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Stibonium-doped quasi garnet-structured lithium ion crystalline-state solid electrolyte material and synthesis method thereof

A technology of solid electrolyte and synthesis method, which is applied in the field of lithium ion crystalline ceramic solid electrolyte material and its synthesis, can solve the problems of delaying the application process of lithium ion solid electrolyte, prolonging the process route, and low synthesis temperature, so as to increase lithium ion vacancies , Improve the conductivity and reduce the effect of sintering temperature

Inactive Publication Date: 2014-08-06
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Y.X.Gao et al synthesized Li by Sol-Gol method 5 La 3 Bi 2 o 12 , the synthesis temperature of the liquid phase method is relatively low and the time is short, but compared with the solid phase method, the process route is lengthened and the synthesis period is long
This complex process greatly delays the application process of this type of lithium-ion solid electrolyte

Method used

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  • Stibonium-doped quasi garnet-structured lithium ion crystalline-state solid electrolyte material and synthesis method thereof
  • Stibonium-doped quasi garnet-structured lithium ion crystalline-state solid electrolyte material and synthesis method thereof
  • Stibonium-doped quasi garnet-structured lithium ion crystalline-state solid electrolyte material and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Li 6.9 La 3 Zr 1.9 Sb 0.1 o 12 Preparation of raw material powder required for synthesis: lanthanum oxide (La 2 o 3 ) was baked at 900°C for 6 hours, lithium carbonate (Li 2 CO 3 ), zirconia (ZrO 2 ) and antimony trioxide (Sb 2 o 3 ) were dried at 120°C for 5 hours.

[0033] (2) Weighing and batching of raw material powder: the raw material powder that synthetic 5g needs to weigh is weighed respectively by the lanthanum oxide (La) prepared in the step (1) by stoichiometric ratio 2 o 3 99.99%) 2.9020g, lithium carbonate (Li 2 CO 3 98%) 1.5445g, Zirconia (ZrO 2 99.9%) 1.3915g and antimony trioxide (Sb 2 o 3 99%) 0.0874g, wherein lithium carbonate adds 10% more in order to compensate the lithium lost in high temperature. Mix the accurately weighed powder in an agate mortar, add 10ml of distilled water as an abrasive, mix and grind thoroughly to make the powder uniform.

[0034] (3) Li 6.9 La 3 Zr 1.9 Sb 0.1 o 12 Synthesis of the composite: the ra...

Embodiment 2

[0038] (1) Li 6.8 La 3 Zr 1.8 Sb 0.2 o 12 Preparation of raw material powder required for synthesis: lanthanum oxide (La 2 o 3 ) was baked at 900°C for 7 hours, lithium carbonate (Li 2 CO 3 ), zirconia (ZrO 2 ) and antimony trioxide (Sb 2 o 3 ) were dried at 120°C for 7 hours.

[0039] (2) Weighing and batching of raw material powder: the required weighing raw material powder of synthetic 7g is weighed respectively by the lanthanum oxide (La) prepared in step (1) by stoichiometric ratio 2 o 3 99.99%) 4.0515g, lithium carbonate (Li 2 CO 3 98%) 2.1250g, Zirconia (ZrO 2 99.9%) 1.8404g and antimony trioxide (Sb 2 o 3 99%) 0.2440, wherein lithium carbonate is added 10% more in order to compensate the lithium lost in high temperature. Mix the accurately weighed powder in an agate mortar, add 15ml of distilled water as an abrasive, mix and grind thoroughly to make the powder uniform.

[0040] (3) Li 6.8 La 3 Zr 1.8 Sb 0.2 o 12 Synthesis of the composite: the ra...

Embodiment 3

[0044] (1) Li 6.7 La 3 Zr 1.7 Sb 0.3 o 12 Preparation of raw material powder required for synthesis: lanthanum oxide (La 2 o 3 ) was calcined at 900°C for 9 hours, lithium carbonate (Li 2 CO 3 ), zirconia (ZrO 2 ) and antimony trioxide (Sb 2 o 3 ) were dried at 120° C. for 9 hours, respectively.

[0045] (2) Weighing and batching of raw material powder: the raw material powder that synthesizes 10g required weighing is weighed respectively by the lanthanum oxide (La) prepared in step (1) by stoichiometric ratio 2 o 3 99.99%) 5.8041g, lithium carbonate (Li 2 CO 3 98%) 2.9995g, Zirconia (ZrO 2 99.9%) 2.4901g and antimony trioxide (Sb 2 o 3 99%) 0.5245g, wherein lithium carbonate adds 10% more in order to compensate the lithium lost in high temperature. Mix the accurately weighed powder in an agate mortar, and add 20ml of absolute ethanol as a grinding agent, mix and grind thoroughly to make the powder uniform.

[0046] (3) Li 6.7 La 3 Zr 1.7 Sb 0.3 o 12 Syn...

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Abstract

The invention provides a novel quasi garnet-structured lithium ion conductor (Li7-xLa3Zr2-xSbxO12, wherein x is more than 0 and less than or equal to 0.5) crystalline-state ceramic solid electrolyte material and a synthesis method thereof, and belongs to the field of lithium ion batteries. A novel quasi garnet-structured lithium ion conductor is synthesized by conventional solid-phase reaction. X-ray diffraction (XRD) diffraction peaks of Sb-doped samples show that the Sb-doped samples all have crystalline -state cubic phase quasi garnet-structures in the Sb doped range. The maximum lithium ion conductivity can reach 3.42*10<-4>S / cm at room temperature (30 DEG C). The sample is synthesized by the conventional solid phase method, a preparation process is simple, and sintering time is short. Zr is partially replaced by high-valence Sb, so the lithium ion vacancy is increased, the ionic conductivity is improved obviously, and antimonous oxide is low in price compared with zirconia, so manufacturing cost is reduced. Therefore, the synthesized compact ceramic solid electrolyte material can be probably applied to a lithium ion battery.

Description

Technical field: [0001] The invention relates to a lithium ion crystalline ceramic solid electrolyte material and a synthesis method thereof, in particular to a lithium ion crystalline solid electrolyte material with an antimony-doped garnet-like structure and a synthesis method thereof. Background technique: [0002] In recent years, with the rapid development of portable devices such as personal computers and mobile phones, and more importantly, the urgent demand for future electric energy-driven locomotives, wind energy, and solar energy storage, the requirements for lithium-ion batteries as an energy storage device have increased significantly. However, current lithium-ion batteries commonly use organic solvents and other ionic liquid electrolyte materials. Although these electrolyte materials have high lithium ion conductivity, there are many safety hazards, such as electrolyte leakage, fire, and even explosion, which may endanger personal safety in severe cases. The f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/622
Inventor 曹珍珠任伟刘进荣高艳芳何伟艳董红英
Owner INNER MONGOLIA UNIV OF TECH
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