Preparation method of LATP solid electrolyte

A solid electrolyte and solid technology, applied in the field of preparation of LATP solid electrolyte, can solve the problems of many raw materials, large amount of waste gas, large difference in particle size of raw materials, etc., and achieve the effect of no impurity performance.

Pending Publication Date: 2021-07-27
深圳市新创材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects in the prior art, the present invention provides a method for preparing LATP solid electrolyte, which overcomes the disadvantages of using more raw materials for preparing LATP, the large difference in particle size of the raw materials, and the large amount of waste gas in the sintering process. Micron-sized particles of Ti with high purity were prepared by the method 3 (PO 4 ) 4 , and then micron-sized particles of Li 3 PO 4 , AlPO 4 LATP is mixed and sintered, and the obtained solid electrolyte LATP has no impurity phase and excellent performance

Method used

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  • Preparation method of LATP solid electrolyte
  • Preparation method of LATP solid electrolyte
  • Preparation method of LATP solid electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh TiOSO 4 Dissolve 480g of solid particles in 2000g of deionized water, add an appropriate amount of sulfuric acid dropwise to adjust the pH of the solution to 1, stir and dissolve to obtain TiOSO with a concentration of 1.5mol / L 4 aqueous solution.

[0027] Weigh 21 g of NaF solid particles and dissolve in 1000 g of deionized water, stir and dissolve to obtain a NaF aqueous solution with a concentration of 0.5 mol / L.

[0028] Measure 274mL of 85% phosphoric acid solution and dissolve it in 1726g of deionized water, stir evenly to obtain H2O with a concentration of 2mol / L 3 PO 4 aqueous solution.

[0029] Add 1000 g of deionized water to the reactor, add an appropriate amount of sulfuric acid to adjust the pH of the solution to 1, add 10.5 g of NaF solid particles, start stirring and mix evenly, and heat the reactor to 50°C.

[0030] The prepared TiOSO 4 aqueous solution, NaF aqueous solution, H 3 PO 4 The aqueous solution is input into the reactor to react i...

Embodiment 2

[0035] Weigh TiOSO 4 Dissolve 480g of solid particles in 2000g of deionized water, add an appropriate amount of sulfuric acid dropwise to adjust the pH of the solution to 1, stir and dissolve to obtain TiOSO with a concentration of 1.5mol / L 4 aqueous solution.

[0036] Weigh 21 g of NaF solid particles and dissolve in 1000 g of deionized water, stir and dissolve to obtain a NaF aqueous solution with a concentration of 0.5 mol / L.

[0037] Measure 274mL of 85% phosphoric acid solution and dissolve it in 1726g of deionized water, stir evenly to obtain H2O with a concentration of 2mol / L 3 PO 4 aqueous solution.

[0038] Add 1000g of deionized water to the reactor, add an appropriate amount of sulfuric acid to adjust the pH to 1, add 10.5g of NaF solid particles, start stirring and mixing evenly, and heat the reactor to 50°C.

[0039] The prepared TiOSO 4 aqueous solution, NaF aqueous solution, H 3 PO 4 The aqueous solution is input into the reactor to react in parallel, whe...

Embodiment 3

[0044] Weigh TiOSO 4 Dissolve 480g of solid particles in 2000g of deionized water, add an appropriate amount of sulfuric acid dropwise to adjust the pH of the solution to 1, stir and dissolve to obtain TiOSO with a concentration of 1.5mol / L 4 aqueous solution.

[0045] Weigh 21 g of NaF solid particles and dissolve in 1000 g of deionized water, stir and dissolve to obtain a NaF aqueous solution with a concentration of 0.5 mol / L.

[0046] Measure 274mL of 85% phosphoric acid solution and dissolve it in 1726g of deionized water, stir evenly to obtain H2O with a concentration of 2mol / L 3 PO 4 aqueous solution.

[0047] Add 1000g of deionized water to the reactor, add an appropriate amount of sulfuric acid to adjust the pH to 1, add 10.5g of NaF solid particles, start stirring and mixing evenly, and heat the reactor to 50°C.

[0048] The prepared TiOSO 4 aqueous solution, NaF aqueous solution, H 3 PO 4 The aqueous solution is input into the reactor to react in parallel, whe...

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Abstract

The invention discloses a preparation method of an LATP solid electrolyte, and relates to the technical field of lithium ion secondary battery solid electrolyte preparation, the preparation method comprises the following steps: S1, adding TiOSO4 into deionized water, mixing to prepare a TiOSO4 aqueous solution, adjusting the pH value, and preparing the TiOSO4 aqueous solution with the adjusted pH value for later use; S2, adding NaF into deionized water to prepare a NaF aqueous solution for later use; S3, adding H3PO4 into deionized water to prepare an H3PO4 aqueous solution for later use; S4, adding deionized water, NaF and H2SO4 into a reaction kettle, preparing and heating a mixed bottom water solution, adding a TiOSO4 solution, a NaF solution and a H3PO4 solution into the mixed bottom water solution at the same time, conducting solid-liquid separation, washing and drying prepared solids, and preparing Ti3 (PO4) 3 solid powder; and S5, adding an AlPO4 solid and a Li3PO4 solid into the Ti3 (PO4) 3 solid powder, mixing, sintering, crushing and sieving to obtain the LATP solid electrolyte.

Description

technical field [0001] The invention relates to the technical field of preparation of solid-state electrolytes for lithium-ion secondary batteries, in particular to a method for preparing LATP solid-state electrolytes. Background technique [0002] As lithium-ion batteries are used in 3C digital, power, and energy storage fields, the industry has put forward higher requirements for the safety and energy density of lithium-ion batteries. Solid electrolyte is the most promising new battery material. Compared with traditional liquid electrolytes, solid-state electrolytes have the advantages of low flammability, high thermal stability, no leakage, and low explosion hazard, which greatly improves the safety performance of lithium-ion batteries. Solid electrolytes can effectively inhibit the growth of lithium dendrites due to their excellent mechanical strength, and take advantage of the high energy density and power density of lithium metal batteries. [0003] There are many ty...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/0525
CPCH01M10/0562H01M10/0525H01M2300/0068Y02E60/10
Inventor 王伟东杨凯关豪元丁倩倩
Owner 深圳市新创材料科技有限公司
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