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Lithium-oxygen battery and preparation method thereof

A lithium-oxygen battery and lithium peroxide technology, applied in battery electrodes, circuits, fuel cell half-cells and secondary battery-type half-cells, etc.

Pending Publication Date: 2018-06-01
CHAOWEI POWER CO LTD
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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-oxygen battery with good cycle performance and high specific energy and its preparation method in view of the deficiencies of the prior art. It avoids the problems of carbon carrier and catalyst corrosion loss and large polarization of the oxygen electrode in the traditional lithium-oxygen battery or lithium-air battery, and is low in cost and easy to scale production

Method used

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Examples

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Embodiment 1

[0071] 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, keep the temperature at 1000ºC for 5min, cool naturally to room temperature, and cut off the protective gas to obtain the substrate . All the following operations were carried out in a nitrogen-protected glove box. The above substrates were vacuum impregnated in a 16% (mass ratio) lithium hydroxide aqueous solution at 100°C for 10...

Embodiment 2

[0074] 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 substrate. All the following operations were carried out in a nitrogen-protected glove box. The above substrate was vacuum impregnated in 5% (mass ratio) lithium hydroxide aqueous solution at 10°C for 30min (vacuum...

Embodiment 3

[0077] Take conductive agent 10g nickel powder and 1g silver powder, binder 0.25g styrene-butadiene rubber latex, 0.25g sodium hydroxypropyl methylcellulose and pore-forming agent 0.5g ammonium bicarbonate and put them into a ball mill jar together, add 10g deionized Water, at room temperature with a speed of 500 rpm ball milling for 60 minutes to obtain a slurry, which is coated on a 0.05mm thick punched nickel belt with a thickness of 0.2mm on one side, and dried at 100ºC 2h, to obtain the prefabricated substrate. The prefabricated substrate is rolled to about 0.3 mm (including the total thickness of the conductive skeleton) by a roller press to obtain the substrate. All subsequent operations were carried out in an argon-protected glove box. Take the above substrate, and vacuum impregnate the above substrate in 11% (mass ratio) lithium hydroxide water ethanol solution (the volume ratio of water and ethanol is 2:8, containing lithium nitrate accounting for 1% of the mass of ...

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Abstract

The invention relates to a lithium-oxygen battery and a preparation method thereof. The lithium-oxygen battery comprises a shell, a positive pole, a negative pole, a separator located between the positive pole and the negative pole, a positive terminal connected with the positive pole and led out of the shell as well as a negative terminal connected with the negative pole and led out of the shell,wherein the positive pole and the negative pole are arranged in the shell; the positive pole comprises a gas diffusion layer allowing oxygen to pass and a lithium peroxide loading layer which is located between the gas diffusion layer and the separator; the lithium-oxygen battery further comprises a gas chamber for storing oxygen, and the gas chamber is formed in the side, opposite to the side where the lithium peroxide loading layer is located, of the gas diffusion layer and communicated with the gas diffusion layer; the negative pole is a collector electrode formed by copper, a copper-zincalloy, nickel, a nickel-zinc alloy or a nickel-copper alloy; the lithium-oxygen battery further comprises an electrolyte filling space between the positive pole and the negative pole and in the separator. The lithium-oxygen battery is high in specific energy, high in charge-discharge cycle performance and low in cost, facilitates large scale production and has broad application prospect in the energy-storage aspects of electric tools, electric vehicles, power grids and the like.

Description

technical field [0001] The invention belongs to the field of electrochemical engineering and industrial devices, and in particular relates to a lithium-oxygen battery and a preparation method thereof in the field of battery production technology, which can construct a new type of lithium-oxygen battery for energy storage in electric tools, electric vehicles, power grids, etc. There are broad application prospects. 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 instabil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/08H01M4/90
CPCH01M4/90H01M12/08Y02E60/10
Inventor 程杰申亚举杨裕生
Owner CHAOWEI POWER CO LTD
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