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Thin film solid electrolyte material and preparation method thereof

A solid electrolyte and thin film technology, applied in circuits, electrical components, secondary batteries, etc., can solve the problems of complex preparation process and not suitable for industrial production, and achieve the effect of simple equipment requirements, low cost and simple process

Active Publication Date: 2016-10-19
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] LiPON film has high ionic conductivity, good thermodynamic stability and wide electrochemical window, but it is sensitive to water vapor and oxygen in the air. 5 La 3 m 2 o 12 (M = Nb, Ta) and other materials are relatively complicated to prepare and not suitable for industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Li-Mn-(Ti 0.8 Fe 0.2 )-O thin film solid electrolyte, XRD test shows that Li-Mn-(Ti 0.8 Fe 0.2 )-O solid electrolyte crystal form is spinel crystal form; the fitting results after AC impedance test show that Li-Mn-(Ti 0.8 Fe 0.2 )-O solid electrolyte has an electronic conductivity of 1.15×10 -8 S / cm, ionic conductivity is 1.43×10 -5 S / cm, ionic conductivity / electronic conductivity=1.24*10 3 . Its preparation method is:

[0023]1) Mix lithium nitrate, manganese chloride, titanium chloride, and ferric chloride according to the ratio of chemical elements required for the above-mentioned thin film solid electrolyte material, and add 10% citric acid ethanol solution by weight to make a sol;

[0024] 2) Spread the above-mentioned sol evenly on the surface of the cathode film electrode of the Li-Mn-O battery with a homogenizer; the homogenizer can be a Korean INFINEX homogenizer.

[0025] 3) Then dry at 100°C for 20min, then sinter at 1300°C for 6h, and cool to room t...

Embodiment 2

[0027] Li-(Mn 0.76 Y 0.24 )-Ti-O thin film solid electrolyte, XRD test shows that Li-(Mn 0.76 Y 0.24 )-Ti-O solid electrolyte crystal form is spinel crystal form; the fitting results after AC impedance test show that Li-(Mn 0.76 Y 0.24 )-Ti-O solid electrolyte has an electronic conductivity of 7.325×10 -9 S / cm, ionic conductivity is 5.91×10 -5 S / cm, ionic conductivity / electronic conductivity=8.07*10 3 . Its preparation method is:

[0028] 1) Mix lithium nitrate, manganese acetate, titanium tetrachloride, and yttrium chloride evenly according to the chemical element ratio required by the above-mentioned thin film solid electrolyte material, and add 5% citric acid acetic acid solution by weight to make a sol;

[0029] 2) Spread the above-mentioned sol evenly on the surface of the Li-Ti-O battery anode film electrode with a homogenizer; the homogenizer is an American Cee®BenchTop homogenizer.

[0030] 3) Then dry at 120°C for 10min, then sinter at 900°C for 9h, and cool ...

Embodiment 3

[0032] Li-(Mn 0.98 La 0.02 )-(Ti 0.9 Mg 0.1 )-O thin film solid electrolyte, XRD test shows that Li-(Mn 0.98 La 0.02 )-(Ti 0.9 Mg 0.1 )-O solid electrolyte crystal form is spinel crystal form; the fitting results after AC impedance test show that Li-(Mn 0.98 La 0.02 )-(Ti 0.9 Mg 0.1 )-O solid electrolyte has an electronic conductivity of 3.85×10 -9 S / cm, ionic conductivity is 2.77×10 -5 S / cm, ionic conductivity / electronic conductivity=7.19*10 3 . Its preparation method is:

[0033] 1) According to the proportion of chemical elements required for the above-mentioned thin film solid electrolyte material, mix lithium nitrate, manganese dichloride, titanium tetrachloride, lanthanum nitrate, and magnesium chloride evenly, and add acetone citrate with a weight content of 15% to make a sol;

[0034] 2) Spread the above-mentioned sol evenly on the surface of the anode thin film electrode of the Li-Ti-O battery with a homogenizer;

[0035] 3) Then dry at 150°C for 5min, ...

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Abstract

The invention discloses a solid thin film electrolyte material and a preparation method thereof. The solid thin film electrolyte material has a structure as shown in the formula: Li-(Mn1-Xm1x)-(Til-yM2y)-O, wherein, 0<=x<=1, 0<=y<=1, M1 is selected from at least one of La, Sr, Na, Nd, Pr, Sm, Gd, Dy, Y, Eu, Tb and Ba, and M2 is selected from at least one of Mg, W, Al, Ge, Ru, Nb, Ni, Ta, Co, Fe, Zr, Hf, Fe, Cr and Ga. The solid thin film electrolyte material is obtained by using a sol-gel method or radio frequency magnetron sputtering method. The solid thin film electrolyte material has relatively high Li ion conductivity, relatively low electron conductivity and favorable thermodynamic stability, and is particularly suitable for producing solid lithium ion batteries.

Description

technical field [0001] The invention relates to a thin-film solid electrolyte material with good lithium ion conductivity and a preparation method thereof. Background technique [0002] Since its commercialization in the 1990s, lithium-ion batteries have quickly become a substitute for nickel-hydrogen batteries and nickel-cadmium batteries due to their advantages such as high energy density, long cycle life, no memory effect, and environmental friendliness. However, the safety issue of lithium-ion batteries has always been the focus of attention. Lithium-ion battery electrolyte contains flammable organic substances, which are prone to important safety hazards such as electrode corrosion, liquid leakage, and gas generated by decomposition, which will increase the internal pressure and even cause combustion. The use of polymer electrolytes can alleviate the above safety problems to a certain extent, but cannot fundamentally solve them. [0003] In recent years, foreign count...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0562
CPCY02E60/10
Inventor 徐华蕊俞兆喆朱归胜
Owner GUILIN UNIV OF ELECTRONIC TECH
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