Nano-scale cube cobalt stannate and graphene composite material and preparation method and application thereof

A composite material, cube technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve serious environmental problems, endanger ecology, unevenness and other problems, achieve electrochemical performance improvement, speed up The effect of speed and low preparation cost

Inactive Publication Date: 2018-03-13
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During use, the waste liquid containing surfactants is inevitably discharged into water bodies, soils and other environments. The existence of surfactants will lead to more and more serious environmental problems, and even endanger the entire ecology.
At the same time, its disadvantage is that the method of mechanical stirring is used for mixing in the preparation method, which will inevitably make graphene coat ZnSnO 3 uneven phenomenon

Method used

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  • Nano-scale cube cobalt stannate and graphene composite material and preparation method and application thereof
  • Nano-scale cube cobalt stannate and graphene composite material and preparation method and application thereof
  • Nano-scale cube cobalt stannate and graphene composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In the first step, 1mmol Na 2 SnO 3 Dissolve in 20ml deionized water to obtain solution A; 1mmol CoSO 4 Dissolve in 20ml deionized water to obtain solution B; add solution A dropwise to solution B, stir at room temperature for 0.5h; centrifuge wash the product with distilled water and absolute ethanol for 2-3 times, and then place it in an oven at 80°C After drying for 12 hours, the precursor CoSn(OH) of nanoscale cubes can be obtained 6 .

[0045] In the second step, the precursor CoSn(OH) 6 Place it in an atmosphere tube furnace and keep it warm for 4 hours at 300°C to obtain CoSnO with nanoscale cubic shape. 3 .

[0046] The third step is the preparation of electrode sheets for sodium-ion batteries for testing. Nanoscale cubic CoSnO 3 And natural carbon black, binder CMC (carboxymethyl cellulose) in a certain ratio (8:1:1) to prepare a sodium ion battery negative electrode test pole piece, the detailed method is:

[0047] (1) According to the ratio of 8:1:1, ...

Embodiment 2

[0055] The first step is the same as the first step in embodiment 1.

[0056] The second step is to grind graphite oxide to obtain a brownish-yellow powder; use an ultrasonic cell pulverizer to uniformly disperse 20mg of graphite oxide powder in 4ml of ethylene glycol, and prepare a 5mg / ml graphite oxide-ethylene glycol dispersion; weigh 50mg of precursor Bulk CoSn(OH) 6 At the same time, measure 30ml of butanol, add it to the prepared graphite oxide-ethylene glycol dispersion, and stir at room temperature for 0.5h; transfer the obtained precursor mixture to a polytetrafluoroethylene lining, and use a stainless steel reactor After sealing, heat to 200°C and keep it warm for 6 hours; after the reaction, cool to normal temperature at room temperature, take out the product, wash with deionized water and ethanol for 2-3 times, and freeze-dry; dry the obtained product at 300 Cubic CoSnO nanoscale was obtained after 4 hours of heat preservation at ℃ and natural cooling. 3 and grap...

Embodiment 3

[0066] The first step is the same as the first step in Example 1.

[0067] The second step is to grind graphite oxide to obtain a brownish-yellow powder; use an ultrasonic cell pulverizer to uniformly disperse 60mg of graphite oxide powder in 60ml of ethylene glycol, and prepare a 1mg / ml graphite oxide-ethylene glycol dispersion; weigh 200mg of precursor Bulk CoSn(OH) 6 At the same time, measure 50ml of butanol, add it to the prepared graphite oxide-ethylene glycol dispersion, and stir at room temperature for 0.5h; transfer the obtained precursor mixture to a polytetrafluoroethylene lining, and use a stainless steel reactor After sealing, heat to 120°C and keep it warm for 6 hours; after the reaction, cool to room temperature at room temperature, take out the product, wash with deionized water and ethanol for 2-3 times, and freeze-dry; dry the obtained product at 300 Cubic CoSnO nanoscale was obtained after 4 hours of heat preservation at ℃ and natural cooling. 3 and graphen...

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Abstract

The invention discloses a nano-scale cube CoSnO<3> and graphene composite material. The composite material is characterized in that nano-scale cube CoSnO<3> and gauzy graphene form a coating structure. The nano-scale cube CoSnO<3> and graphene composite material is prepared by a simple and easy method, wherein the nano-scale cube CoSnO<3> is uniformly coated with graphene, and by virtue of graphene coating, the conductivity of the CoSnO<3> material is greatly improved; meanwhile, volume expansion of the CoSnO<3> material is also relieved, and pulverization and falling off of the electrode material are also suppressed effectively; and therefore, when the nano-scale cube CoSnO<3> and graphene composite material prepared in the invention is used as the negative electrode material of a sodiumion battery, excellent discharge specific capacity and stable cycle performance are represented.

Description

technical field [0001] The invention relates to the field of sodium ion battery materials, in particular to a nanoscale cubic cobalt stannate CoSnO 3 And graphene composite materials and their preparation methods and applications. Background technique [0002] In recent decades, due to the massive consumption of fossil fuels around the world, the depletion of fossil fuel resources and the increasing environmental pollution have had a major impact on human survival and development. In order to reduce dependence on fossil fuels and alleviate the problem of environmental degradation, renewable and clean energy sources such as wind energy, solar energy, biomass energy, tidal energy, and geothermal energy have been vigorously developed. Since the large-scale energy storage grid system can integrate these intermittent renewable energy into the grid, the construction of the energy storage grid system is indispensable. Among different energy storage technologies, rechargeable seco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/583H01M10/054B82Y30/00
CPCB82Y30/00H01M4/362H01M4/52H01M4/583H01M10/054Y02E60/10
Inventor 李喜飞窦树明李德军孙学良范林林颜波
Owner TIANJIN NORMAL UNIVERSITY
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