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Preparation method of Si@SnO2@C microspheres used as positive electrode material of high-temperature lithium battery

A high-temperature lithium battery and positive electrode material technology, which is applied in the direction of battery electrodes, lithium batteries, positive electrodes, etc., can solve the problems of low conductivity of high-temperature lithium batteries and capacity attenuation of high-temperature lithium batteries, and achieve good intrinsic electronic conductivity and enhanced Conductivity and the effect of preventing capacity fading

Inactive Publication Date: 2020-11-24
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem that the capacity of the high-temperature lithium battery is easy to rapidly decay and the conductivity of the high-temperature lithium battery is weak when simple silicon is used as the positive electrode material of the high-temperature lithium battery, the present invention provides a Si@SnO used as the positive electrode material of the high-temperature lithium battery 2 Preparation method of @C microspheres

Method used

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  • Preparation method of Si@SnO2@C microspheres used as positive electrode material of high-temperature lithium battery
  • Preparation method of Si@SnO2@C microspheres used as positive electrode material of high-temperature lithium battery
  • Preparation method of Si@SnO2@C microspheres used as positive electrode material of high-temperature lithium battery

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Embodiment 1

[0032] A Si@SnO used as a cathode material for high-temperature lithium batteries 2 The preparation method of @C microspheres, the method is realized by the following steps:

[0033] 1) Perform surface activation treatment on silicon powder to obtain activated silicon powder;

[0034] 2) Weigh 0.2g of activated silicon powder, add the activated silicon powder into 80mL of deionized water, and disperse it ultrasonically for 30min to obtain solution A;

[0035] 3) Weigh 0.4g of glucose, add glucose into solution A, stir vigorously for 10min, and obtain solution B;

[0036] 4) Add 0.28g of stannous chloride and 0.04g of ammonium fluoride to solution B, and stir vigorously for 20min to obtain a precursor suspension;

[0037] 5) Transfer the precursor suspension to a 100mL polytetrafluoroethylene reactor, conduct a hydrothermal reaction at a reaction temperature of 160°C for 16 hours, then cool to room temperature, and collect the precipitate;

[0038] 6) After cleaning and dryi...

Embodiment 2

[0052] A Si@SnO used as a cathode material for high-temperature lithium batteries 2 The preparation method of @C microspheres, the method is realized by the following steps:

[0053] 1) Perform surface activation treatment on silicon powder to obtain activated silicon powder;

[0054] 2) Weigh 0.4g of activated silicon powder, add the activated silicon powder into 80mL of deionized water, and disperse it ultrasonically for 30 minutes to obtain solution A;

[0055] 3) Weigh 1.2g of glucose, add glucose into solution A, stir vigorously for 10min, and obtain solution B;

[0056] 4) Add 0.5g of stannous chloride and 0.09g of ammonium fluoride to solution B, and stir vigorously for 30min to obtain a precursor suspension;

[0057] 5) Transfer the precursor suspension to a 100mL polytetrafluoroethylene reactor, conduct a hydrothermal reaction at a reaction temperature of 200°C for 36 hours, then cool to room temperature, and collect the precipitate;

[0058] 6) After cleaning and ...

Embodiment 3

[0072] A Si@SnO used as a cathode material for high-temperature lithium batteries 2 The preparation method of @C microspheres, the method is realized by the following steps:

[0073] 1) Perform surface activation treatment on silicon powder to obtain activated silicon powder;

[0074] 2) Weigh 0.25g of activated silicon powder, add activated silicon powder into 80mL of deionized water, and disperse by ultrasonic for 30min to obtain solution A;

[0075] 3) Weigh 0.6g of glucose, add glucose into solution A, stir vigorously for 10min, and obtain solution B;

[0076] 4) Add 0.36g of stannous chloride and 0.05g of ammonium fluoride to solution B, and stir vigorously for 24min to obtain a precursor suspension;

[0077] 5) Transfer the precursor suspension to a 100mL polytetrafluoroethylene reactor, conduct a hydrothermal reaction at a reaction temperature of 175°C for 20 hours, then cool to room temperature, and collect the precipitate;

[0078] 6) Clean and dry the collected pr...

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Abstract

The invention relates to a high-temperature lithium battery, in particular to a preparation method of Si@SnO2@C microspheres serving as a positive electrode material of a high-temperature lithium battery, and solves the problems that the capacity of the high-temperature lithium battery is easily and quickly attenuated and the conductivity of the high-temperature lithium battery is weaker when monatomic silicon is used as a positive electrode material of the high-temperature lithium battery. The invention relates to the preparation method of the Si@SnO2@C microspheres used as the positive electrode material of the high-temperature lithium battery. The method is realized by adopting the following steps: (1) carrying out surface activation treatment on silicon powder; 2) adding the activatedsilicon powder into 80mL of deionized water; 3) adding glucose into a solution A; (4) adding 0.28-0.5 g of stannous chloride and 0.04-0.09 g of ammonium fluoride into a solution B, (5) transferring aprecursor suspension into a 100mL polytetrafluoroethylene reaction kettle; and (6) cleaning and drying a collected precipitate, and putting the precipitate into a tubular furnace.

Description

technical field [0001] The invention relates to a high-temperature lithium battery, specifically a Si@SnO used as a high-temperature lithium battery positive electrode material 2 Preparation method of @C microspheres. Background technique [0002] High-temperature lithium batteries are widely used in military industry, oil and gas exploration, geothermal mining and other fields. They have the advantages of large discharge power, stable storage life, good safety performance, and strong environmental adaptability. In high-temperature lithium batteries, the cathode material is the key material to improve the battery voltage, specific capacity and specific power. At present, elemental silicon is regarded as a promising electrode material. However, practice has shown that the following problems exist when elemental silicon is used as the positive electrode material of high-temperature lithium batteries: First, during the discharge process of high-temperature lithium batteries, ...

Claims

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Application Information

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IPC IPC(8): H01M4/38H01M4/62H01M10/052
CPCH01M4/386H01M4/625H01M4/628H01M10/052H01M2004/028Y02E60/10
Inventor 赵宇宏张妍妍牛永强曹津铭任敬霞田晋忠侯华
Owner ZHONGBEI UNIV
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