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Novel three-dimensional electrode material for lithium air battery and preparation method for novel three-dimensional electrode material

A lithium-air battery and three-dimensional electrode technology, applied in battery electrodes, nanotechnology for materials and surface science, circuits, etc., can solve problems such as energy loss, porosity reduction, oxygen channel blockage, etc., to save the preparation process Effect

Inactive Publication Date: 2016-03-30
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, lithium oxide, the discharge product of non-aqueous lithium-air batteries, is insoluble in organic solvents and can only be deposited on the surface of the cathode, which is likely to cause problems such as blockage of oxygen channels and forced termination of discharge. At present, the preparation of lithium-air electrode materials mostly adopts traditional methods. In the beating coating method, the use of the binder makes the surface active substances agglomerate in a large area, the porosity is greatly reduced, the oxygen channel is reduced, and the binder itself is not conductive, so that the charge cannot effectively reach the reaction interface and the energy is lost.

Method used

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  • Novel three-dimensional electrode material for lithium air battery and preparation method for novel three-dimensional electrode material
  • Novel three-dimensional electrode material for lithium air battery and preparation method for novel three-dimensional electrode material
  • Novel three-dimensional electrode material for lithium air battery and preparation method for novel three-dimensional electrode material

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Embodiment 1

[0027] A piece of carbon paper with a size of 2*5cm and a mass of 44.6mg was anodized in dilute sulfuric acid for 3 minutes, in which the carbon paper was used as the anode and the titanium plate was used as the cathode, washed with deionized water, dried and put into NiCl 2 ·6H 2 Soak in ethanol solution of O for 5min, take it out and dry it at 80°C to get NiCl 2 / CFP.

[0028] NiCl obtained above 2 / CFP is placed in a quartz reactor, and the temperature is raised at a heating rate of 10K / min. During the heating process, argon gas is introduced at a rate of 100mL / min as a protective gas, and ethylene is used as a carbon source. Argon, the rate of feeding is 200mL / min, after 20min, change to the mixed gas of hydrogen and argon, where hydrogen: argon = 8:5, the rate of passing the mixed gas is 130mL / min, after 40min in the argon atmosphere cooling down to room temperature naturally to obtain a multi-walled carbon nanotube / carbon paper three-dimensional composite material, th...

Embodiment 2

[0031] A piece of carbon paper with a size of 2*5cm and a mass of 45.5mg was anodized in dilute sulfuric acid for 3 minutes, in which the carbon paper was used as the anode and the titanium plate was used as the cathode, washed with deionized water, dried and put into NiCl 2 ·6H 2 Soak in ethanol solution of O for 5min, take it out and dry it at 80°C to get NiCl 2 / CFP.

[0032] NiCl obtained above 2 / CFP is placed in a quartz reactor, and the temperature is raised at a heating rate of 10K / min. During the heating process, argon gas is introduced at a rate of 100mL / min as a protective gas, and ethylene is used as a carbon source. Argon, the rate of feeding is 200mL / min, after 20min, change to the mixed gas of hydrogen and argon, where hydrogen: argon = 8:5, the rate of passing the mixed gas is 130mL / min, after 40min in the argon atmosphere Naturally cooling to room temperature, the multi-walled carbon nanotube / carbon paper three-dimensional composite material is obtained, an...

Embodiment 3

[0035] A piece of carbon paper with a size of 2*5cm and a mass of 45.3mg was anodized in dilute sulfuric acid for 3 minutes, in which the carbon paper was used as the anode and the titanium plate was used as the cathode, washed with deionized water, dried and put into NiCl 2 ·6H 2 Soak in ethanol solution of O for 5min, take it out and dry it at 80°C to get NiCl 2 / CFP.

[0036] NiCl obtained above 2 / CFP is placed in a quartz reactor, and the temperature is raised at a heating rate of 10K / min. During the heating process, argon gas is introduced at a rate of 100mL / min as a protective gas, and ethylene is used as a carbon source. Argon, the rate of feeding is 200mL / min, after 20min, change to the mixed gas of hydrogen and argon, where hydrogen: argon = 8:5, the rate of passing the mixed gas is 130mL / min, after 40min in the argon atmosphere Naturally cooling to room temperature, the multi-walled carbon nanotube / carbon paper three-dimensional composite material is obtained, and...

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Abstract

The invention discloses a novel three-dimensional electrode material for a lithium air battery and a preparation method for the novel three-dimensional electrode material, and belongs to the field of a chemical power source. The novel three-dimensional electrode material comprises carbon paper, 1-20% of carbon nanotube and 1-20% of catalyst based on the mass percent of the overall electrode material; the carbon nanotube is deposited on the carbon paper by chemical vapor deposition; and the catalyst is loaded on the carbon nanotube by electrochemical deposition. The preparation of a binder-less electrode material is realized; a complex powder electrode preparation process is avoided; and an oxygen electrode is simple in structure and easy to assemble.

Description

technical field [0001] The invention belongs to the field of chemical power sources, and in particular relates to a novel three-dimensional electrode material for a lithium-air battery and a preparation method thereof. Background technique [0002] As an important energy storage method, chemical energy storage can quickly store and release energy. However, the energy density and power density of traditional lead-acid batteries and nickel-metal hydride batteries can no longer meet the requirements of future energy storage systems. The specific capacity of lithium-ion batteries commonly used in the market is close to its theoretical value, and there is no room for significant improvement. . The wide application of various portable electronic devices such as digital cameras, notebook computers and smart phones, coupled with the vigorous development of electric vehicles, put forward higher requirements for high energy density, reversible storage capacity and cycle stability of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/8657H01M4/8803H01M4/8817H01M4/8853Y02E60/50
Inventor 李庆余陈静王红强范小平
Owner GUANGXI NORMAL UNIV
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