Chrysanthemum-shaped cobaltosic oxide (Co3O4) material and preparation method and application thereof

A technology of chrysanthemum and negative electrode materials, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of particle agglomeration and poor cycle stability, and achieve the effects of good electrochemical stability, increased structural specific surface area, and improved rate characteristics.

Inactive Publication Date: 2012-01-25
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent focuses on Co 3 o 4 The size of the material and the chrysanthemum-like morphology of the micro-nano structure affect the electrochemical behavior, and then solve the Co 3 o 4 Particle agglomeration and poor cycle stability of materials during charge and discharge

Method used

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  • Chrysanthemum-shaped cobaltosic oxide (Co3O4) material and preparation method and application thereof
  • Chrysanthemum-shaped cobaltosic oxide (Co3O4) material and preparation method and application thereof
  • Chrysanthemum-shaped cobaltosic oxide (Co3O4) material and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0060] Take 1.47 g cobalt nitrate (Co(NO 3 ) 2 6H 2 O, analytically pure, Sinopharm Chemical Reagent Company), 1.2g urea (Co(NH 2 ) 2 , analytically pure, Shanghai Jiuyi Chemical Reagent Co., Ltd.), 1g cetyltrimethylammonium bromide (CTAB, analytically pure, Shanghai Chemical Reagent Company) was dissolved in 1.5ml of n-amyl alcohol (C 5 h 12 O, analytically pure, Sinopharm Chemical Reagent Company), 30ml cyclohexane (C 6 h 12 , analytically pure, Sinopharm Group Chemical Reagent Company) and 27 ml of deionized water, the molar ratio of cobalt salt, precipitant, surfactant, and water in the solvent is 1.82:1:7.27:545.45, and the whole The process was carried out under magnetic stirring (81-2 type, Shanghai Sile Instrument Co., Ltd.). After stirring for 30 minutes, move the entire mixed solution into a polytetrafluoroethylene-lined autoclave (100ml, Zhengxin Instrument Factory) with a filling degree of 60%, react at a certain temperature (95°C) for 7.5 hours, and then ...

Embodiment 2

[0065] Take 1.47 g cobalt nitrate (Co(NO 3 ) 2 6H 2 O, analytically pure, Sinopharm Chemical Reagent Company), 1.2g urea (Co(NH 2 ) 2 , analytically pure, Shanghai Jiuyi Chemical Reagent Co., Ltd.), 1g cetyltrimethylammonium bromide (CTAB, analytically pure, Shanghai Chemical Reagent Company) was dissolved in 1.5ml of n-amyl alcohol (C 5 h 12 O, analytically pure, Sinopharm Chemical Reagent Company), 30ml cyclohexane (C 6 h 12 , analytically pure, Sinopharm Group Chemical Reagent Company) and 47ml of deionized water in the mixed solution, the molar ratio of cobalt salt, precipitant, surfactant, and water in the solvent is 1.82:1:7.27:949.09, the whole adding process It was carried out under magnetic stirring (81-2 type, Shanghai Sile Instrument Co., Ltd.). After stirring for 30 minutes, move the entire mixed solution into a polytetrafluoroethylene-lined autoclave (100ml, Zhengxin Instrument Factory) with a filling degree of 80%, react at a certain temperature (105°C) ...

Embodiment 3

[0070] Take 1.47 g cobalt nitrate (Co(NO 3 ) 2 6H 2 O, analytically pure, Sinopharm Chemical Reagent Company), 1.2g urea (Co(NH 2 ) 2 , analytically pure, Shanghai Jiuyi Chemical Reagent Co., Ltd.), 1g cetyltrimethylammonium bromide (CTAB, analytically pure, Shanghai Chemical Reagent Company) was dissolved in 1.5ml of n-amyl alcohol (C 5 h 12 O, analytically pure, Sinopharm Chemical Reagent Company), 30ml cyclohexane (C 6 h 12 , analytically pure, Sinopharm Group Chemical Reagent Company) and 42ml of deionized water in the mixed solution, the molar ratio of cobalt salt, precipitant, surfactant, and water in the solvent is 1.82:1:7.27:848.48, the whole adding process It was carried out under magnetic stirring (81-2 type, Shanghai Sile Instrument Co., Ltd.). After stirring for 30 minutes, move the entire mixed solution into a polytetrafluoroethylene-lined autoclave (100ml, Zhengxin Instrument Factory) with a filling degree of 75%, react at a certain temperature (100°C) ...

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Abstract

The invention discloses a chrysanthemum-shaped cobaltosic oxide (Co3O4) material and a preparation method and application thereof. The preparation method comprises the following steps of: mixing cobalt salt, a surface active agent, a precipitating agent and a solvent in a stoichiometric ratio; putting a mixed solution into a reaction kettle and performing hydro-thermal reaction at the temperature of 95 to 105 DEG C for 7.5 to 8.5 h; washing and drying, and thus obtaining a powdery mixed precursor; and performing heat treatment on the powdery mixed precursor in air, and thus obtaining the chrysanthemum-shaped Co3O4 material. The obtained chrysanthemum-shaped Co3O4 material has better electrochemical performance and is applicable to a cathode of a rechargeable lithium ion battery.

Description

Technical field [0001] The invention involves a CO for the negative material for lithium -ion batteries 3 O 4 Chrysanthemum -like materials and their preparation methods. technical background [0002] CO 3 O 4 It is a typical P -shaped semiconductor material, which has good electrochemical behavior and higher ratio capacity.As a new type of lithium -ion battery negative material, CO 3 O 4 Get a wide range of research.There are many ways to prepare CO in existing technologies now 3 O 4 Spray hot solution [7].The above -mentioned various methods prepare a micro -nano -structure CO of nano -needle, nano tube, nanobube cube 3 O 4 The electrode material is mainly for CO 3 O 4 The electrode material structure is nanogenic to improve its lithium storage performance. However, the shortcomings caused by poor circulation stability caused by the regimen of particles during the charging process of the material need to be resolved.The present invention provides a new micro -nano -structure ch...

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 刘艳武英
Owner SHANGHAI INST OF TECH
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