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MOF catalytic growth carbon nanotube coated nickel-tin alloy electrode material as well as preparation method and application thereof

A nickel-tin alloy and electrode material technology, applied in chemical instruments and methods, negative electrodes, battery electrodes, etc., can solve the problems of material instability, reduced material cycle stability, and no conductivity, etc. The effect of high stability and capacity

Active Publication Date: 2021-12-17
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The theoretical capacity of the electrode material is low, partly due to the fact that the carbon material coated on the outer layer of the material is amorphous carbon, which is not conductive compared with carbon nanotubes, which is not conducive to the transmission of lithium ions
In addition, the combination of carbon materials and alloy materials also has a certain impact on the electrochemical performance of the battery. For example, in the process of lithium ion insertion / deintercalation, the material is unstable and easy to separate from the electrode sheet, resulting in a decrease in the cycle stability of the material.

Method used

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  • MOF catalytic growth carbon nanotube coated nickel-tin alloy electrode material as well as preparation method and application thereof
  • MOF catalytic growth carbon nanotube coated nickel-tin alloy electrode material as well as preparation method and application thereof
  • MOF catalytic growth carbon nanotube coated nickel-tin alloy electrode material as well as preparation method and application thereof

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Experimental program
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Effect test

preparation example Construction

[0036] 1. Hollow SnO 2 Preparation of nanospheres

[0037] SnO with hollow structure synthesized by hydrothermal method 2 nanospheres. In the experiment, put 0.1g of sodium stannate tetrahydrate into a beaker, then add 25mL of deionized water and 15mL of ethanol under magnetic stirring, then add 0.24g of urea into the beaker and stir until completely dissolved. Subsequently, the above solution was transferred to a 100 mL polytetrafluoroethylene-lined stainless steel reactor, and heated in an oven at 150 °C for 15 h for hydrothermal reaction. After cooling to room temperature, the precipitate was separated by centrifugation and washed with deionized water. ℃ dried in a vacuum oven overnight.

[0038] 2. Ni-BTC@SnO 2 preparation of

[0039] 0.05g SnO 2 Pack into and fill the beaker of the 30mL mixed solvent that deionized water: ethanol:DMF=1:1:1 is made into, then add 432mg Ni(NO 3 ) 2 ·6H 2 O, 150mg BTC and 1.5g PVP, stirred vigorously at room temperature until comple...

Embodiment 1

[0043] Put 0.1g of sodium stannate tetrahydrate into a beaker, then add 25mL of deionized water and 15mL of ethanol under magnetic stirring, then add 0.24g of urea into the beaker and stir until completely dissolved. Subsequently, the above solution was transferred to a 100 mL polytetrafluoroethylene-lined stainless steel reactor, and heated in an oven at 150 °C for 15 h for hydrothermal reaction. After cooling to room temperature, the precipitate was separated by centrifugation and washed with deionized water. ℃ dried in a vacuum oven overnight.

[0044] 0.05g SnO 2 Pack into and fill the beaker of the 30mL mixed solvent that deionized water: ethanol:DMF=1:1:1 is made into, then add 432mg Ni(NO 3 ) 2 ·6H 2 O, 150mg BTC and 1.5g PVP, stirred vigorously at room temperature until completely dissolved. Subsequently, the bright green solution obtained above was transferred to a 50 mL polytetrafluoroethylene-lined stainless steel reaction kettle, and heated in an oven at 150 °C...

Embodiment 2

[0048] Put 0.1g of sodium stannate tetrahydrate into a beaker, then add 25mL of deionized water and 15mL of ethanol under magnetic stirring, then add 0.24g of urea into the beaker and stir until completely dissolved. Subsequently, the above solution was transferred to a 100 mL polytetrafluoroethylene-lined stainless steel reactor, and heated in an oven at 150 °C for 15 h for hydrothermal reaction. After cooling to room temperature, the precipitate was separated by centrifugation and washed with deionized water. ℃ dried in a vacuum oven overnight.

[0049] 0.05g SnO 2 Pack into and fill the beaker of the 30mL mixed solvent that deionized water: ethanol:DMF=1:1:1 is made into, then add 432mg Ni(NO 3 ) 2 ·6H 2 O, 150mg BTC and 1.5g PVP, stirred vigorously at room temperature until completely dissolved. Subsequently, the bright green solution obtained above was transferred to a 50 mL polytetrafluoroethylene-lined stainless steel reaction kettle, and heated in an oven at 150 °C...

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Abstract

The invention relates to a metal organic framework (MOF) catalytic growth carbon nanotube (CNT) coated nickel-tin alloy electrode material as well as preparation and application thereof. Stannic oxide (SnO2) is added into a Ni-MOF precursor solution to be stirred and mixed at room temperature and then to be put into a hydrothermal kettle for hydrothermal reaction so as to obtain the MOF-SnO2 composite material. The MOF-SnO2 composite material can be prepared into the CNT coated nickel-tin alloy composite material through a chemical vapor deposition (CVD) method. The surface of the nickel-tin alloy is coated with the CNT catalytically grown by the MOF, so that the ion and electron conductivity can be improved, and meanwhile, the cycling stability of the electrode material can be effectively improved due to the unique stability of the CNT. The method for growing the CNT through catalytic coating of the MOF is simple in preparation process, low in energy consumption and environmentally friendly, and is suitable for large-scale production of lithium ion batteries and supercapacitors.

Description

technical field [0001] The invention relates to a design and preparation method of an MOF catalyzed growth carbon nanotube (CNT) coated nickel-tin alloy electrode material, and its application as a negative electrode of a lithium ion battery, belonging to the technical field of functional nanomaterials. Background technique [0002] With the continuous development and progress of science and technology, people's demand for energy is increasing day by day. The excessive use of non-renewable fossil energy has caused a series of environmental problems such as global warming and air pollution. Therefore, researching an environment-friendly clean energy source has become an urgent need for current social development. Here, emerging energy sources such as supercapacitors and lithium-ion batteries emerge as the times require. Among them, lithium-ion batteries have been widely used in hybrid vehicles, mobile phones, notebook computers and other products closely related to people's...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/0525C01B32/162
CPCH01M4/366H01M4/387H01M4/625H01M4/628H01M10/0525C01B32/162H01M2004/021H01M2004/027Y02E60/10
Inventor 林惠娟尚欢张小培
Owner NANJING UNIV OF TECH
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