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MoO2/Mo4O11 hybrid-phase nanometer electrode material and preparation method thereof

A nano-electrode, mo4o11 technology, applied in the direction of battery electrodes, circuits, electrical components, etc., to achieve the effect of cheap and easy-to-obtain raw materials, suitable for large-scale production, and high safety

Active Publication Date: 2018-02-16
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Currently, on the synthesis of MoO 2 / Mo 4 o 11 The method of lithium-ion battery negative electrode material has not been reported yet

Method used

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  • MoO2/Mo4O11 hybrid-phase nanometer electrode material and preparation method thereof
  • MoO2/Mo4O11 hybrid-phase nanometer electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Weigh 1g ammonium molybdate tetrahydrate ((NH 4 ) 6 Mo 7 o 24 4H 2 O), dissolved in a mixed solvent with a volume of 60 ml (volume ratio water: absolute ethanol = 11:1), stirred for 20 min, and then adjusted to pH = 1 with 3mol / L HCl while stirring to obtain a uniform solution A ;

[0031] (2) Pour the stirred solution A into a polytetrafluoroethylene-lined hydrothermal kettle, seal it, and then place it in a homogeneous reactor for solvothermal reaction at a temperature of 150°C for 15 hours;

[0032] (3) After the reaction, the reaction kettle was cooled at room temperature, the product was alternately washed 6 times with deionized water and absolute ethanol, and vacuum-dried to obtain product B;

[0033] (4) Weigh 0.5g of the vacuum-dried product B, put it in a porcelain boat and heat-treat it in Ar. The heat-treatment temperature is 600°C, the time is 2h, and the heating rate is 5°C / min to obtain the target product MoO 2 / Mo 4 o 11 .

[0034] figure 1 ...

Embodiment 2

[0037] (1) Weigh 1g ammonium molybdate tetrahydrate ((NH 4 ) 6 Mo 7 o 24 4H 2O), dissolved in a mixed solvent with a volume of 60 ml (volume ratio water: absolute ethanol = 11:1), stirred for 20 min, and then adjusted to pH = 1 with 12mol / L HCl while stirring to obtain a uniform solution A ;

[0038] (2) Pour the stirred solution A into a polytetrafluoroethylene-lined hydrothermal kettle, seal it, and then place it in a homogeneous reactor for solvothermal reaction at a reaction temperature of 150°C for 24 hours;

[0039] (3) After the reaction, the reaction kettle was cooled at room temperature, the product was alternately washed 6 times with deionized water and absolute ethanol, and vacuum-dried to obtain product B;

[0040] (4) Weigh 0.5g of the vacuum-dried product B, put it in a porcelain boat and heat-treat it in Ar. The heat-treatment temperature is 600°C, the time is 2h, and the heating rate is 10°C / min to obtain the target product MoO 2 / Mo 4 o 11 .

Embodiment 3

[0042] (1) Weigh 1g ammonium molybdate tetrahydrate ((NH 4 ) 6 Mo 7 o 24 4H 2 O), dissolved in a mixed solvent with a volume of 60 ml (volume ratio water: absolute ethanol = 5:1), stirred for 20 min, and then adjusted to pH = 1 with 3mol / L HCl while stirring to obtain a uniform solution A ;

[0043] (2) Pour the stirred solution A into a polytetrafluoroethylene-lined hydrothermal kettle, seal it, and then place it in a homogeneous reactor for solvothermal reaction at a temperature of 150°C for 15 hours;

[0044] (3) After the reaction, the reaction kettle was cooled at room temperature, the product was alternately washed 6 times with deionized water and absolute ethanol, and vacuum-dried to obtain product B;

[0045] (4) Weigh 0.5g of the vacuum-dried product B, put it in a porcelain boat and heat-treat it in Ar. The heat-treatment temperature is 500°C, the time is 2h, and the heating rate is 5°C / min to obtain the target product MoO 2 / Mo 4 o 11 .

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Abstract

The invention discloses a preparation method of a MoO2 / Mo4O11 hybrid-phase nanometer electrode material. The preparation method comprises the step s of 1) dissolving a molybdenum source in an enough amount of alcohol-water mixed solvent according to a formula ratio, performing full stirring, and adjusting pH to 1-5 with an oxidization oxygen-containing acid; 2) performing solvothermal reaction onthe product, wherein the reaction temperature is 90-150 DEG C, and the reaction time is 6-24 hours; 3) cooling, washing and drying the product after reaction is completed; and 4) placing the product under an inert atmosphere of 500-800 DEG C for thermal processing for 1-3 hours to obtain a target product MoO2 / Mo4O11. The invention also discloses the MoO2 / Mo4O11 hybrid-phase nanometer electrode material. The material has conductivity similar to metal, the theoretical capacity of two phases is considerable, and the lithium ion battery electrode has great advantage. The method is simple to operate, and the prepared product is uniform in morphology distribution.

Description

technical field [0001] The invention belongs to the technical field of battery materials, in particular to a MoO 2 / Mo 4 o 11 Mixed phase nano electrode material and its preparation method. Background technique [0002] Lithium-ion batteries have been widely used in aerospace, hybrid electric vehicles and portable electronic devices due to their significant advantages such as high specific capacity, light weight, long life and no memory. At present, the energy density of commercial graphite anode is low, and there is a huge safety hazard due to the easy precipitation of lithium dendrites and the interaction with the electrolyte, which greatly limits its development and application. [0003] Many important transition metal oxides involve conversion reaction mechanisms in the electrode reaction process, so these materials often have high reversible specific capacity and energy density. Molybdenum-based oxide materials are an important class of oxide materials. Due to the ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48
CPCH01M4/364H01M4/48Y02E60/10
Inventor 曹丽云贺菊菊李嘉胤黄剑锋齐樱张宁仵婉晨李倩颖
Owner SHAANXI UNIV OF SCI & TECH
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