Cathode material for non-aqueous secondary battery and preparation method thereof as well as non-aqueous secondary battery cathode and non-aqueous secondary battery

A technology for non-aqueous secondary batteries and negative electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of poor cycle performance of high-capacity alloy negative electrode materials, and achieve poor cycle performance, good cycle characteristics, and high reversibility. The effect of specific capacity

Active Publication Date: 2013-03-13
SUZHOU UNIV
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Problems solved by technology

[0006] In view of this, the object of the present invention is to provide a kind of negative electrode material for nonaqueous secondary battery and preparation method thereof, nonaqueous secondary battery negative pole and nonaqueous secondary battery, by preparing cobalt stannate with mesoporous structure CoSnO3 nanoparticle clusters, combined with a new carbon coating process, fundamentally solve the problem of poor cycle performance of high-capacity alloy anode materials

Method used

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  • Cathode material for non-aqueous secondary battery and preparation method thereof as well as non-aqueous secondary battery cathode and non-aqueous secondary battery
  • Cathode material for non-aqueous secondary battery and preparation method thereof as well as non-aqueous secondary battery cathode and non-aqueous secondary battery
  • Cathode material for non-aqueous secondary battery and preparation method thereof as well as non-aqueous secondary battery cathode and non-aqueous secondary battery

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preparation example Construction

[0036] ginseng figure 1 As shown, the present invention also discloses a preparation method of a negative electrode material for a non-aqueous secondary battery, comprising:

[0037] S1. Add the tin source solution dropwise to the cobalt source solution, and use the solution precipitation method to prepare the precursor material CoSn(OH) 6 ;

[0038] S2, the precursor material CoSn (OH) 6 Calcined under an inert atmosphere to obtain CoSnO 3 nanoparticle clusters;

[0039] S3, the CoSnO 3 Carbon-coated CoSnO was prepared by hydrothermal carbon coating of nanoparticle clusters in a soluble sugar solution 3 nanoparticle clusters;

[0040] S4, the carbon coated CoSnO 3 Carbon-coated CoSnO with mesoporous structure obtained by calcination of nanoparticle clusters under inert atmosphere 3 nanoparticle clusters.

[0041] Preferably, the tin source solution in step S1 of the present invention is an aqueous solution of sodium stannate, the cobalt source solution is an aqueous ...

Embodiment 1

[0057] S1. Add 0.1 mol / L sodium stannate aqueous solution dropwise to 0.1 mol / L cobalt sulfate aqueous solution under vigorous stirring. After the reaction was completed, the stirring was continued for 30 min. Centrifuge the obtained precipitate, wash it with deionized water several times, and then dry the obtained precipitate at 80-110°C for 10 hours to obtain the precursor material CoSn(OH) 6 ;

[0058] S2, the above precursor material CoSn (OH) 6 Sintering at a constant temperature of 300-600°C for 2-6h under an inert atmosphere to obtain CoSnO 3 nanoparticle clusters;

[0059] S3, weigh a certain amount of CoSnO 3 Put in the hydrothermal liner of polytetrafluoroethylene, add a certain amount of 0.25mol / L glucose solution, stir for 0.5-2h and ultrasonic treatment for 10-60min, then transfer to a stainless steel hydrothermal tank, keep the temperature at 120-200℃ for 2- 24h. After natural cooling, the obtained sample was filtered, washed several times with deionized wa...

Embodiment 2

[0062] S1. Add 0.1 mol / L sodium stannate aqueous solution dropwise to 0.1 mol / L cobalt sulfate aqueous solution under vigorous stirring. After the reaction was completed, the stirring was continued for 30 min. Centrifuge the obtained precipitate, wash it with deionized water several times, and then dry the obtained precipitate at 80-110°C for 10 hours to obtain the precursor material CoSn(OH) 6 ;

[0063] S2, the above precursor material CoSn (OH) 6 Sintering at a constant temperature of 300-600°C for 2-6h under an inert atmosphere to obtain CoSnO 3 nanoparticle clusters;

[0064] S3, weigh a certain amount of CoSnO 3 Put in the hydrothermal lining of polytetrafluoroethylene, add a certain amount of 0.35mol / L glucose solution, stir for 0.5-2h and ultrasonic treatment for 10-60min, then transfer to a stainless steel hydrothermal tank, keep the temperature at 120-200℃ for 2- 24h. After natural cooling, the obtained sample was filtered, washed several times with deionized w...

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Abstract

The invention discloses a cathode material for a non-aqueous secondary battery and a preparation method thereof as well as a non-aqueous secondary battery cathode and a non-aqueous secondary battery. The cathode material is made of a carbon-covering cobaltous stannate material with a mesoporous structure. The preparation method comprises the following steps of: dropwise adding a tin source solution into a cobalt source solution, and using a solution sediment method to prepare a precursor material; forging the precursor material under an inert atmosphere so as to obtain a cobaltous stannate nanometer particle group; placing the cobaltous stannate nanometer particle group in a soluble sugary solution, and manufacturing a carbon-covering cobaltous stannate nanometer particle group through hydrothermal carbon covering; and forging the carbon-covering cobaltous stannate nanometer particle group under the inert atmosphere, so as to obtain the carbon-covering cobaltous stannate nanometer particle group with the mesoporous structure. The preparation method provided by the invention can obtain a carbon-covering cobaltous stannate cathode material with a certain mesoporous structure by using a simple and convenient precipitation method and a hydrothermal method, so that not only can the material cost be reduced, but also the defects of poor circulation property and the like of a tin-based cathode can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of non-aqueous secondary batteries, in particular to a negative electrode material for a non-aqueous secondary battery and a preparation method thereof, a negative electrode of a non-aqueous secondary battery and a non-aqueous secondary battery. Background technique [0002] With the rapid consumption of resources and increasingly severe climate anomalies, people's demand for clean and renewable energy is increasing day by day. Lithium-ion secondary batteries belong to the field of clean energy. They have the characteristics of good safety, good cycle performance, long cycle life, non-toxic and harmless, etc. At present, they have become the standard power supply for mobile phones, tablet computers, notebook computers, digital cameras and other products. In the future, it is also expected to be used as a large-scale power supply and a large-scale energy storage power supply. [0003] With the continuous exp...

Claims

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Application Information

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IPC IPC(8): H01M4/485H01M4/62H01M4/131
CPCY02E60/122Y02E60/10
Inventor 李德成方国清刘伟伟孙洪丹夏炳波王海波吴晶晶
Owner SUZHOU UNIV
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