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Spherical germanium-aluminum-lithium phosphate material and composite solid electrolyte prepared from same

A solid electrolyte, germanium aluminum phosphate technology, applied in the field of spherical lithium germanium aluminum phosphate oxide powder materials, composite solid electrolyte, lithium germanium aluminum phosphate material, can solve the problem of electrolyte ion conductivity decline, achieve low viscosity, high Ionic conductivity, high filling effect

Active Publication Date: 2020-12-11
上海国瓷新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, the traditional method of preparing LAGP electrolyte materials in the prior art is a high-temperature solid-phase method, which has the advantages of large output and simple preparation process, but it is also easy to cause Li loss and introduce impurity phases such as aluminum phosphate and germanium dioxide. problems, which in turn lead to a decrease in the ionic conductivity of the electrolyte

Method used

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  • Spherical germanium-aluminum-lithium phosphate material and composite solid electrolyte prepared from same
  • Spherical germanium-aluminum-lithium phosphate material and composite solid electrolyte prepared from same
  • Spherical germanium-aluminum-lithium phosphate material and composite solid electrolyte prepared from same

Examples

Experimental program
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Effect test

Embodiment 1

[0074] The spherical lithium germanium aluminum phosphate powder described in this embodiment, raw materials according to Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 stoichiometric ratio.

[0075] The preparation method of the spherical lithium germanium aluminum phosphate powder described in this embodiment comprises the following steps:

[0076] (1) According to the above stoichiometric ratio, weigh 55.4g of lithium carbonate, 25.5g of aluminum oxide, 156.9g of germanium oxide, and 345.1g of ammonium dihydrogen phosphate, and place them in a ball milling tank; then add 874.3g of ball milling media (the type of ball milling media For zirconia balls, wherein, 174.8g of balls with a diameter of 8cm, 262.3g of balls with a diameter of 5cm, and 437.2g of balls with a diameter of 1.5cm are added, and the purity is 94.6%), and the speed of the ball mill is controlled to be 200r / min for ball milling and dispersing for 4 hours; then filter with a 20-mesh nylon sieve to obtain the precursor ...

Embodiment 2

[0090] The materials and preparation method of the spherical lithium germanium aluminum phosphate powder described in this example are the same as those in Example 1.

[0091] The composite solid electrolyte described in this example is prepared from the following raw materials:

[0092] The spherical lithium germanium aluminum phosphate powder 60g;

[0093] Polyethylene oxide 40g;

[0094] Lithium perchlorate 2.7g.

[0095] The preparation method of the composite solid electrolyte described in this example is the same as that in Example 1.

Embodiment 3

[0097] The materials and preparation method of the spherical lithium germanium aluminum phosphate powder described in this example are the same as those in Example 1.

[0098] The composite solid electrolyte described in this example is prepared from the following raw materials:

[0099] The spherical lithium germanium aluminum phosphate powder 70g;

[0100] Polyethylene oxide 30g;

[0101] Lithium perchlorate 2g.

[0102] The preparation method of the composite solid electrolyte described in this example is the same as that in Example 1.

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Abstract

The invention belongs to the technical field of inorganic composite materials, particularly relates to a germanium-aluminum-lithium phosphate material, more particularly relates to a spherical germanium-aluminum-lithium phosphate oxide powder material, and further discloses a composite solid electrolyte prepared from the spherical germanium-aluminum-lithium phosphate oxide powder material. The spherical germanium-aluminum-lithium phosphate powder material comprises matrix ceramic formed on the basis of a lithium source material, an aluminum source material, a germanium source material and a phosphorus source material, the particle size of the material is 20-80 microns, the crystal form of the material is pure-phase powder, and the phase unicity is good; meanwhile, the spherical shape of the material is beneficial to the dispersion and sliding of the powder, so that obtaining of the composite material with high filling (30 wt% or more), low viscosity and high ionic conductivity is facilitated, and the preparation of the composite solid electrolyte with excellent electrical properties is facilitated.

Description

technical field [0001] The invention belongs to the technical field of inorganic composite materials, specifically relates to a lithium germanium aluminum phosphate material, more specifically relates to a spherical lithium germanium aluminum phosphate oxide powder material, and further discloses a composite solid electrolyte prepared therefrom. Background technique [0002] Lithium-ion batteries are widely used in portable electronic products such as mobile phones, notebook computers, and energy storage devices such as new energy electric vehicles due to their high energy density, long service life, and environmental friendliness. Among the major components of lithium-ion batteries, the electrolyte, as an integral part of lithium-ion batteries, determines the performance of lithium-ion batteries to a large extent. Electrolytes commonly used in lithium-ion batteries in the prior art mainly include: organic liquid electrolytes, ionic liquid electrolytes, solid polymer electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/45H01M10/0525H01M10/056H01M10/058
CPCC01B25/45H01M10/056H01M10/058H01M10/0525H01M2300/0091H01M2300/0065C01P2002/72C01P2004/03C01P2004/32Y02P70/50
Inventor 李智林德宝田琰刘欢彭冲宋锡滨
Owner 上海国瓷新材料技术有限公司
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