High specific capacity spindle-shaped ferroferric oxide/carbon nano composite material for negative electrode of lithium ion battery

A technology of triiron tetroxide and lithium ion batteries, which is applied in battery electrodes, circuits, electrical components, etc., to achieve the effects of simple and easy operation, low price, and overcoming low Coulomb efficiency

Inactive Publication Date: 2012-08-01
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing synthetic methods, the method of obtaining the fusiform ferric oxide / carbon nanocomposites with similar morphology by first adjusting the morphology of the precursor and then undergoing carbothermal reduction has not been reported.

Method used

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  • High specific capacity spindle-shaped ferroferric oxide/carbon nano composite material for negative electrode of lithium ion battery
  • High specific capacity spindle-shaped ferroferric oxide/carbon nano composite material for negative electrode of lithium ion battery
  • High specific capacity spindle-shaped ferroferric oxide/carbon nano composite material for negative electrode of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Mix glycerol and distilled water in a volume ratio of 1:4 as a solvent, add soluble iron salt to the solvent in a ratio of 3 mmol: 40 mL, and stir magnetically for 25 minutes to make the iron salt completely dissolved;

[0031] (2) Transfer the solution prepared in step (1) to a reaction kettle with a polytetrafluoroethylene liner, and place it in an oven at 120° C. for 12 hours;

[0032] (3) The reaction kettle is naturally cooled to room temperature, then the product is separated by suction filtration, washed 5 times with distilled water and absolute ethanol respectively, and dried in an oven at 100° C. to obtain an orange-yellow ferric oxyhydroxide (FeOOH) solid that is Fusiform ferric oxyhydroxide precursor;

[0033] (4) According to the mass ratio of glucose and ferric oxyhydroxide being 5:1, weigh glucose and ferric oxyhydroxide prepared in step (3) respectively, ultrasonically disperse them in distilled water for 30min, and then transfer Put in a hydrother...

Embodiment 2

[0037] (1) Glycerol and distilled water are mixed as a solvent in a ratio of 1:3 by volume, and soluble iron salt is added to the solvent in a ratio of 7 mmol: 40 mL of soluble iron salt and solvent, and magnetically stirred for 25 minutes to make the iron salt completely dissolved;

[0038] (2) Transfer the solution prepared in step (1) to a reaction kettle with a polytetrafluoroethylene liner, and place it in an oven at 160° C. for 12 hours;

[0039] (3) The reaction kettle is naturally cooled to room temperature, then the product is separated by suction filtration, washed 5 times with distilled water and absolute ethanol respectively, and dried in an oven at 100° C. to obtain an orange-yellow ferric oxyhydroxide (FeOOH) solid that is Fusiform ferric oxyhydroxide precursor;

[0040] (4) According to the mass ratio of glucose and ferric oxyhydroxide being 7:1, weigh glucose and ferric oxyhydroxide prepared in step (3) respectively, ultrasonically disperse them in distilled ...

Embodiment 3

[0044] (1) Glycerol and distilled water are mixed in a ratio of 1:5 by volume as a solvent, and soluble iron salt is added to the solvent in a ratio of 5 mmol: 40 mL according to the ratio of soluble iron salt and solvent, and magnetically stirred for 25 minutes to make the iron salt completely dissolved;

[0045] (2) Transfer the solution prepared in step (1) to a reaction kettle with a polytetrafluoroethylene liner, and place it in an oven at 150° C. for 15 hours;

[0046] (3) The reaction kettle is naturally cooled to room temperature, then the product is separated by suction filtration, washed 5 times with distilled water and absolute ethanol respectively, and dried in an oven at 100° C. to obtain an orange-yellow ferric oxyhydroxide (FeOOH) solid that is Fusiform ferric oxyhydroxide precursor;

[0047] (4) According to the mass ratio of glucose and ferric oxyhydroxide being 8:1, weigh glucose and ferric oxyhydroxide prepared in step (3) respectively, ultrasonically disp...

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Abstract

The invention discloses a high specific capacity spindle-shaped ferroferric oxide/carbon nano composite material for a negative electrode of a lithium ion battery. A raw material, namely soluble ferric salt is solved in a mixed solvent of glycerol and distilled water; after low-temperature treatment, precipitates are collected, and a spindle-shaped iron oxide hydroxide (FeOOH) precursor is obtained; and after the precursor is subject to carbothermal reduction, the ferroferric oxide/carbon nano composite material with the same appearance is obtained. The invention discloses a preparation method of the spindle-shaped ferroferric oxide/carbon, which has the advantages that the operation is simple, convenient and simple to do, the used raw material has a cheap price, mass production is facilitated, and the synthetized spindle-shaped ferroferric oxide/carbon nano composite material shows high first time coulomb efficiency and high specific capacity when being used as the negative electrode of the lithium ion battery, and is a promising negative electrode material of the lithium ion battery.

Description

technical field [0001] The invention relates to a shuttle-shaped iron ferric oxide / carbon composite material used for the negative electrode of a lithium-ion battery with high energy density; it belongs to the field of preparation of nanometer materials and application of lithium-ion batteries. Background technique [0002] One of the keys to the development of lithium-ion batteries is to find suitable electrode materials, so that the battery has a high enough lithium intercalation capacity and good lithium deintercalation reversibility, so as to ensure the large capacity and long cycle life of lithium-ion batteries, thereby promoting lithium Applications of ion batteries in electric vehicles, smart grids, etc. [0003] As early as the late 1980s, metal oxides such as TiO 2 , W 2 o 3 , SnO 2 have been shown to have reversible lithium storage properties. Later, the French Tarascon group (Nature, 2000, 407, 496.) found that nanostructured transition metal oxides MOx (M=Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/52
CPCY02E60/12Y02E60/10
Inventor 沈强徐纷纷康文裴赵陈浩
Owner SHANDONG UNIV
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