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SnO2 nanorod for negative electrode of lithium ion battery, and preparation method of SnO2 nanorod

A lithium-ion battery and nanorod technology, applied in battery electrodes, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as high production cost, reaction cycle of cyclohexane toxic substances, and restrictions on wide application , to achieve the effect of short cycle, improved cycle stability and specific capacity, and increased transmission rate

Active Publication Date: 2016-09-07
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent publication No. CN 1052364712 A published in January 2016 discloses a method for preparing tin dioxide nanorods with a controllable aspect ratio. The method uses cyclohexane as a solvent and reacts by solvothermal method, but Cyclohexane is a toxic substance and the reaction cycle is long, which limits the wide application of this method
Although the method is simple in steps, sulfur is a toxic substance, and the production cost is high with absolute ethanol as a solvent (Lei D, Zhang M, Qu B, et al.Hierarchical tin-based microspheres: Solvothermal synthesis, chemical conversion, mechanism and application in lithiumion batteries[J].Electrochimica Acta,2013,106:386-391)

Method used

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  • SnO2 nanorod for negative electrode of lithium ion battery, and preparation method of SnO2 nanorod
  • SnO2 nanorod for negative electrode of lithium ion battery, and preparation method of SnO2 nanorod
  • SnO2 nanorod for negative electrode of lithium ion battery, and preparation method of SnO2 nanorod

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Experimental program
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Effect test

Embodiment 1

[0026] (1) 0.451g SnCl 2 2H 2 O was added to 40mL deionized water and stirred for 5min until the SnCl 2 2H 2 O is completely dissolved to obtain a milky white solution. Add 0.05 g of super P with a particle size of 30-40 nm to the milky white solution, and then ultrasonically treat it for 20 minutes at a power of 80 W and a temperature of 30 ° C to make super P and Sn 2+ Fully function to obtain a uniform mixed solution, the Sn in the mixed solution 2+ The concentration is 0.05mol L -1 .

[0027] (2) Transfer the mixed solution to the hydrothermal reaction kettle, the filling degree of the reaction kettle is 60%, put the hydrothermal reaction kettle into the MDS-10 high-throughput ultra-high pressure sealed microwave digestion instrument; select the temperature control mode to react, The temperature control mode is as follows: the reaction temperature is 120° C., the reaction time is 10 minutes, and the reaction is naturally cooled to room temperature after the reaction i...

Embodiment 2

[0031] (1) 0.846g SnCl 2 2H 2 O was added to 50mL deionized water, stirred for 5min until the SnCl 2 2H 2 O is completely dissolved to obtain a milky white solution. Add 0.1 g of super P with a particle size of 30 to 40 nm to the milky white solution, and then ultrasonically treat it for 20 minutes at a power of 80 W and a temperature of 50 ° C to make super P and Sn 2+ Fully function to obtain a uniform mixed solution, the Sn in the mixed solution 2+ The concentration is 0.075mol L -1 .

[0032] (2) Transfer the mixed solution to the hydrothermal reaction kettle, the filling degree of the reaction kettle is 80%, put the hydrothermal reaction kettle into the MDS-10 high-throughput ultra-high pressure sealed microwave digestion instrument; select the temperature control mode to react, The temperature control mode is as follows: the reaction temperature is 120°C, the reaction time is 20 minutes, and it is naturally cooled to room temperature after the reaction is completed....

Embodiment 3

[0037] (1) 1.128g SnCl 2 2H 2 O was added to 80mL deionized water, stirred for 5min until the SnCl 2 2H 2 O is completely dissolved to obtain a milky white solution. Add 0.2 g of super P with a particle size of 30 to 40 nm to the milky white solution, and then ultrasonically treat it for 20 minutes at a power of 100 W and a temperature of 50 ° C to make super P and Sn 2+ Fully function to obtain a uniform mixed solution, the Sn in the mixed solution 2+ The concentration is 0.062mol L -1 .

[0038] (2) Transfer the mixed solution to the hydrothermal reaction kettle, the filling degree of the reaction kettle is 70%, put the hydrothermal reaction kettle into the MDS-10 high-throughput ultra-high pressure sealed microwave digestion instrument; select the temperature control mode to react, The temperature control mode is as follows: the reaction temperature is 150°C, the reaction time is 20 minutes, and it is naturally cooled to room temperature after the reaction is completed...

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Abstract

The invention relates to a SnO2 nanorod for a negative electrode of a lithium ion battery, and a preparation method of the SnO2 nanorod. The preparation method comprises the following steps of: adding SnCl2*2H2O into deionized water to obtain milky solution, and performing ultrasonic treatment after adding super P into the milky solution so as to obtain uniform mixed solution; performing microwave hydrothermal reaction of the mixed solution to obtain a SnO2 / super P composite material; and sintering the SnO2 / super P composite material so as to obtain the SnO2 nanorod. According to the SnO2 nanorod for the negative electrode of the lithium ion battery, and the preparation method of the SnO2 nanorod disclosed by the invention, the super P is used as a template; the structure of a nano material can be controlled to a certain degree, such that aggregation of the nano material is inhibited; compared with the conventional hydrothermal method, a microwave hydrothermal method has the advantages that: microwave is used as a heating tool; stirring in a molecular level is realized; the non-uniform heating disadvantage of a hydrothermal container is overcome; the reaction time is shortened; the working efficiency is increased; and the nano material having complete crystallization and uniform particle size distribution can be prepared; and furthermore, the method is simple to operate, short in period and low in cost, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to a preparation method of a negative electrode material of a lithium ion battery, in particular to a SnO used for a negative electrode of a lithium ion battery 2 Nanorods and methods for their preparation. Background technique [0002] Tin dioxide (SnO 2 ) due to the theoretical capacity (782mAhg -1 ), low cost, low toxicity and wide practicability, it is considered to be one of the most potential anode materials for lithium-ion batteries. However, during the alloying and dealloying (intercalation and extraction) process of tin oxide with lithium ions, a large volume deformation will occur, which will lead to the gradual pulverization of the electrode material and the rapid loss of capacity. [0003] Studies have shown that adjusting the structure of materials can change the properties of materials. For example, making materials one-dimensional will reduce the dimensionality and structure size of materials, and can present nov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M10/0525C01G19/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G19/02H01M4/483H01M10/0525Y02E60/10
Inventor 黄剑锋席乔程娅伊李嘉胤曹丽云许占位郭玲齐慧
Owner SHAANXI UNIV OF SCI & TECH
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