Method for preparing flexible stannous oxide nano sheet/carbon nanotube-graphene three-dimensional composite material

A technology of stannous oxide and carbon nanotubes, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as poor cycle performance, low rate, and low specific capacity of lithium battery anode materials , to achieve high conductivity, improve utilization, and good cycle stability

Active Publication Date: 2015-05-13
天津北方焦耳新能源科技有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low specific capacity, low rate and poor cycle performance of lithium battery negative electro...

Method used

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  • Method for preparing flexible stannous oxide nano sheet/carbon nanotube-graphene three-dimensional composite material
  • Method for preparing flexible stannous oxide nano sheet/carbon nanotube-graphene three-dimensional composite material
  • Method for preparing flexible stannous oxide nano sheet/carbon nanotube-graphene three-dimensional composite material

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specific Embodiment approach 1

[0050] Embodiment 1: This embodiment is a preparation method of a flexible stannous oxide nanosheet / carbon nanotube-graphene three-dimensional composite material, which is prepared according to the following steps:

[0051] 1. Preparation of three-dimensional graphene foam:

[0052] ①. Clean the nickel foam with absolute ethanol for 3 to 5 times to obtain the nickel foam after cleaning with absolute ethanol; then put the nickel foam after cleaning with absolute ethanol into a quartz tube furnace, and then add argon and hydrogen Flow rate of 500sccm and 200sccm into the quartz tube furnace respectively, and then heat the quartz tube furnace to 1000℃~1050℃ at a heating rate of 10℃ / min~15℃ / min, and then heat it at a temperature of 1000℃~ React at 1050°C and a mixed gas atmosphere of argon and hydrogen for 4 minutes to 6 minutes; obtain foamed nickel with the oxide layer removed;

[0053] ②. Feed methane, hydrogen and argon into a quartz tube furnace at a temperature of 1000°C to...

specific Embodiment approach 2

[0080] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the mixed solution A described in step one 4. is to be that 25%~30% ferric nitrate aqueous solution and the mass fraction are mixed by the hydrochloric acid of 37% by mass fraction Prepared; in the mixed solution A, the volume ratio of the ferric nitrate aqueous solution with a mass fraction of 25% to 30% and the hydrochloric acid with a mass fraction of 37% is 8:1. Others are the same as the first embodiment.

specific Embodiment approach 3

[0081] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the Ni(NO 3 ) 2 ·6H 2 The volume ratio of the amount of O substance to deionized water is (1mmol-100mmol): 40mL. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for preparing a flexible stannous oxide nano sheet/carbon nanotube-graphene three-dimensional composite material, relates to a method for preparing a three-dimensional composite material, and aims at solving the problems that a lithium battery cathode material prepared by using a conventional method is low in specific capacity, low in multiplying power and poor in recycling property. The method comprises the following steps: I, preparing three-dimensional graphene foam; II, preparing a carbon nanotube-graphene foamed three-dimensional composite material; III, growing stannous oxide nano sheets. The flexible stannous oxide nano sheet/carbon nanotube-graphene three-dimensional composite material prepared by using the method keeps high specific capacity of greater than 900mAh/g at 100mA/g, the capacity is not remarkably attenuated after the material is recycled for 100 times; the material is good in mechanical stability and good in flexibility, and is free of breakage or peeling when being repeatedly bent. The flexible stannous oxide nano sheet/carbon nanotube-graphene three-dimensional composite material can be prepared by using the method disclosed by the invention.

Description

technical field [0001] The invention relates to a preparation method of a three-dimensional composite material. Background technique [0002] Energy shortage and environmental pollution are becoming more and more serious, and environmentally friendly green new energy has become the focus and hot spot of social attention. Lithium-ion batteries have been widely used in energy storage and portable electronic devices due to their excellent performance of high operating voltage, high capacity and low toxicity. At present, graphite is widely used commercially as the anode material for lithium batteries, but its low theoretical specific capacity (372mAh g-1) and low lithium ion transport coefficient (10 -7 ~10 -10 cm 2 the s -1 ) and the like cannot meet the needs of lithium-ion batteries for higher energy density and power density, so it is necessary to develop and design new lithium-ion battery anode materials with high specific capacity, high rate performance and superior cy...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/04H01M4/139B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/04H01M4/139H01M4/362H01M4/48H01M10/052Y02E60/10
Inventor 陈明华陈庆国殷景华
Owner 天津北方焦耳新能源科技有限公司
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