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A kind of preparation method of ni, sb-doped tricobalt tetroxide nano-oxide

A technology of cobalt trioxide nanometer and oxide, which is applied in the direction of cobalt oxide/cobalt hydroxide, electrochemical generators, structural parts, etc., which can solve the problems of poor ion and electronic conductivity, slow charge and discharge rate, large volume expansion, etc. Excellent chemical properties, improved electrical conductivity, and stable properties

Active Publication Date: 2018-11-16
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its poor ionic and electronic conductivity, resulting in a slow charge and discharge rate, and it is in the Li + Large volume expansion during embedding and emigration leads to electrode pulverization, resulting in a decrease in capacity

Method used

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  • A kind of preparation method of ni, sb-doped tricobalt tetroxide nano-oxide
  • A kind of preparation method of ni, sb-doped tricobalt tetroxide nano-oxide

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Experimental program
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Effect test

Embodiment 1

[0022] (1) Weigh 2.911 g of cobalt nitrate hexahydrate Co(NO 3)2 ·6H 2 O was dissolved in 108 ml of water, stirred to make it completely dissolved;

[0023] (2) Add 0.02g ammonium nitrate NH 4 NO 3 and 9.01g urea CO(NH 2 ) 2 , stirring to obtain a homogeneous and clear precursor solution;

[0024] (3) Add 0.02g nickel nitrate Ni(NO 3 ) 2 ·6H 2 O and 0.02 g antimony trichloride SbCl 3 , stirred to obtain a mixed solution;

[0025] (4) Put the mixed solution obtained above in a polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at 90°C, and the reaction time is 14 hours;

[0026] (5) After the reaction, the precipitate was washed with ethanol and distilled water in sequence, and dried at 90°C for 12 hours to obtain Ni, Sb-double-doped tricobalt tetroxide nano-oxide.

[0027] figure 1 Scanning electron micrographs of the composite material.

Embodiment 2

[0029] (1) Weigh 7.472 g of cobalt acetate Co(CH 3 COO) 2 4H 2 O was dissolved in 389 ml of water, stirred to make it completely dissolved;

[0030] (2) Add 5.556 g of ammonium fluoride NH 4 F and 21.622g urea CO(NH 2 ) 2 , stirring to obtain a homogeneous and clear precursor solution;

[0031] (3) Add 0.044g nickel nitrate Ni(NO 3 ) 2 ·6H 2 O and 0.023 g antimony trichloride SbCl 3 , stirred to obtain a mixed solution;

[0032] (4) Put the mixed solution obtained above in a polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at 150 °C for a reaction time of 5 hours;

[0033] (5) After the reaction, the precipitate was washed with ethanol and distilled water in sequence, and dried at 90°C for 12 hours to obtain Ni, Sb-double-doped tricobalt tetroxide nano-oxide.

[0034] figure 2 Scanning electron micrographs of the composite material.

Embodiment 3

[0036] (1) Weigh 4.366 g of cobalt nitrate hexahydrate Co(NO 3)2 ·6H 2 O was dissolved in 216 ml of water, stirred to make it completely dissolved;

[0037] (2) Add 0.241g of ammonium nitrate NH 4 NO 3 and 18.018 g urea CO(NH 2 ) 2 , stirring to obtain a homogeneous and clear precursor solution;

[0038] (3) Add 0.087g nickel nitrate Ni(NO 3 ) 2 ·6H 2 O and 0.011 g antimony trichloride SbCl 3 , stirred to obtain a mixed solution;

[0039] (4) Put the mixed solution obtained above in a polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at 120 °C for a reaction time of 5 hours;

[0040] (5) After the reaction, the precipitate was washed with ethanol and distilled water in sequence, and dried at 90°C for 12 hours to obtain Ni, Sb-double-doped tricobalt tetroxide nano-oxide.

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Abstract

The invention discloses a Ni and Sb co-doped cobaltosic oxide nano oxide. The method includes the following steps: dissolving cobaltate in water completely by stirring; adding a certain amount of ammonium salt and urea, and conducting stirring to obtain a uniform and clarified precursor solution; adding Ni(NO3)2.6H2O and SbCl3 in the precursor solution, and conducting stirring to obtain a mixed solution; placing the mixed solution in a teflon reactor, and conducting hydrothermal reaction at 90-150 DEG C for 5-14 hours; after the reaction, washing the obtained precipitate with ethyl alcohol and distilled water in sequence, and conducting drying at 90 DEG C for 12h to obtain the Ni and Sb co-doped cobaltosic oxide nano oxide. The Ni and Sb co-doped cobaltosic oxide nano oxide is high in stability and stable in property; not only the Ni and Sb co-doped cobaltosic oxide nano oxide has the excellent performance of cobalt oxide nano oxides, but also the conductivity of the Ni and Sb co-doped cobaltosic oxide nano oxide is improved based on the excellent performance. The method is easy to operate, the cost of the raw materials is low, the reaction temperature is low, the electrochemical property is excellent, and thus the Ni and Sb co-doped cobaltosic oxide nano oxide can be widely used in energy storage and other fields.

Description

technical field [0001] The invention relates to the field of preparation of nano-cobalt tetroxide oxides, in particular to a method for preparing in-situ dual doping of Ni and Sb metal elements in nano-cobalt tetroxide, and belongs to the technical field of nanocomposite materials. Background technique [0002] Increasing energy consumption has stimulated the need for more efficient energy conversion and storage devices such as rechargeable batteries that store electrical energy in chemical energy. Due to the advantages of high energy density, high output voltage and no environmental pollution, lithium-ion batteries have been used more and more widely. It has great application prospects in energy storage equipment such as new energy sources. The anode materials of lithium-ion batteries that have been commercially used are mainly graphene-based materials, but graphene has a low theoretical capacity and has certain safety issues. more and more attention. Generally speaking,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/48H01M4/139H01M10/0525C01G51/04
CPCC01G51/04H01M4/139H01M4/362H01M4/483H01M10/0525Y02E60/10
Inventor 何丹农王艳丽林琳张春明金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH