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Solvent-free synthesis method and application of cobaltosic oxide

A technology of cobalt tetroxide and synthesis method, which is applied in the direction of cobalt oxide/cobalt hydroxide, electrochemical generator, material electrochemical variables, etc., can solve the problems such as no solvent-free synthesis method of cobalt tetroxide reported, and achieve good gas-sensing performance and low cost , The effect of simple process

Inactive Publication Date: 2020-03-17
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Tricobalt tetroxide has not yet seen the report of solvent-free synthesis method

Method used

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  • Solvent-free synthesis method and application of cobaltosic oxide
  • Solvent-free synthesis method and application of cobaltosic oxide

Examples

Experimental program
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Embodiment 1

[0030] Embodiment 1 is the solvent-free low-temperature synthesis of tricobalt tetroxide, comprising the following steps:

[0031] Step 1, weigh 1g of cobalt acetate and 0.2% of NaOH solid, place them in an agate mortar with a diameter of 6cm, and grind them thoroughly for 5 to 10 minutes.

[0032] Step 2, transfer the black solid mixture obtained in step 1 into a 50mL tetrafluoroethylene liner with a stainless steel jacket, tighten it and transfer it to a blast drying oven, place it at 80°C for 10h, take it out and cool it, the product is white After solid, the product is filtered, fully washed with water, and dried at 60°C to obtain the product tricobalt tetroxide.

[0033] The XRD diffraction pattern of the cobalt tetroxide synthesized in Example 1 and the XRD diffraction pattern of the standard cobalt tetroxide (JCPDS#43-1003) are shown in figure 1 ,Depend on figure 1 It can be seen that the XRD peak position of the cobalt tetroxide obtained in Example 1 is consistent wi...

Embodiment 2

[0035] Embodiment 2 is the solvent-free high-temperature synthesis of tricobalt tetroxide, comprising the following steps:

[0036] Step 1, weigh 1.0g of cobalt sulfate heptahydrate and 0.3g of NaOH solid, place them in an agate mortar with a diameter of 6cm, grind them thoroughly for 5-10 minutes,

[0037] Step 2, transfer the white solid mixture obtained in step 1 into a 50mL tetrafluoroethylene liner with a stainless steel jacket, tighten it and transfer it to a blast drying oven, place it at 150°C for 2 hours, take it out and cool it, the product is white After solid, the product is filtered, fully washed with water, and dried at 60°C to obtain the product tricobalt tetroxide.

[0038] The cobalt tetroxide synthesized by the solvent-free method in Example 1 was ultrasonically dispersed in ethanol, evenly spread on the gas-sensing test electrode, and then dried at 60°C for 30 minutes, and respectively tested for 100ppm of hydrogen, methanol, 10000ppm of methane, and 10ppm o...

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Abstract

The invention relates to a solvent-free synthesis method and application of cobaltosic oxide. A divalent cobalt source and an alkali source are fully mixed through a solid-phase grinding method, thenthe mixture is stood and heated to form the cobaltosic oxide; the solvent-free synthesis method has characteristics of no use of any solvent, relatively mild operation temperature, high synthesis space-time efficiency, good gas sensitivity to acetone, toluene and other gases; in addition, the cobaltosic oxide synthesized by the solvent-free method has high capacitance density, and has good prospect in application of a battery negative electrode material.

Description

technical field [0001] The invention discloses a solvent-free synthesis method of tricobalt tetroxide and its application, and relates to the field of synthesis and application of tricobalt tetroxide. Background technique [0002] Cobalt tetraoxide is a semiconductor material with a wide bandgap, and the bandgap is 2.1eV, which can be used for lithium-ion batteries (Mater.Res.Bull., 1997, 32, 9-14), gas sensors (Sens.Actuators, B ,2010,146,183-189), super capacitor (J.Power Sources,2010,195,1757-1760), magnetic material (J.Magn.Magn.Mater.,2002,246,184-190), heterogeneous catalyst (Chem. Mater., 2002, 14, 3090-3099) and other fields. [0003] In addition to the potential applications in the above aspects, cobalt tetroxide also has great application prospects in lithium-ion battery anode materials. At present, the widely used commercial graphite-based carbon anode materials have good cycle performance, but their specific capacity (300-350mA·h / g) is low, which cannot meet th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04H01M4/52H01M10/0525G01N27/30
CPCC01G51/04C01P2002/72C01P2004/03C01P2006/40G01N27/30H01M4/523H01M10/0525H01M2004/027Y02E60/10
Inventor 季澎章伟田仁兵郑华张耿张绍强胡君刘敏霞李仪
Owner DONGGUAN UNIV OF TECH
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