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Preparation method of titanium phosphate/germanium-aluminum-lithium solid electrolyte

A technology of solid electrolyte and titanium phosphate, applied in the direction of solid electrolyte, non-aqueous electrolyte, chemical instruments and methods, etc., can solve the problems of unfavorable industrial production, materials are easy to contain impurities, high heat treatment temperature, etc., and achieve convenient industrial production, ion conductivity The effect of high efficiency and stable product quality

Inactive Publication Date: 2017-10-20
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Currently, Li 1+x Al x m 2-x (PO 4 ) 3 The preparation methods mainly include solid-phase method, co-precipitation method, sol-gel method, melt quenching, hydrothermal, microwave method, etc. Among them, the melting and quenching method requires extremely high heat treatment temperature, and the materials prepared by solid-phase method are easy to contain impurities. Sol-gel, hydrothermal method and other complex processes are not conducive to industrial production

Method used

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  • Preparation method of titanium phosphate/germanium-aluminum-lithium solid electrolyte
  • Preparation method of titanium phosphate/germanium-aluminum-lithium solid electrolyte

Examples

Experimental program
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Embodiment 1

[0033] A kind of Li 1+x al x m 2-x (PO 4 ) 3 The preparation method of the solid electrolyte adopts the molten salt assisted solid phase method, and utilizes the molten salt to become a molten state to provide a liquid environment, which is conducive to the full mixing of the precursors and obtaining Li 1+x al x m 2-x (PO 4 ) 3 x=0-0.7, M=Ti, Ge type solid electrolyte material.

[0034] Specific preparation process:

[0035] Lithium nitrate (LiNO 3 ), aluminum oxide (Al 2 o 3 ), titanium dioxide (TiO 2 ), ammonium dihydrogen phosphate (NH 4 h 2 PO4 ) and molten salt urea (CH 4 N 2 O) Prepare according to the mole fraction ratio of 1.3:0.15:1.7:3:3.

[0036] Put the above materials in a corundum crucible and mix them evenly. Put the powder mixture into a muffle furnace, keep the temperature at 150°C for 3h, then raise the temperature to 700°C for 4h. The obtained powder was put into a high-energy ball mill jar, and ball milled at 150r / min for 2h. The powder ...

Embodiment 2

[0038] A kind of Li 1+x Al x m 2-x (PO 4 ) 3 The preparation method of the solid electrolyte adopts the molten salt assisted solid phase method, and utilizes the molten salt to become a molten state to provide a liquid environment, which is conducive to the full mixing of the precursors and obtaining Li 1+x Al x m 2-x (PO 4 ) 3 x=0-0.7, M=Ti, Ge type solid electrolyte material.

[0039] Specific preparation process:

[0040] Lithium nitrate (LiNO 3 ), aluminum oxide (Al 2 o 3 ), titanium dioxide (TiO 2 ), ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) and molten salt urea (CH 4 N 2 O) Prepare according to the mole fraction ratio of 1.3:0.15:1.7:3:6, and other process parameters are the same as in Example 1.

Embodiment 3

[0042] A kind of Li 1+x Al x m 2-x (PO 4 ) 3 The preparation method of the solid electrolyte adopts the molten salt assisted solid phase method, and utilizes the molten salt to become a molten state to provide a liquid environment, which is conducive to the full mixing of the precursors and obtaining Li 1+x al x m 2-x (PO 4 ) 3 x=0-0.7, M=Ti, Ge type solid electrolyte material.

[0043] Specific preparation process:

[0044] Lithium nitrate (LiNO 3 ), aluminum oxide (Al 2 o 3 ), titanium dioxide (TiO 2 ), ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) and molten salt urea (CH 4 N 2 O) Prepare according to the mole fraction ratio of 1.3:0.15:1.7:3:9, and other process parameters are the same as in Example 1.

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Abstract

The invention relates to a preparation method of a titanium phosphate / germanium-aluminum-lithium solid electrolyte, and belongs to the technical field of solid electrolytes. The preparation method of the titanium phosphate / germanium-aluminum-lithium solid electrolyte is characterized by adopting a molten salt assisted solid phase method, enabling fused salt to become a molten state so as to provide a liquid state environment beneficial to fully mixing a precursor, and obtaining a solid electrolyte material with the characteristics that Li1+xAlxM2-x(PO4)3x is equal to 0 to 0.7 and M is equal to Ti and Ge. The preparation method of the titanium phosphate / germanium-aluminum-lithium solid electrolyte provided by the invention has the advantages of simple production process, convenience in industrial production, high ionic conductivity of the product solid electrolyte material at the room temperature, stable product quality and the like.

Description

technical field [0001] The invention belongs to the technical field of solid electrolytes, in particular to a preparation method of a titanium phosphate / germanium aluminum lithium type solid electrolyte. Background technique [0002] Lithium-ion batteries have been developed rapidly due to their light weight, high energy density and long cycle life, and are widely used in electronic products, energy storage, automobiles and other fields. However, most traditional lithium-ion batteries use organic solvents as electrolytes, which have potential safety hazards such as leakage and flammability, which limit their large-scale application. Therefore, it is a fundamental solution to find all-solid electrolytes to replace organic electrolytes. [0003] In the past two decades, several solid electrolytes such as NASICON-type Li 1+x al x m 2-x (PO 4 ) 3 (M=Ti,Ge), perovskite Li 3x La 2 / 3-x TiO 3 , sulfide, garnet-type Li 7 La 3 Zr 2 o 12 have received widespread attention. ...

Claims

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Application Information

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IPC IPC(8): C01B25/45H01M10/0562
CPCC01B25/45C01P2002/72C01P2006/40H01M10/0562H01M2300/0068Y02E60/10
Inventor 丁飞徐志彬钟海刘建禹唐致远
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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