Lithium peroxide electrode and preparation method and application thereof

A technology of lithium peroxide and lithium hydroxide, applied to battery electrodes, fuel cell half-cells, secondary battery-type half-cells, circuits, etc., to avoid sudden failure, improve electronic conductivity, and improve cycle life Effect

Inactive Publication Date: 2018-06-01
ZHANGJIAGANG SMARTGRID FANGHUA ELECTRICAL ENERGY STORAGE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is to provide a lithium peroxide electrode capable of improving the cycle life of the battery and the specific energy of the battery and its preparation method and application for the deficiencies in the prior art. The preparation method of the lithium peroxide electrode has a process The characteristics of simplicity, low cost, and less pollution avoid the problems of carbon support and catalyst corrosion loss and large polarization of the oxygen electrode in traditional lithium-oxygen batteries or lithium-air batteries. At the same time, it is low in cost and easy to scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Take 10g of nickel carbonyl powder as conductive agent, 0.1g of sodium carboxymethylcellulose (CMC) as binder, and 0.5g of polyvinyl butyral as pore-forming agent and put them into a ball mill jar together, add 10g of deionized water, and Ball mill at a speed of 500 rpm for 60 minutes to obtain a slurry, which is coated on a 0.05 mm thick nickel-plated punched steel strip with a thickness of 0.4 mm on one side, and dried at 100°C for 6 hours to obtain Prefabricated substrates. Put the prefabricated substrate into a tube furnace, use high-purity nitrogen as the protective gas (linear flow rate 5cm / min), heat up to 1000ºC at a rate of 5ºC / min, sinter at a constant temperature of 1000ºC for 5min, cool naturally to room temperature, and cut off the protective gas. obtained substrate.

Embodiment 2

[0050] Take 10g of nickel carbonyl powder as conductive agent, 0.1g of sodium carboxymethylcellulose (CMC) as binder, and 0.5g of polyvinyl butyral as pore-forming agent and put them into a ball mill jar together, add 10g of deionized water, and Ball milling at a speed of 500 rpm for 60 min to obtain a slurry. The slurry was coated on a 0.02 mm thick punched nickel strip with a coating thickness of 0.08 mm on one side, and dried at 100°C for 6 hours to obtain a prefabricated substrate. Put the prefabricated substrate into a tube furnace, use high-purity ammonia as the protective gas (linear flow rate 5cm / min), heat up to 800ºC at a rate of 5ºC / min, keep the temperature at 800ºC for 30min, cool naturally to room temperature, and cut off the protective gas to obtain the substrate.

Embodiment 3

[0052] All operations were performed in a nitrogen-protected glove box. Take the substrate in Example 1, vacuum immerse the above substrate in a 16% (mass ratio) lithium hydroxide aqueous solution at 100°C for 10min (vacuum degree not greater than 20mm Hg); take it out and dry the surface water with hot air (80°C) trace. Vacuum-immerse the substrate impregnated with lithium hydroxide above in 35% (mass ratio) hydrogen peroxide aqueous solution at 50°C for 10 minutes (vacuum degree not greater than 20 mm Hg); take it out and dry the surface with hot air (80°C). Lithium hydroxide impregnated in the pores of sintered nickel reacts with hydrogen peroxide to generate hydrated lithium peroxide and deposits in the pores of sintered nickel. Repeat the step of impregnating lithium hydroxide and the step of impregnating hydrogen peroxide until the loading amount of active material in the above substrate reaches the requirement (theoretical specific capacity reaches 100mAh / cm 2 about)....

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Abstract

The invention relates to a lithium peroxide electrode and a preparation method and an application thereof. The lithium peroxide electrode comprises a substrate and lithium peroxide deposited in the substrate; the substrate comprises a conductive framework and a porous layer formed on the conductive framework; and the conductive framework is made of a metal material. The preparation method of the lithium peroxide electrode disclosed in the invention has the characteristics of simple process, low cost and less pollution, and the problems of corrosion loss, high polarization and the like of an oxygen electrode carbon carrier and a catalyst in the conventional lithium oxide battery or a lithium air battery can be avoided; and meanwhile, the lithium peroxide electrode is low in cost and large-scale production can be realized easily.

Description

technical field [0001] The invention belongs to the field of electrochemical engineering and industrial devices, in particular to a lithium peroxide electrode in the field of battery production technology and a preparation method thereof, which can be used as a positive electrode in a lithium-oxygen battery or a lithium-air battery system. Background technique [0002] Modern society has a huge demand for mineral energy such as coal and oil, which has caused the greenhouse effect and increasingly serious air and ecological environment pollution, posing a serious threat to the earth on which we live. Vigorously developing renewable energy such as wind energy and solar energy is an important way to achieve sustainable energy development in my country. However, renewable energy power generation has time difference and instability, and large-scale power storage technology is needed to solve the instability problem of renewable energy. [0003] Chemical battery is an important m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/08H01M4/86H01M4/88
CPCH01M4/8605H01M4/8657H01M4/8673H01M4/8828H01M4/8878H01M12/08Y02E60/10
Inventor 程杰申亚举杨裕生
Owner ZHANGJIAGANG SMARTGRID FANGHUA ELECTRICAL ENERGY STORAGE RES INST
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