Fabrication method of lithium-air battery and lithium-air battery

A lithium-air battery, battery cathode technology, applied in battery electrodes, fuel cell-type half-cells and secondary battery-type half-cells, circuits, etc. problem, to avoid low efficiency and achieve the effect of excellent performance

Active Publication Date: 2019-03-05
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Silicon material has a theoretical specific capacity as high as 4200mAh / g, and has a lower charge-discharge platform compared to lithium. However, if it is to be used in lithium-air batteries, it must first react with lithium to form an alloy. Li-silicon alloys have active chemical properties and can be prepared Electrodes are difficult and unstable
Therefore, there are still great challenges in applying silicon-based anode materials to lithium-air batteries.

Method used

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  • Fabrication method of lithium-air battery and lithium-air battery
  • Fabrication method of lithium-air battery and lithium-air battery
  • Fabrication method of lithium-air battery and lithium-air battery

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Using nano-silicon material as the negative electrode and carbon nanotubes as the positive electrode catalyst, the steps of a metal-free lithium-air battery manufacturing method are as follows:

[0040] (1) Mixing nano-silica powder, conductive agent, and binder to prepare a slurry, coating it on copper foil, and drying it in vacuum to obtain the negative electrode part of the battery;

[0041] (2) In an anhydrous and oxygen-free environment, fully mix lithium nitride, carbon nanotubes, a conductive agent, and a binder, and take the mixture and press it on the nickel foam to form the positive part;

[0042] (3) In an anhydrous and oxygen-free environment, sequentially package the positive electrode, separator, and negative electrode prepared above, and add electrolyte solution dropwise.

[0043] So far, the lithium-air battery without metal lithium has been fabricated.

[0044] The charge-discharge curve of the metal-free lithium-air battery prepared in this example is...

Embodiment 2

[0046] Using nano-silicon material as the negative electrode, and the carbon-supported Ru catalyst as the positive electrode catalyst, the steps of a metal-free lithium-air battery manufacturing method are as follows:

[0047] (1) Mixing nano-silica powder, conductive agent, and binder to prepare a slurry, coating it on copper foil, and drying it in vacuum to obtain the negative electrode part of the battery;

[0048] (2) In an anhydrous and oxygen-free environment, fully mix lithium nitride, carbon-supported Ru catalyst, conductive agent, and binder, and take the mixture and press it on the foamed nickel to form the positive part;

[0049] (3) In an anhydrous and oxygen-free environment, sequentially package the positive electrode, separator, and negative electrode prepared above, and add electrolyte solution dropwise.

[0050] So far, the lithium-air battery without metal lithium has been fabricated.

Embodiment 3

[0052] A silicon oxide material is used as the negative electrode, and carbon nanotubes are used as the positive electrode catalyst. The steps of a metal-free lithium-air battery manufacturing method are as follows:

[0053] (1) Prepare a slurry by mixing silicon oxide, a conductive agent, and a binder, apply it on a copper foil, and dry it in a vacuum to obtain the negative electrode part of the battery;

[0054] (2) In an anhydrous and oxygen-free environment, fully mix lithium nitride, carbon nanotubes, a conductive agent, and a binder, and take the mixture and press it on the nickel foam to form the positive part;

[0055] (3) In an anhydrous and oxygen-free environment, sequentially package the positive electrode, separator, and negative electrode prepared above, and add electrolyte solution dropwise.

[0056] So far, the lithium-air battery without metal lithium has been fabricated.

[0057] The charge-discharge curve of the metal-free lithium-air battery prepared in th...

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Abstract

The invention provides a fabrication method of a lithium-air battery without metal lithium. The fabrication method comprises the steps of (1) mixing and coating a silicon-based negative electrode material, a conductive agent and a binding agent on a negative current collector; (2) mixing and laminating a catalyst, the conductive agent, the binding agent and lithium nitride on a positive current collector in an anhydrous and oxygen-free environment; and (3) separating a positive electrode and a negative electrode by a separator in the anhydrous and oxygen-free environment, dropwise adding an electrolyte, and assembling the lithium-air battery. The lithium nitride is used as a lithium source, a silicon-based material is used as a negative electrode, a lithium-silicon alloy negative electrodeis formed during charging at initial circle, the metal lithium is substituted, lithium dendrites are prevented from being generated, and moreover, an electrical product lithium peroxide can be effectively stored in vacancies generated by the decomposition of the lithium nitride.

Description

technical field [0001] The invention relates to a preparation method of a lithium-air battery, belonging to the technical field of fuel cells. Background technique [0002] With the increasing urgency of energy demand in modern society, secondary batteries with high energy density have become the focus of future energy industry development. Lithium-ion batteries have become the most commonly used secondary batteries due to their outstanding performance advantages. However, the negative electrode material commonly used in existing lithium-ion batteries is graphitized carbon, and its theoretical specific capacity is 370mAh / g. The positive electrode material is lithium iron phosphate, lithium cobaltate, lithium manganate, and ternary materials. Meet the needs of modern society. In particular, the rapid development of electric vehicles has put forward higher requirements for the development of high specific energy lithium-ion batteries. The high specific energy advantage of me...

Claims

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Application Information

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IPC IPC(8): H01M12/08H01M4/38H01M4/48
CPCH01M4/386H01M4/483H01M12/08Y02E60/10
Inventor 杨军张涛王久林努丽燕娜
Owner SHANGHAI JIAO TONG UNIV
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