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Preparation method of lithium-air battery based on lithium-ion solid electrolyte

A solid electrolyte and lithium-air battery technology, applied in the direction of fuel cell half-cells and primary battery-type half-cells, can solve the problems of large battery contact resistance, large battery polarization resistance, etc., and achieve excellent charge and discharge performance, Improved performance and good stability

Active Publication Date: 2018-03-20
ZHANGJIAGANG INST OF IND TECH SOOCHOW UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Their conductivity and sintering performance can be improved by doping; however, current research on garnet-type or perovskite-type lithium-ion solid-state electrolytes mainly focuses on material preparation, basic performance improvement, and lithium-ion transfer mechanisms. Making all-solid-state lithium-air battery devices has not been reported yet
In addition, the existing solid-state lithium-air batteries are all button-type, and the physical contact between the lithium metal anode, the air electrode and the solid-state electrolyte is purely achieved by extrusion. The battery assembled in this way has a large contact resistance, and the battery During the reaction, lithium ions and oxygen negative ions are only transferred at the layer-to-layer contact surface, and the battery polarization resistance is also relatively large.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Accurately weigh 4.1g Li 7 La 3 Zr 2 o 12 , 0.08g tetraethyl orthosilicate, 0.1g triethanolamine, 0.11g dibutyl phthalate, 0.12 polyethylene glycol, and 10g ethanol were placed in an agate ball mill jar, and ball milled for 4 hours to obtain a uniform impregnation slurry; accurately weighed Quantity 5 g Li 7 La 3 Zr 2 o 12 and 2.5 g of ethyl cellulose, and then add 3.5 g of 1,5-dimethyl-2-pyrrolidone in an agate ball mill jar, mill for 4 hours to obtain a uniform viscous slurry, transfer the slurry to a test tube, and use a diameter A glass rod about 0.3 cm in size is impregnated with the slurry, pulled out, and rotated at a constant speed. After the thickness is uniform, it is quickly soaked in absolute ethanol, and a phase inversion process occurs. After soaking for 20 minutes, the glass rod is taken out to obtain a closed end. The tubular green body was finally sintered at 1050°C for 12 h at a heating rate of 1°C / min to obtain a tubular skeleton with a length ...

Embodiment 2

[0029] Accurately weigh 3.4g Li 6.4 La 3 Zr 1.4 Ta 0.4 o 12 , 0.08g tetraethyl orthosilicate, 0.1g triethanolamine, 0.11g dibutyl phthalate, 0.12 polyethylene glycol, and 10g ethanol were placed in an agate ball mill jar, and ball milled for 4 hours to obtain a uniform impregnation slurry; accurately weighed Quantity 5 g Li 7 La 3 Zr 2 o 12 and 2.5 g of ethyl cellulose, and then add 3.5 g of 1,5-dimethyl-2-pyrrolidone in an agate ball mill jar, mill for 4 hours to obtain a uniform viscous slurry, transfer the slurry to a test tube, and use a diameter A glass rod of about 0.3 cm is impregnated with the slurry, pulled out, and rotated at a constant speed. After the thickness is uniform, it is quickly soaked in anhydrous alcohol, and a phase inversion process occurs. After soaking for 20 minutes, the glass rod is taken out to obtain a closed end. The tubular green body was finally sintered at 1050°C for 12 h at a heating rate of 1°C / min to obtain a tubular skeleton with a...

Embodiment 3

[0034] Accurately weigh 3.8g Li 3x La 2 / 3-x □ 1 / 3-2x TiO 3 (x=0.09), 0.08g tetraethyl orthosilicate, 0.1g triethanolamine, 0.11g dibutyl phthalate and 0.12 polyethylene glycol, 10g ethanol are placed in an agate ball mill jar, and ball milled for 4 hours to obtain uniform impregnation Slurry; accurately weigh 5 g Li 3x La 2 / 3-x □ 1 / 3-2x TiO 3 and 2.5 g of ethyl cellulose, and then add 3.5 g of 1,5-dimethyl-2-pyrrolidone in an agate ball mill jar, mill for 4 hours to obtain a uniform viscous slurry, transfer the slurry to a test tube, and use a diameter A glass rod about 0.6 cm in size is impregnated with the slurry, pulled out, and rotated at a constant speed. After the thickness is uniform, it is quickly soaked in n-propanol to undergo a phase inversion process. After soaking for 20 minutes, the glass rod is taken out to obtain a closed end. The tubular green body was finally sintered at 1150°C for 24 h at a heating rate of 1°C / min to obtain a tubular skeleton with a l...

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Abstract

The invention discloses a preparation method of a lithium air battery based on lithium ion solid electrolyte. The preparation method comprises the following steps of: preparing an electrolyte skeleton, preparing an air electrode, preparing a metal electrode and preparing a battery lead. An obtained all-solid-state lithium air battery adopts a garnet or perovskite lithium ion solid electrolyte material to prepare a porous supporting body, and a battery reaction three-phase interface is enlarged in permeation pores of an air electrode catalyst and a lithium metal anode, so that the battery polarization resistance is decreased, a lithium ion transmission route is shortened, and the battery ohmic resistance is reduced; the battery is of a tubular structure with a closed end, the lithium metal anode is poured into a tube, and the battery is simple to seal and easy to operate under different conditions; and the preparation method has the advantages of high charge and discharge capacity, good multiplying power performance, high cycling stability and wide operation temperature range and is suitable for the fields of various mobile electronic devices and power batteries.

Description

technical field [0001] The invention relates to a lithium-air battery, in particular to a preparation method of a lithium-air battery based on a lithium-ion solid electrolyte, and belongs to the field of high-performance chemical power sources. Background technique [0002] At present, the main source of power for small and medium-sized cars is the combustion of diesel and gasoline. However, with the depletion of oil resources and the deterioration of environmental problems, people urgently need to find a green energy alternative. Among the many green energy alternatives at present, lithium-ion batteries have rapidly replaced lead-acid, nickel-cadmium, and nickel-metal hydride in recent years due to their relatively high energy density, good rate performance, cycle stability, and no memory effect. Batteries have become the most popular high-energy power batteries in the electric vehicle market. [0003] A lithium-air battery is a battery that uses oxygen as the positive ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M12/06
CPCH01M12/06
Inventor 金超杨瑞枝王章俊罗勇
Owner ZHANGJIAGANG INST OF IND TECH SOOCHOW UNIV
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