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a crystalline state 3 ocl inorganic lithium ion conductor and its preparation method and application

An ionic conductor, inorganic lithium technology, applied in lithium halide, electrolyte immobilization/gelation, electrical components, etc., can solve the problem of poor controllability of material morphology and electrochemical performance, harsh synthesis equipment and process conditions, etc. problems, to achieve the effect of improving lithium ion conductivity, controlling product morphology, and good air stability

Active Publication Date: 2020-09-11
CHANGSHA STORM ENERGY TTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, Li 3 The synthesis methods of OCl inorganic electrolyte mainly include hydrothermal method, high-pressure solid-phase method, etc. The synthesis equipment and process conditions are relatively harsh, and the controllability of material morphology and electrochemical performance is not good.

Method used

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  • a crystalline state <sub>3</sub> ocl inorganic lithium ion conductor and its preparation method and application
  • a crystalline state <sub>3</sub> ocl inorganic lithium ion conductor and its preparation method and application
  • a crystalline state <sub>3</sub> ocl inorganic lithium ion conductor and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Lithium hydroxide, lithium oxide and lithium chloride were prepared in a molar ratio (1.8 : 0.1 :1), ball milled to mix the three compounds evenly, and the mixture was placed in a vacuum tube furnace at a rate of 2°C / min to 300 ℃, and kept at 300℃ for 5h to obtain a molten precursor; uniformly disperse 0.2 mole of metal zinc powder in the molten precursor, and raise the temperature to 400℃ for 20h; then o Cool down to room temperature at a cooling rate of C / min. The resulting product is pulverized with a ball mill to obtain Zn-doped Li with a particle size distribution between 150-325 mesh. 3 OCl electrolyte material.

[0027] figure 1 Pure phase Li 3 OCl and embodiment 1 gained Zn-doped Li 3 The XRD collection of OCl; Whether can be seen in present embodiment 1 gained Zn-doped Li 3 OCl is crystalline

[0028] figure 2 For the obtained Zn doped Li of embodiment 1 3 The microscopic morphology of OCl, as can be seen from the figure, the resulting Zn-doped Li 3 ...

Embodiment 2

[0031] Lithium hydroxide, lithium oxide and lithium chloride were prepared in a molar ratio (1.8 : 0.1 :1), ball milled to mix the three compounds evenly, and the mixture was placed in a vacuum tube furnace at a rate of 2°C / min to 300 ℃, and held at 300°C for 5 hours to obtain a molten precursor; 0.05 mole metal zinc powder was uniformly dispersed in the molten precursor, and the temperature was raised to 400°C for 20 hours; o Cool down to room temperature at a cooling rate of C / min. The resulting product is pulverized with a ball mill to obtain Zn-doped Li with a particle size distribution between 150-325 mesh. 3 OCl electrolyte material. According to the above method, a symmetrical battery was prepared and the electrochemical performance was tested. The results showed that: 0.05 moles of Zn doped Li 3 The room temperature ionic conductivity of OCl is 0.95×10 -3 S / cm.

Embodiment 3

[0033] Lithium hydroxide, lithium oxide and lithium chloride were prepared in a molar ratio (1.8 : 0.1 :1), ball milled to mix the three compounds evenly, and the mixture was placed in a vacuum tube furnace at a rate of 2°C / min to 300 ℃, and held at 300°C for 5 hours to obtain a molten precursor; 0.1 mole metal zinc powder was uniformly dispersed in the molten precursor, and the temperature was raised to 400°C for 20 hours; o Cool down to room temperature at a cooling rate of C / min. The resulting product is pulverized with a ball mill to obtain Zn-doped Li with a particle size distribution between 150-325 mesh. 3 OCl electrolyte material. According to the above method, a symmetrical battery was prepared and the electrochemical performance was tested. The results showed that: 0.1 mole Zn doped Li 3 The room temperature ionic conductivity of OCl is 1.0×10 -3 S / cm.

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Abstract

The invention discloses a crystalline Li 3 OCl inorganic lithium ion conductor and its preparation method and application; The Li 3 OCl inorganic Li-ion conductor is Zn-doped Li 3 OCl, the preparation method is as follows: mix lithium hydroxide, lithium oxide and lithium chloride in proportion, and melt them above the eutectic point of the three to obtain a precursor; Zn-doped Li 3 OCl. Li provided by the present invention 3 OCl inorganic lithium ion conductor has excellent lithium ion conductivity and environmental stability. The preparation method provided by the invention has short preparation period, low cost and high process controllability, and is suitable for industrial application.

Description

technical field [0001] The present invention relates to a kind of crystalline Li 3 The invention discloses an OCl inorganic lithium ion conductor and a preparation method and application thereof, belonging to the technical field of solid electrolyte preparation. Background technique [0002] Due to its technical advantages such as high operating voltage, high energy density, high energy efficiency, low self-discharge rate, long cycle life, and no memory effect, lithium-ion batteries are the battery devices with the best overall performance so far. However, the organic electrolytes used in lithium-ion batteries currently on the market have safety issues such as leakage, electrode corrosion, and even oxidative combustion. Lithium ion inorganic solid electrolyte can well avoid the above problems, and has high lithium ion conductivity (up to 10 -2 S / cm), good chemical stability, and large potential window (5-10 V), it is very promising to develop a new type of lithium-ion bat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0525
CPCC01D15/04C01P2002/54C01P2002/72C01P2004/01C01P2006/40H01M10/0525H01M10/0562H01M2300/0085Y02E60/10
Inventor 刘清虎
Owner CHANGSHA STORM ENERGY TTECH
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