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Lithium-oxygen/air cell and preparation method thereof

An air battery and air electrode technology, which is applied to battery electrodes, fuel cell-type half-cells and secondary battery-type half-cells, circuits, etc. Secondary damage and other problems, to achieve the effect of good industrial value and commercial prospects, good operation stability and low cost

Active Publication Date: 2019-05-10
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of catalyst materials by this method is complicated, and the catalytic performance of the catalyst materials is not disclosed.
The most important thing is that after the positive electrode is modified by this method, it is necessary to disassemble the battery and take out the positive electrode sheet, which may cause secondary damage to the battery electrode, and reassembling the battery will also adversely affect the life and efficiency of the battery. The patented battery is still obtained by heterotopic assembly method

Method used

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  • Lithium-oxygen/air cell and preparation method thereof
  • Lithium-oxygen/air cell and preparation method thereof
  • Lithium-oxygen/air cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (S1), mix 10mg Ketjen Black with 110mg concentration of 1wt% polyvinylidene fluoride solution, the solvent of polyvinylidene fluoride solution is N-methylpyrrolidone, continue to add N-methylpyrrolidone solvent until the dispersion system is 1mL, ultrasonically dispersed until uniform, and evenly coated on the substrate, vacuum-dried at 110°C for 12h to obtain the original electrode material;

[0047] (S2), assemble the metal ion battery in an argon-filled glove box, using a CR2032 button battery case with holes on one side, the hole diameter is 2mm, and the hole density is 5 to 8 holes / cm 2 , the positive electrode is a lithium sheet, the negative electrode is the original electrode material prepared in (S1) step, the electrolyte solution is a tetraethylene glycol dimethyl ether solution of 1M bistrifluoromethanesulfonimide lithium, and the diaphragm is a glass fiber diaphragm. The original electrode material is placed on one side of the opening in the battery case, an...

Embodiment 2

[0051] (S1), mix 10mg of acetylene black with 80mg of 2wt% polytetrafluoroethylene solution, the solvent of the polytetrafluoroethylene solution is tetrahydrofuran, continue to add tetrahydrofuran until the dispersion is 1mL, and carry out ultrasonic dispersion until uniform and uniform coated on the substrate, and vacuum dried at 130°C for 10 hours to obtain the original electrode material;

[0052] (S2), assemble the metal ion battery in an argon-filled glove box, using a CR2032 button battery case with holes on one side, the hole diameter is 2mm, and the hole density is 5 to 8 holes / cm 2 , the positive electrode is a lithium sheet, and the negative electrode is the original electrode material prepared in (S1) step; the solute of the electrolyte solution is a tetraethylene glycol dimethyl ether solution of 1M lithium trifluoromethanesulfonate, and the diaphragm is a polyethylene diaphragm. The above-mentioned original electrode material is placed on one side of the opening i...

Embodiment 3

[0056] (S1), mix 10mg of super P with 140mg of polyvinyl alcohol solution with a concentration of 5wt%, the solvent of the polyvinyl alcohol solution is N-methylpyrrolidone, continue to add N-methylpyrrolidone until the dispersion is 1mL, and perform ultrasonication Disperse until uniform, and evenly coated on the substrate, 160 ℃ vacuum drying for 10h to obtain the original electrode material;

[0057] (S2), assemble the metal ion battery in an argon-filled glove box, using a CR2032 button battery case with holes on one side, the hole diameter is 2mm, and the hole density is 5 to 8 holes / cm 2 , the positive electrode is a lithium sheet, and the negative electrode is the original electrode material prepared in (S1) step; the solute of the electrolyte solution is ethylene glycol dimethyl ether solution of 1M lithium hexafluorophosphate lithium, and the diaphragm is a ceramic fiber diaphragm, and the original electrode material is placed in On one side of the opening in the batt...

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Abstract

The invention discloses a lithium-oxygen / air cell and a preparation method thereof. A positive electrode catalyst material MNx is used, wherein M is first main group metal, such as lithium, sodium orpotassium, N is carbon or silicon, and x is not more than 100 and more than 6. According to the preparation method, the common commercial materials are used as a basis, and the MNx material is synthesized in situ with the aid of a cell reaction to serve as a positive electrode catalyst, so that the overpotential during charging and discharging processes is effectively reduced, and the running stability of the cell is greatly improved. Furthermore, the lithium-oxygen / air cell provided by the invention adopts an in-situ assembly method, namely after the lithium embedding modification is performed on the original carbon electrode, the carbon electrode is directly used as the positive electrode of the metal-oxygen / air cell without re-assembly, so that the electrode plate is prevented from being secondarily damaged during disassembly, the electrolyte balance does not need to be re-built, the acquired cell power efficiency is higher, the running stability is better, and the good economic prospect and practical value are showed.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a lithium-oxygen / air battery and a preparation method thereof. Background technique [0002] With the rapid development of the economy, mobile and portable electronic devices, such as notebook computers, mobile phones and other products are becoming more and more popular. These mobile and portable devices have higher requirements for the energy density, stability and cost of the power supply. At the same time, the modern automobile industry has gradually developed towards clean energy pure electric vehicles, hybrid vehicles and other new energy vehicles. The necessary conditions for vehicle power supply are: high power, high energy density, high safety, and strong environmental adaptability. Traditional lead-acid batteries, nickel-cadmium batteries, nickel-hydrogen batteries, etc. have the problems of large mass and low specific energy (<50Wh / kg); fuel cells are not only costly, but ...

Claims

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Application Information

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IPC IPC(8): H01M12/08H01M4/90
CPCY02E60/10
Inventor 孙根班袁萌伟孙泽民李会峰
Owner BEIJING NORMAL UNIVERSITY
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