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Tin-manganese stannate-nitrogen carbon composite material with hollow cubic structure as well as preparation method and application thereof

A technology of composite materials and cubes, applied in nanotechnology, structural parts, active material electrodes, etc. for materials and surface science, can solve poor performance and unstudied electrochemical performance of tin-carbon composite nanoparticles sodium-ion battery anode materials And other issues

Active Publication Date: 2021-09-07
多助科技(武汉)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The tin-carbon composite nanoparticles have poor performance in alleviating volume expansion, with an initial capacity of 1044mAhg -1 , only 480mAhg is left after 250 cycles -1 , and the patent did not study the electrochemical performance of hollow-structured tin-carbon composite nanoparticles as anode materials for sodium-ion batteries

Method used

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  • Tin-manganese stannate-nitrogen carbon composite material with hollow cubic structure as well as preparation method and application thereof
  • Tin-manganese stannate-nitrogen carbon composite material with hollow cubic structure as well as preparation method and application thereof
  • Tin-manganese stannate-nitrogen carbon composite material with hollow cubic structure as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A hollow cubic structure of Sn@Mn 2 SnO 4 -The preparation method of NC composite material specifically comprises the following steps:

[0043] S1. Add 10ml of 0.2M SnCl 4 ·5H 2 O solution and 80ml containing 0.025M ZnCl 2 Mix with a solution of 0.025M citric acid, and after stirring evenly, add 40ml of 0.5M NaOH solution to the above solution, and after centrifugation, washing and drying, ZnSn(OH) 6 white solid precipitate;

[0044] S2. The obtained ZnSn(OH) 6 Oxidation at 600°C in air yields SnO 2 @Zn 2 SnO 4 ; 464 mg SnO 2 @Zn 2 SnO 4 Disperse in 50ml of water, add 1.315g of EDTA, transfer to a reaction kettle and heat to 220°C for 12h, after washing and drying, SnO 2 ;

[0045] S3. 100mg SnO 2 with 200mg K 2 MnO 4 After mixing evenly, add 100 microliters of 37% HCl solution and heat to 110°C for 6 hours. After washing and drying, SnO 2 @MnO 2 ;

[0046] S4. Add 100mg of SnO 2 @MnO 2 Ultrasonic dispersion in 100mL Tris buffer, after 10 minutes of...

Embodiment 2

[0050] A hollow cubic structure of Sn@Mn 2 SnO 4 -The preparation method of NC composite material specifically comprises the following steps:

[0051] S1. Add 10ml of 0.2M SnCl 4 ·5H 2 O solution and 80ml containing 0.05M ZnCl 2 Mix with 0.05M citric acid solution, stir evenly, then add 40ml 1M NaOH solution to the above solution, after centrifugation, washing and drying, ZnSn(OH) 6 white solid precipitate;

[0052] S2. The obtained ZnSn(OH) 6 The product is oxidized at 300°C in air to obtain SnO 2 @Zn 2 SnO 4 ; 464mg SnO 2 @Zn 2 SnO 4 Disperse in 50ml of water, add 1.753g of EDTA, transfer to a reaction kettle and heat to 200°C for 12h, after washing and drying, SnO 2 ;

[0053] S3. 100mg SnO 2 with 200mg K 2 MnO 4 After mixing evenly, add 80 microliters of 37% HCl solution and heat to 120°C for 6 hours. After washing and drying, SnO 2 @MnO 2 ;

[0054] S4. Add 100mg of SnO 2 @MnO 2 Ultrasonic dispersion in 100mL Tris buffer, after ultrasonication for 10 ...

Embodiment 3

[0057] A hollow cubic structure of Sn@Mn 2 SnO 4 -The preparation method of NC composite material specifically comprises the following steps:

[0058] S1. Add 10ml of 0.2M SnCl 4 ·5H 2 O solution and 80ml containing 0.025M ZnCl 2 Mix with 0.1M citric acid solution, stir evenly, then add 30ml 2M NaOH solution to the above solution, after centrifugation, washing and drying, ZnSn(OH) 6 white solid precipitate;

[0059] S2. The obtained ZnSn(OH) 6 The product is oxidized at 800°C in air to obtain SnO 2 @Zn 2 SnO 4 ; 464mg SnO 2 @Zn 2 SnO 4Disperse in 50ml of water, add 1.753g of EDTA, transfer to a reaction kettle and heat to 220°C for 12h, after washing and drying, SnO 2 ;

[0060] S3. 100mg SnO 2 with 200mg K 2 MnO 4 After mixing evenly, add 80 microliters of 37% HCl solution and heat to 160°C for 6 hours. After washing and drying, SnO 2 @MnO 2 ;

[0061] S4. Add 100mg of SnO 2 @MnO 2 Ultrasonic dispersion in 100mL Tris buffer, after 10 minutes of ultrasonic...

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Abstract

The invention discloses a tin-manganese stannate-nitrogen carbon composite material with a hollow cubic structure as well as a preparation method and application thereof. The composite material is prepared by taking zinc hydroxystannate as a Sn source precursor, potassium permanganate as a Mn source precursor and dopamine as a nitrogen-doped carbon precursor through a multi-step hydrothermal method and a high-temperature carbonization method. The composite material is of a hollow cubic structure, and the cubic structure can provide enough space to buffer volume expansion during charging and discharging, so the pulverization of an electrode is prevented. Meanwhile, the carbon layer wrapped on the outer layer of the composite material relieves the stress of the volume change of the electrode on one hand, and improves the conductivity of the material on the other hand. Particularly, nitrogen atoms are doped, so that the carbon material has more defects, the conductivity of electrons / ions is improved, the transmission of the electrons / ions is accelerated, and the specific capacity and the cycle performance of the material are improved.

Description

technical field [0001] The present invention relates to the technical field of electrode materials for sodium ion batteries, more specifically, to a hollow cubic structure of tin-manganese stannate-nitrogen carbon (Sn@Mn 2 SnO 4 -NC) composite material preparation method and its application. Background technique [0002] Lithium-ion batteries are already the main power behind a variety of portable electronics and electric vehicles. However, the limitations and uneven distribution of lithium resources in the earth's crust make it unable to meet the growing demand for energy storage devices. Na-ion batteries are considered as a promising alternative due to their natural abundance and environmental friendliness. Tin-based materials are popular anode materials in the field of batteries, with high theoretical specific capacity. Using tin-based materials as anode materials for sodium batteries should theoretically have good specific capacity and stable cycle performance. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36B82Y30/00H01M4/38H01M4/58H01M4/62H01M10/054
CPCH01M4/362H01M4/625H01M4/387H01M4/5825H01M10/054B82Y30/00H01M2004/027H01M2004/021Y02E60/10
Inventor 刘启明万淑云
Owner 多助科技(武汉)有限公司
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