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Lithium-air battery

A lithium-air battery, electronic technology, applied in battery electrodes, fuel cell components, circuits, etc., can solve safety problems, cathode degradation, reduce air battery charge and discharge characteristics and other problems, to improve battery performance, avoid electrolytes No deterioration in volatilization and charge-discharge characteristics

Inactive Publication Date: 2014-03-12
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

[0007] Existing air batteries of this type use organic solvents as electrolytes, but such organic solvents are volatile and mix with water, so there is a safety problem when used for a long time
And, in the process of supplying air to the anode, the anode is degraded by the moisture, carbon dioxide, etc. contained in the air, and the moisture, carbon dioxide, etc. in the air are transferred to the cathode through the organic electrolyte and interact with the Lithium reacts to degrade the cathode, and as a result, there is a problem that the charge-discharge characteristics of the air battery are lowered

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] TGP-H-30 carbon paper from Torray Co. was used as the anode, and the electronically conductive substance in Table 1 below was used as the electronically conductive substance for coating. Mix 80 parts by weight of electronically conductive material with 20 parts by weight of binder PVDF to prepare slurry, with 1.0±0.1mg carbon / cm 2 The density is coated on the TGP-H-30 carbon paper of the TORRAY company. Thereafter, in order to remove the residual solvent, it was vacuum-dried at 100° C. for 12 hours.

[0047] [Table 1]

[0048]

electronically conductive substance

Example 1-1

Super P

Example 1-2

Vulcano Carbon

Example 1-3

CMK

Example 1-4

CNT

Example 1-5

Graphene oxide

Examples 1-6

Acetylene black

Examples 1-7

Ketjen Black

[0049] The gas diffusion layer (GDL) coated with electronically conductive material prepared above was used as the air electrode, lithium metal was use...

Embodiment 2

[0053] TGP-H-30 carbon paper from Torray Company was used as the anode, and super P was used as the electronically conductive material, and the coating was performed under the same conditions as in Example 1 above.

[0054] The above prepared gas diffusion layer (GDL) coated with electronically conductive material was used as the air electrode, metal lithium was used as the cathode, the electrolyte in the following list 2 was used as the electrolyte, and a porous polyethylene film was used as the separator (Celgard, LLC., Celgard3501), made of 2032 coin-type batteries.

[0055] [Table 2]

[0056]

[0057] At the temperature shown in the above table 2, the charge and discharge capacity of the lithium-air batteries prepared in the above examples 2-1 to 2-4 were measured, and the results are shown in Figure 9 to Figure 17 .

[0058] Depend on Figure 9 to Figure 17 It can be seen that when TEGDME is used as the electrolyte, the charge voltage is 4.0V, and the discharge vol...

Embodiment 3

[0060] Use the TGP-H-30 carbon paper of Torray Company as anode, use super P as electronic conductivity material, the super P of 80 weight parts is mixed with the adhesive agent of 20 weight parts shown in following table 3, implement with above-mentioned Example 1 Preparation of anode and air electrode.

[0061] [table 3]

[0062] differentiate

Electrolyte used

Example 3-1

PVdF

Example 3-2

PEOs

Example 3-3

Kynar

[0063] The charge-discharge capacity of the lithium-air battery prepared in the above-mentioned examples 3-1 to 3-3 is measured, and the results are shown in Figure 18 to Figure 20 .

[0064] Depend on Figure 18 to Figure 20 It can be seen that the charge voltage is similar to the discharge voltage, although it differs depending on the type of binder.

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Abstract

The present invention relates to a lithium-air battery, and more particularly, to a lithium-air battery which comprises a gas diffusion positive electrode formed in a portion thereof contacting air, and which employs a low-volatility electrolyte, thus exhibiting the effect of preventing volatilization of the electrolyte, thereby enabling the battery to be used over a long period of time without safety problems and without degradation of the charging / discharging characteristics of the battery, and the effect of air flowing into the battery being provided in a quicker and more uniform manner while passing through the gas diffusion positive electrode, thus improving the performance of the battery.

Description

technical field [0001] The invention relates to a lithium-air battery. Background technique [0002] The report shows that a lithium-air battery that uses oxygen in the air as the positive electrode active material continuously receives oxygen from the outside of the battery, and the battery can be filled with a large amount of metal lithium as the cathode active material, so it has a considerable discharge capacity. [0003] figure 1 The basic structure of this Li-air battery is shown. Such as figure 1 As shown, the structure of the lithium-air battery is to use a carbon gas diffusion oxygen electrode as the anode 10 , use metal lithium or a lithium compound as the cathode 20 , and arrange an organic electrolyte 30 between the anode 10 and the cathode 20 . [0004] In this lithium-air battery, metallic lithium (Li) of the cathode 20 is dissolved in the organic electrolyte 30 and becomes lithium ions (Li + +e - ) and reach the anode 10, and with the oxygen O in the air ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/06
CPCH01M4/96H01M4/8668H01M2300/0028H01M4/382H01M4/661H01M12/08Y02E60/50H01M12/06Y02E60/128Y02E60/10H01M4/88H01M8/02
Inventor 宣良国郑燻基
Owner IUCF HYU (IND UNIV COOP FOUND HANYANG UNIV)
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