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One-dimensional manganese oxide/carbon coaxial hollow nanorod as well as preparation method and application of nanorod

A technology of manganese oxide and nanorods, applied in the field of nanomaterials and electrochemistry, to achieve good cycle stability, improve cycle stability, and good repeatability

Active Publication Date: 2015-01-21
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the one-dimensional manganese oxide / carbon coaxial hollow nanorod structure has not been reported as an electrochemically active material.

Method used

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  • One-dimensional manganese oxide/carbon coaxial hollow nanorod as well as preparation method and application of nanorod
  • One-dimensional manganese oxide/carbon coaxial hollow nanorod as well as preparation method and application of nanorod
  • One-dimensional manganese oxide/carbon coaxial hollow nanorod as well as preparation method and application of nanorod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The preparation method of one-dimensional manganese oxide / carbon coaxial hollow nanorod comprises the following steps:

[0047] 1) Dissolve 8 mmol of manganese sulfate monohydrate and 8 mmol of ammonium thiosulfate in 70 ml of deionized water, and mix and stir for 30 minutes;

[0048] 2) Pour the solution obtained in step 1) into a 100ml reaction kettle, seal the reaction kettle well, and conduct a hydrothermal reaction at 120°C for 12 hours;

[0049] 3) Use deionized water and absolute ethanol to repeatedly centrifuge and wash the precipitate obtained in the step 2) hydrothermal reaction, and dry it in an oven at 70°C to obtain manganese oxide;

[0050] 4) Weighing 100 mg of step 3) The obtained manganese oxide nanorods are dispersed in 100 ml of 0.1 mol / L HCl solution, magnetically stirred for 1 hour, and the sample is acidified;

[0051] 5) The product obtained in step 4) was repeatedly washed with deionized water and ethanol until the pH value was 7;

[0052] 6) u...

Embodiment 2

[0067] The preparation method of one-dimensional manganese oxide / carbon coaxial hollow nanorod comprises the following steps:

[0068] 1) Dissolve 8 mmol of manganese sulfate monohydrate and 8 mmol of ammonium thiosulfate in 70 ml of deionized water, and mix and stir for 30 minutes;

[0069] 2) Pour the solution obtained in step 1) into a 100ml reaction kettle, seal the reaction kettle well, and conduct a hydrothermal reaction at 120°C for 12 hours;

[0070] 3) Use deionized water and absolute ethanol to repeatedly centrifuge and wash the precipitate obtained in the step 2) hydrothermal reaction, and dry it in an oven at 70°C to obtain manganese oxide;

[0071] 4) Weighing 100 mg of step 3) The obtained manganese oxide nanorods are dispersed in 100 ml of 0.1 mol / L HCl solution, magnetically stirred for 1 hour, and the sample is acidified;

[0072] 5) The product obtained in step 4) was repeatedly washed with deionized water and ethanol until the pH value was 7;

[0073] 6) u...

Embodiment 3

[0085] The preparation method of one-dimensional manganese oxide / carbon coaxial hollow nanorod comprises the following steps:

[0086] 1) Dissolve 8 mmol of manganese sulfate monohydrate and 8 mmol of ammonium thiosulfate in 70 ml of deionized water, and mix and stir for 30 minutes;

[0087] 2) Pour the solution obtained in step 1) into a 100ml reaction kettle, seal the reaction kettle well, and conduct a hydrothermal reaction at 120°C for 12 hours;

[0088] 3) Use deionized water and absolute ethanol to repeatedly centrifuge and wash the precipitate obtained in the step 2) hydrothermal reaction, and dry it in an oven at 70°C to obtain manganese oxide;

[0089] 4) Weighing 100 mg of step 3) The obtained manganese oxide nanorods are dispersed in 100 ml of 0.1 mol / L HCl solution, magnetically stirred for 1 hour, and the sample is acidified;

[0090] 5) The product obtained in step 4) was repeatedly washed with deionized water and ethanol until the pH value was 7;

[0091] 6) u...

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Abstract

The invention relates to a one-dimensional manganese oxide / carbon coaxial hollow nanorod and a preparation method of the nanorod. The length of the nanorod is 2-3 microns; the diameter of the nanorod is 100-200nm; the thickness of carbon is 25-35nm; the thickness of a hollow structure is 10-20nm. The nanorod is prepared by the method which comprises the following steps: (1) dispersing a manganese oxide / silicon dioxide / carbon compound nanorod in a 1.0-2.0mol / L sodium hydroxide solution, stirring and uniformly mixing the solution; (2) slowly stirring the mixed solution obtained by the step (1) for 18-24 hours under the condition with a constant-temperature water bath at 70-90 DEG C; and (3) repeatedly washing a product obtained by the step (2) with water and absolute ethyl alcohol until the pH value is 7, and drying to obtain the one-dimensional manganese oxide / carbon coaxial hollow nanorod. The one-dimensional manganese oxide / carbon coaxial hollow nanorod has the beneficial effects of high specific capacity, high rate capability and high cycling stability, and can be used as a potential application material of a lithium ion battery.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials and electrochemistry, and specifically relates to a one-dimensional manganese oxide / carbon coaxial hollow nanorod and a preparation method thereof. The material can be used as a lithium ion battery negative electrode active material. Background technique [0002] As a green energy source, lithium-ion batteries have been used in portable electronic devices and electric vehicles. Research on high-capacity, miniaturized, high-power, and low-cost lithium-ion batteries based on new nano-heterostructures is the key to lithium-ion batteries in the current low-carbon economic era. One of the frontiers and hotspots of research. Since manganese oxide has a higher theoretical capacity than the currently widely used graphite, its theoretical specific capacity is as high as 960mAh / g, and it is considered to be one of the most potential negative electrode materials for lithium-ion batteries. Althou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/50H01M4/38H01M4/131H01M4/1391
CPCH01M4/1391H01M4/362H01M4/502H01M10/058Y02E60/10
Inventor 麦立强蔡正阳徐林晏梦雨
Owner WUHAN UNIV OF TECH
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