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Preparation method and application of porous SnO2 one-dimensional nano magnesium-lithium double-salt ion battery cathode material

A battery positive electrode and positive electrode material technology, applied in the direction of battery electrodes, nanotechnology, nanotechnology, etc., can solve the problems of difficult release of stress, battery capacity attenuation, powdering of electrode materials, etc., to alleviate volume expansion, suppress powdering, enhance The effect of conductivity

Inactive Publication Date: 2019-06-04
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to SnO 2 The electrode presents low electronic conductivity and reduced capacity, and a large volume change of metal Sn often occurs during the electrochemical charge-discharge reaction, and the expansion amount will reach ~300%, which will easily lead to the difficulty in releasing the stress during the battery cycle, thus Eventually lead to rapid pulverization of electrode materials, causing a significant decline in battery capacity and shortening the life of ion batteries

Method used

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  • Preparation method and application of porous SnO2 one-dimensional nano magnesium-lithium double-salt ion battery cathode material
  • Preparation method and application of porous SnO2 one-dimensional nano magnesium-lithium double-salt ion battery cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Porous SnO with a diameter of 100nm and a pore size of 10nm 2 One-dimensional nano-magnesium-lithium double salt ion material cathode preparation;

[0031] step one:

[0032] A certain amount of SnCl 2 2H 2 O was dissolved in a mixed solution composed of absolute ethanol and N,N-dimethylformamide and stirred at room temperature for 1h; The volume is 1ml, where SnCl 2 2H 2 The ratio between O, absolute ethanol and N,N-dimethylformamide is 4:3:3.

[0033] Step two:

[0034] Dissolve a certain amount of PVP in the above solution and continue stirring at room temperature for 3h, the PVP and the SnCl in step one 2 2H 2 O is proportioned according to the mass ratio of 1:1 to obtain the precursor solution A;

[0035] Step three:

[0036] Dissolving 5% (accounting for precursor solution A) liquid paraffin in precursor solution A and stirring for 24 hours to obtain precursor solution B;

[0037] Step 4: (precursor solution B was obtained in step 3, and prec...

Embodiment 2

[0043] Example 2: Porous SnO with a diameter of 200nm and a pore size of 20nm 2 One-dimensional nano-magnesium-lithium double salt ion material cathode preparation;

[0044] step one:

[0045] A certain amount of SnCl 2 2H 2 O was dissolved in a mixed solution composed of absolute ethanol and N,N-dimethylformamide and stirred at room temperature for 1h; The volume is 1ml, where SnCl 2 2H 2 The ratio between O, absolute ethanol, and N,N-dimethylformamide is 4:3:3.

[0046] Step two:

[0047] Dissolve a certain amount of PVP in the above solution and continue stirring at room temperature for 4.5h, the PVP and the SnCl in step one 2 2H 2 O is proportioned according to the mass ratio of 1:1 to obtain the precursor solution A;

[0048] Step three:

[0049] Dissolve 8% (accounting for precursor solution A) of liquid paraffin in precursor solution A and stir for 36 hours to obtain precursor solution B;

[0050] Step 4: (precursor solution B was obtained in step 3, and prec...

Embodiment 3

[0056] Example 3: Porous SnO with a diameter of 300nm and a pore size of 30nm 2 One-dimensional nano-magnesium-lithium double salt ion material cathode preparation;

[0057] step one:

[0058] A certain amount of SnCl 2 2H 2 O was dissolved in a mixed solution composed of absolute ethanol and N,N-dimethylformamide and stirred at room temperature for 1h; The volume is 1ml, where SnCl 2 2H 2 The ratio between O, absolute ethanol and N,N-dimethylformamide is 4:3:3.

[0059] Step two:

[0060] Dissolve a certain amount of PVP in the above solution and continue to stir at room temperature for 6h, the PVP and the SnCl in step one 2 2H 2 O is proportioned according to the mass ratio of 1:1 to obtain the precursor solution A;

[0061] Step three:

[0062] Dissolve 10% (accounting for precursor solution A) of liquid paraffin in precursor solution A and stir for 48 hours to obtain precursor solution B;

[0063] Step 4: (precursor solution B was obtained in step 3, and precurs...

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Abstract

Provided are a preparation method and an application of a porous SnO2 one-dimensional nano magnesium-lithium double-salt ion battery cathode material. The porous SnO2 one-dimensional nano cathode material has a diameter of 100-300nm and a pore diameter of 10-30nm. The preparation method includes the following steps: dissolving a certain amount of SnCl2.2H2O in a mixed solution composed of anhydrous ethanol and N,N-dimethylformamide and carrying out stirring at room temperature; dissolving a certain amount of PVP in the solution and continuing to carry out stirring at room temperature to obtaina precursor solution A; dissolving liquid paraffin in the precursor solution A and carrying out stirring to obtain a precursor solution B; and using the precursor solution B in high-voltage electrostatic spinning, carrying out secondary annealing on the spinning product, and naturally cooling the spinning product to room temperature to obtain final sample porous SnO2. The powdering of the cathodematerial is suppressed, and the service life of magnesium-lithium double-salt ion batteries is increased. In addition, the porous structure of SnO2 nanotubes can provide a channel for rapid intercalation / de-intercalation of Li+ ions and improve the dynamic characteristic of batteries.

Description

technical field [0001] The invention relates to the technical field of secondary power battery materials, in particular to a porous SnO 2 A preparation method and application of a one-dimensional nanometer magnesium-lithium double-salt ion battery cathode material. Background technique [0002] Information, materials, and energy are the three pillars of modern human civilization. The development and utilization of energy significantly affects people's living standards and social development. Every energy revolution is bound to promote social and economic development and the modernization process of mankind. [0003] At present, lithium-ion batteries have been widely commercialized and occupy a large market share in the commercial rechargeable battery market. However, problems such as limited capacity of lithium-ion batteries, shortage of resources, high cost and safety performance force what has to seek new ion batteries to "drive" future life. Among the many ion batterie...

Claims

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Application Information

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IPC IPC(8): H01M4/38H01M4/48H01M10/0525B82Y30/00B82Y40/00D01D5/00D04H1/728
CPCY02E60/10
Inventor 侯小江王祎杨艳玲叶晓慧石洪昌王嘉栋冯雷锁国权张荔朱建锋
Owner SHAANXI UNIV OF SCI & TECH
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