Synthesis method of sodium titanate nanoribbon/titanium carbide nanosheet compound

A synthesis method, titanium carbide technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve adverse energy storage device cycle stability and rate performance, weak interaction, poor electron transfer Interface and other issues, to achieve the effect of facilitating electron transfer, fast electron transfer, and improving charge/discharge specific capacity

Active Publication Date: 2018-06-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The titanium carbide / metal ion composite material in this patent is prepared based on electrostatic adsorption, which results in a weak interaction between titanium carbide and metal ions and a poor electron transfer interface, which is not conducive to the cycle stability and stability of energy storage devices. rate performance, and only a small amount of positively charged metal ions are adsorbed on the titanium carbide surface

Method used

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  • Synthesis method of sodium titanate nanoribbon/titanium carbide nanosheet compound
  • Synthesis method of sodium titanate nanoribbon/titanium carbide nanosheet compound
  • Synthesis method of sodium titanate nanoribbon/titanium carbide nanosheet compound

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Experimental program
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Embodiment 1

[0021] Add 30ml HF (50%) into the polytetrafluoroethylene reactor, add magneton, 1gTi 3 AlC 2 was added slowly (approximately 5 minutes). The reaction kettle was put into a water bath filled with water, the temperature of the water bath was set at 50° C., and the stirring speed was 550 rpm. The reaction time is 12 hours, the reaction kettle is taken out and cooled, and the samples are washed with water and ethanol respectively until the pH of the washing solution is 6-7, ultrasonicated at 400 watts for half an hour, centrifuged, and dried at room temperature to obtain a two-dimensional layered Ti 3 C 2 . Take 0.2g Ti 3 C 2 Add it to 30 ml of 2 mol / L sodium hydroxide solution, add magnets, and react at room temperature under magnetic stirring. After reacting for 100 hours, wash, centrifuge, and dry in a vacuum oven at 60°C to obtain the product.

Embodiment 2

[0023] Add 30ml HF (50%) into the polytetrafluoroethylene reactor, add magneton, 1g Ti 3 AlC 2was added slowly (approximately 5 minutes). The reaction kettle was put into a water bath filled with water, the temperature of the water bath was set at 50° C., and the stirring speed was 550 rpm. The reaction time is 24 hours. Take out the reaction kettle to cool down, wash the sample with ethanol and water respectively until the pH of the washing solution is 6-7, sonicate for half an hour at 400 watts, centrifuge, and dry at room temperature to obtain a two-dimensional layered Ti 3 C 2 . Take 0.2g Ti 3 C 2 Add it to 30 ml of 2 mol / L sodium hydroxide solution, add magnets, and react at room temperature under magnetic stirring. After reacting for 120 hours, wash, centrifuge, and dry in a vacuum oven at 60°C to obtain the product.

Embodiment 3

[0025] Add 30ml HF (50%) into the polytetrafluoroethylene reactor, add magneton, 1g Ti 3 AlC 2 was added slowly (approximately 5 minutes). The reaction kettle was put into a water bath filled with water, the temperature of the water bath was set at 50° C., and the stirring speed was 550 rpm. The reaction time is 24 hours, take out the reaction kettle to cool, wash the sample with ethanol and water respectively until the pH of the washing solution is 6-7, sonicate for half an hour at 400 watts, centrifuge, and dry at room temperature to obtain a two-dimensional layered Ti3C2 . Take 0.2g Ti 3 C 2 Add it to 30 ml of 2 mol / L sodium hydroxide solution, add magnets, and react at room temperature under magnetic stirring. After reacting for 10 hours, wash, centrifuge, and dry in a vacuum oven at 60°C to obtain the product. image 3 Prepare Na for this embodiment 0.23 TiO 2 / Ti 3 C 2 Electrochemical properties of the composites as anode materials for lithium-ion batteries and ...

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Abstract

The invention relates to a synthesis method of a sodium titanate nanoribbon/titanium carbide nanosheet compound. The method comprises the following steps: slowly adding Ti3AlC2 powder into a hydrofluoric acid solution, and then stirring under the condition of heating for carrying out a reaction; after the reaction is finished, cooling, washing, carrying out ultrasonic treatment, and freeze-dryingto obtain two-dimensional layered Ti3C2; adding the obtained two-dimensional layered Ti3C2 into a strong alkaline solution with a certain concentration, enabling the mixed solution to react at the room temperature under the condition of magnetic stirring, washing, centrifuging, and carrying out vacuum drying to obtain the sodium titanate nanoribbon/titanium carbide nanosheet compound. The sodium titanate nanoribbon/titanium carbide nanosheet compound is simple in preparation method, high in controllability, novel in morphology, uniform in size distribution, stable in structure and good in repeatability; furthermore, sodium titanate grows on titanium carbide nanosheets in situ and is in good electrical contact with the titanium carbide nanosheets, so that rapid electron transfer is facilitated. When being used as an electrode material for lithium ion batteries and sodium ion batteries, the sodium titanate nanoribbon/titanium carbide nanosheet compound shows good electrochemical performance.

Description

technical field [0001] The invention relates to a synthesis method of an ion battery negative electrode material, in particular to a synthesis method of a 1D sodium titanate nanobelt / 2D titanium carbide nanosheet sandwich composite structure. Background technique [0002] With the continuous consumption of fossil energy, the problem of energy crisis and environmental pollution is becoming more and more prominent. Therefore, the development of clean and renewable new energy and its rational use have become problems that need to be solved urgently. A chemical power source is a device that can realize mutual conversion between electrical energy and chemical energy, and is an important medium that can make more rational use of energy. The urgent needs of the market have led to the emergence of new lithium-ion batteries, sodium-ion batteries and supercapacitors. Among them, lithium-ion battery, as the latest type of secondary battery, is favored due to its superior performance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/485H01M4/62H01M10/0525H01M10/054H01G11/24H01G11/30H01G11/46B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/24H01G11/30H01G11/46H01M4/366H01M4/483H01M4/485H01M4/624H01M10/0525H01M10/054Y02E60/10
Inventor 杨金虎黄继梅孟瑞晋冯楠
Owner TONGJI UNIV
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