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Lithium-air battery

An air battery and air electrode technology, applied in the direction of fuel cells, battery electrodes, battery pack components, etc., can solve the problems of limited coating amount, difficulty in fully improving discharge capacity, etc., and achieve the goal of improving discharge capacity and cycle life. Effect

Active Publication Date: 2017-08-01
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to sufficiently improve the discharge capacity only by the limited coating amount of the currently used conductive materials
In addition, the limited coating weight is difficult to fundamentally help to solve the overvoltage problem and improve the cycle life

Method used

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  • Lithium-air battery
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Experimental program
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Embodiment approach

[0057] Hereinafter, preferred examples and comparative examples are provided for better understanding of the present invention. However, these examples are only for illustrating the present invention, and the present invention is not limited thereto.

[0058] [Preparation of lithium-air battery]

Embodiment 1

[0059] (Example 1: Preparation of lithium-air battery)

[0060] On carbon paper at 0.412mg / cm 2 The amount of coated conductive material Super P to prepare the air electrode, and additionally on one side of the PE separator film at 0.626mg / cm 2 The amount of coated Super P to prepare the separator. Prepare lithium metal with a thickness of 150 μm as the negative electrode. 1.0M lithium salt LiN(CF 3 SO 2 ) 2 Add to ether solvent tetraethylene glycol dimethyl ether (TEGDME) to prepare electrolyte. Dip the separator in the electrolyte.

[0061] The air electrode, negative electrode, and separator impregnated in the electrolyte prepared as described above were introduced into a battery case in such a manner that the SuperP coating of the separator and the Super P coating of the air electrode faced each other to prepare a lithium-air battery.

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Abstract

The present invention provides a lithium-air battery comprising: a cathode which uses oxygen as a positive electrode active material; a negative electrode which is disposed apart from the positive electrode; and a separator which is immersed in an electrolyte disposed between the positive electrode and the negative electrode, wherein the cathode comprises a gas diffusion layer coated with a conductive material, and the separator has a part coated with the conductive material.

Description

technical field [0001] The present invention relates to a lithium-air battery, and more particularly, to a lithium-air battery whose discharge capacity is increased by increasing the amount of conductive material. Background technique [0002] The gravimetric energy density of lithium-air batteries is about 500 Wh / kg or more, which is much higher than that of current lithium-ion batteries (200 Wh / kg) or next-generation lithium-ion batteries (300 Wh / kg), and thus has already Much research has been done on it as a battery for an electric vehicle capable of long driving distance after a single charge. [0003] Lithium-air batteries have high energy density, but on the other hand exhibit such problems as high overvoltage during charging and such problems as short cycle life. In order to solve these problems, Korean Patent Application Publication No. 10-2013-0001170 discloses a technique using a positive electrode composed of carbon cloth, carbon paper or carbon felt each made o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M4/64H01M4/583H01M4/62H01M4/90H01M12/06H01M50/417H01M50/437H01M50/451H01M50/454
CPCH01M4/583H01M4/625H01M4/64H01M4/90H01M12/06H01M50/451H01M50/417H01M50/437H01M50/454H01M4/8605H01M4/8657H01M4/9075H01M4/925H01M12/08Y02E60/10Y02E60/50H01M50/46H01M4/8636H01M50/449H01M50/409H01M4/8673H01M2004/8689H01M2004/028
Inventor 赵恩京蔡宗铉梁斗景金有美朴奇秀李东旭
Owner LG ENERGY SOLUTION LTD