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Positive electrode for lithium air battery and lithium air battery comprising same

An air battery, gas diffusion electrode technology, applied in the direction of fuel cell type half cell and primary cell type half cell, fuel cell type half cell and secondary cell type half cell, battery electrode, etc., can solve the problem of reducing Charge/discharge efficiency and other issues to achieve the effect of improving charge/discharge efficiency, improving electronic conductivity, and improving service life characteristics

Inactive Publication Date: 2016-08-17
IUCF HYU (IND UNIV COOP FOUND HANYANG UNIV)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, the problem arises that the carbon and discharge intermediate Li 2 O reaction, will reduce charge / discharge efficiency

Method used

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  • Positive electrode for lithium air battery and lithium air battery comprising same
  • Positive electrode for lithium air battery and lithium air battery comprising same
  • Positive electrode for lithium air battery and lithium air battery comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Carbon black (super P), which is a conductive material, is mixed with polyvinylidene fluoride (PVDF) at a weight ratio of 80:20 and dispersed in N-methyl-2-pyrrolidone to prepare the positive electrode active material layer composition. The composition for the positive electrode active material layer was coated on carbon paper (TGP-H-030, Toray Industries, Inc.) as a gas diffusion electrode and then dried to prepare an electrode.

[0024] Cobalt solution is made by adding 40g cobalt dichloride (CoCl 2 ) was added to 240ml of water for preparation. The fabricated electrode was dipped in a cobalt solution, and then cobalt was deposited thereon by applying a voltage of 4 V for 10 minutes to prepare a positive electrode. Lithium metal foil was used as the negative electrode.

[0025] Oxygen permeation is easy by forming holes on the positive electrode of this making, and using this negative electrode and porous glass filter (Whatman TM ) made into a coin cell type lithi...

Embodiment 2

[0027] A lithium-air battery was fabricated in the same manner as in Example 1, except that the positive electrode was fabricated by applying a voltage of 3 V for 3 minutes to deposit cobalt.

Embodiment 3

[0029] A lithium-air battery was fabricated in the same manner as in Example 1, except that by using silver nitrate (AgNO 3 ) to prepare a silver solution, and then deposit silver metal to make the positive electrode.

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Abstract

The present invention relates to a positive electrode for a lithium air battery and a lithium air battery comprising the same and, more specifically, to a positive electrode for a lithium air battery, the positive electrode containing oxygen as a positive electrode active material and comprising a gas diffusion electrode including a transition metal deposition layer formed on a surface; and to a lithium air battery comprising the same.

Description

【Technical field】 [0001] The invention relates to a positive pole of a lithium-air battery and a lithium-air battery containing the positive pole. 【Background technique】 [0002] Lithium secondary batteries are currently gaining attention as next-generation batteries, but electric vehicles equipped with lithium secondary batteries are inconvenient because their driving distance per charge is too short to compete with cars run by engines . [0003] In order to solve the above-mentioned problems of lithium batteries, lithium-air batteries have recently been actively studied. Li-air batteries have a theoretical energy density of 3000 Wh / kg or higher, equivalent to about 10 times the energy density of lithium-ion batteries. Moreover, lithium-air batteries are environmentally friendly and have higher safety than lithium-ion batteries. [0004] Generally, in a lithium-air battery, air is used as a positive electrode active material, and lithium metal having a potential differen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/133H01M12/06
CPCH01M4/86H01M4/926H01M12/08Y02E60/10Y02E60/50H01M4/02H01M12/06H01M4/133H01M50/44H01M4/134H01M4/382H01M4/8605H01M4/8807H01M4/8853H01M4/9041H01M8/02H01M10/0525H01M10/0568H01M10/0569H01M2004/027H01M2004/8689
Inventor 宣良国朴晋范
Owner IUCF HYU (IND UNIV COOP FOUND HANYANG UNIV)
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