Preparation method of calcium-cobalt oxide compound as anode material for lithium ion batteries

A lithium-ion battery and anode material technology, which is applied in the field of lithium-ion battery anode materials and its preparation, can solve problems such as the adverse effects of lithium-ion battery materials, and achieve the effects of small and uniform size, high specific capacity, and excellent cycle performance

Inactive Publication Date: 2014-04-23
中国东方电气集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Another Chinese patent number is: CN201210112609.9 discloses a Ca 3 co 4 o 9 / Ag composite ceramic thermoelectric material preparation method, said method belongs to ceramic thermoelectric material field, it uses inorganic calcium salt and cobalt salt as reactant, in Ca 3 co 4 o 9 During the formation process or residual inorganic compounds, it has adverse effects on lithium-ion battery materials

Method used

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  • Preparation method of calcium-cobalt oxide compound as anode material for lithium ion batteries
  • Preparation method of calcium-cobalt oxide compound as anode material for lithium ion batteries

Examples

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Embodiment 1

[0024] Weigh 0.75mol Ca(CH 3 COO) 2 and 1mol Co(CH 3 COO) 2 , Weigh 2 mol of chelate citric acid, put the aforementioned reaction metal salt and chelate into a reaction vessel, add 4L of deionized water to dissolve the reactants. The mixed solution was stirred to a sol state under the stirring state, the stirring temperature was controlled at 80° C., and the stirring time was 5 h; after the stirring was completed, the sol was dried in an oven at 100° C. for 10 h to obtain a xerogel. The dry gel is pulverized and sintered in a high-temperature furnace. Pre-fire at 400°C for 24 hours, then heat up to 600°C and sinter for 4.5 hours to obtain Ca 3 co 4 o 9 finished product.

[0025] Will make Ca 3 co 4 o 9 The finished product is mixed with the conductive agent SuperP carbon black and the binder PVDF at a ratio of 70:20:10, and the organic solvent 1-methyl-2-pyrrolidone (NMP) is added as a solvent for stirring. After stirring evenly with a high-speed mixer, it is coated...

Embodiment 2

[0027] Weigh 0.375mol Ca(CH 3 COO) 2 and 0.5mol Co(CH 3 COO) 2 , Weigh 1 mol of chelate tartaric acid, put the reaction metal salt and chelate into a reaction vessel, add 1.5L deionized water to dissolve the reactants. The mixed solution was stirred to a sol state under the stirring state, the stirring temperature was controlled at 90° C., and the stirring time was 6 hours; after the stirring was completed, the sol was dried in an oven at 100° C. for 14 hours to obtain a xerogel. The dry gel is pulverized and sintered in a high-temperature furnace. Pre-fire at 450°C for 16 hours, then heat up to 700°C for 3 hours to obtain Ca 3 co 4 o 9 finished product.

[0028] Will make Ca 3 co 4 o 9 The finished product is mixed with the conductive agent SuperP carbon black and the binder PVDF at a ratio of 70:20:10, and the organic solvent 1-methyl-2-pyrrolidone (NMP) is added as a solvent for stirring. After stirring evenly with a high-speed mixer, it is coated on the surface ...

Embodiment 3

[0030] Weigh 0.375mol Ca(CH 3 COO) 2 and 0.5mol Co(CH 3 COO) 2 , Weigh 3 mol of the chelate gluconic acid, put the reaction metal salt and the chelate into a reaction vessel, and add 8L of deionized water to dissolve the reactant. The mixed solution was stirred to a sol state under the stirring state, the stirring temperature was controlled at 60° C., and the stirring time was 6 hours; after the stirring was completed, the sol was dried in an oven at 100° C. for 16 hours to obtain a xerogel. The dry gel is pulverized and sintered in a high-temperature furnace. Pre-fire at 350°C for 24 hours, then heat up to 650°C and sinter for 6 hours to obtain Ca 3 co 4 o 9 finished product.

[0031] Will make Ca 3 co 4 o 9 The finished product is mixed with the conductive agent SuperP carbon black and the binder PVDF at a ratio of 70:20:10, and the organic solvent 1-methyl-2-pyrrolidone (NMP) is added as a solvent for stirring. After stirring evenly with a high-speed mixer, it is...

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Abstract

The invention discloses a preparation method of a lamellar calcium-cobalt oxide compound as an anode material for lithium ion batteries. The method comprises the steps of dissolving reactants including Ca(CH3COO)2, Co(CH3COO)2 and a chelate to prepare a mixed solution, stirring the mixed solution till the mixed solution is in a sol state, drying the sol to obtain xerogel, and then grinding and sintering the xerogel to obtain a finished product Ca3Co4O9. The prepared material is uniform in grains, has high specific capacity and has good charge and discharge efficiency.

Description

technical field [0001] The invention relates to a lithium ion battery anode material and a preparation method thereof, in particular to a preparation method of a lithium ion battery anode material calcium cobalt oxygen layered compound. Background technique [0002] With the development of human science and technology, the consumption and dependence on energy are increasing, and the damage to the environment is also increasing. The storage and conversion of energy plays an increasingly important role in making full use of the earth's resources and improving the human ecological environment. As an important way of energy storage and conversion, chemical power sources have been widely used in human daily life. Lithium-ion batteries occupy an important position in electric vehicles, energy storage applications, and portable electronic devices due to their advantages such as high energy density, long life, and no memory effect. [0003] With the increasing demand for lithium-i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1391
CPCY02E60/122H01M4/1391H01M4/48H01M4/52H01M10/0525H01M2004/028Y02E60/10
Inventor 梁孜李明科王睿郑威
Owner 中国东方电气集团有限公司
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