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Additive used for metal-air cell, room temperature liquid oxygen ion conductor electrolyte, and metal-air cell

A metal-air battery, metal-air technology, applied in the field of electrochemical energy storage, can solve the problems of electrode passivation hindering reaction, limited number of active reaction sites, and limiting the application of metal-air batteries, etc.

Active Publication Date: 2019-10-29
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When metal ions react with oxygen ions on the positive side of the air, there are a large number of side reactions that lead to low cycle performance and life of existing metal-air batteries, which limits the application of existing metal-air batteries in energy storage systems
Furthermore, the number of active reaction sites provided by the air cathode is limited, and the electrode passivation is prone to hinder the further generation of the reaction, resulting in the actual energy density of the existing metal-air batteries being far lower than its theoretical value.

Method used

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  • Additive used for metal-air cell, room temperature liquid oxygen ion conductor electrolyte, and metal-air cell
  • Additive used for metal-air cell, room temperature liquid oxygen ion conductor electrolyte, and metal-air cell
  • Additive used for metal-air cell, room temperature liquid oxygen ion conductor electrolyte, and metal-air cell

Examples

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Embodiment

[0072] Unless otherwise specified, the reagents in the examples of the present invention can be purchased through commercial channels.

[0073] Analysis method is as follows in the embodiment of the present invention:

[0074] The battery discharge test was performed using Neware battery testing system (Neware Co., China).

Embodiment approach

[0075] According to one embodiment of the present invention, the battery discharge test includes the following steps: standing still for 8 hours, performing a constant current discharge test with 2V as the discharge cut-off voltage and a current density of 100 mA / g (calculated based on the positive carbon load).

[0076] According to one embodiment of the present invention, a method for preparing a metal-air battery:

[0077] Gained electrolytic solution is dripped in the Whatman GF / D glass fiber diaphragm by the amount of 140 microliters, and pack CR2032 type button cell case together with air positive pole piece and a pair of metal negative pole pieces, put into protective atmosphere (N 2 -O 2 , 78:22, v / v) were assembled in a glove box, and a metal-air battery was obtained after standing for 8 hours.

Embodiment 1

[0078] Example 1 Lithium-air battery containing room temperature liquid oxygen ion conductor electrolyte 1

[0079] Under a dry atmosphere, use 1,2-(1,1,2,2-tetrafluoroethoxy)ethane as an ether solvent, and use N-methyl, propylpiperidine bistrifluoromethanesulfonimide Salt (PP13TFSI) is used as an ionic liquid salt, which is dissolved in an ether solvent to prepare an additive for a metal-air battery with an ionic liquid salt concentration of 0.1mol / L, as a liquid oxygen ion conductor electrolyte at room temperature.

[0080]The Ketjen black carbon loaded with nickel foam at 0.1 mg / cm2 is the air positive pole piece; the metal negative pole is lithium. A lithium-air battery 1 is obtained.

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Abstract

The invention discloses an additive used for a metal-air cell, a room temperature liquid oxygen ion conductor electrolyte, and the metal-air cell, wherein the additive used for the metal-air cell includes an ionic liquid salt and an ether solvent, and the concentration of the ionic liquid salt in the additive for the metal-air cell is greater than 0 mol / L. An electrolyte additive enables an electrolyte of the metal-air cell to achieve oxygen ion transmission at room temperature. The invention also provides the room temperature liquid oxygen ion conductor electrolyte including the additive usedfor the metal-air cell, and the metal-air cell prepared by the electrolyte.

Description

technical field [0001] The invention relates to an additive for a metal-air battery, a liquid oxygen ion conductor electrolyte at room temperature and a metal-air battery, belonging to the field of electrochemical energy storage. Background technique [0002] As a relatively mature energy storage technology in the market, lithium-ion batteries still cannot meet the needs of electronic equipment and daily life. Therefore, it is imminent to develop a new generation of energy storage technology with high energy density. Theoretical capacity density has received extensive attention. [0003] In existing metal-air batteries, depending on the metal negative electrode material used, a specific electrolyte is required to realize the transmission of metal ions in the metal negative electrode to the air positive electrode. Therefore, the electrolyte systems corresponding to specific metal negative electrodes are different. This increases the complexity of the metal-air battery system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/08H01M10/0569H01M10/0568H01M10/0567
CPCH01M10/0567H01M10/0568H01M10/0569H01M12/08H01M2300/0037Y02E60/10
Inventor 王德宇彭哲万浩刘子萱
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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