the process of modernization. New energy technologies are green, environmentally friendly and renewable, and are gradually replacing traditional fossil energy technologies. As a representative of new energy technology, lithium-ion batteries have experienced rapid development after commercialization in the 1990s, and have gradually become the main force of the energy industry. [0003] However, after nearly 30 years of development, lithium-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/0525
CPCH01M10/0562H01M10/0525H01M2300/0071H01M2300/008Y02E60/10
Inventor 邱纪亮杨琪俞会根
Owner 浙江蓝珧新材料科技有限公司