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A foam conductive network/silicon dioxide preparation device and control method

A technology of silicon dioxide and preparation device, which is applied in the field of electrochemical power supply, and achieves the effects of reducing preparation process steps, reducing environmental pollution and improving electrochemical performance

Active Publication Date: 2022-01-28
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few literature reports on the preparation device and control method of tetraethyl orthosilicate (TEOS) hydrolysis to prepare conductive material / silicon negative electrode

Method used

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  • A foam conductive network/silicon dioxide preparation device and control method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A foam conductive net / silicon dioxide preparation device, including a transmission system, a reaction system, and a collection system; it is characterized in that: the transmission system includes a power device and a crawler, and the crawler is arranged on the surface of the power device; the reaction system includes a reaction tank, orthosilicic acid Ethyl ester is injected into the nozzle, water nozzle, and heating sheet; there are 2 to 10 reaction tanks on the track, and the reaction tank is a semi-closed square plane, and there are 2-10 mm high baffles around the reaction tank. The side length is 10 to 50 cm, and the bottom of the reaction tank is equipped with a heating sheet; 2 to 10 cm directly above the reaction tank, there are 2 to 5 pairs of ethyl orthosilicate injection nozzles and water nozzles in turn, and the ethyl orthosilicate injection nozzles The distance between the nozzle and the water nozzle is 5 to 30 cm; the tetraethyl orthosilicate injection nozz...

Embodiment 2

[0047] The composition design of a foam conductive network / silicon dioxide is the same as in Example 1.

[0048] A method for controlling a foam conductive network / silicon dioxide preparation device, comprising the following steps:

[0049] 1) Configure tetraethyl orthosilicate solution in a certain proportion, cut and foam conductive grid with equal sides to the reaction tank;

[0050] 2) Put the foam conductive net into the reaction tank, start the heating plate, and control the temperature of the reaction tank at 60°C; start the micro pump connected to the tetraethyl silicate storage tank and the water tank;

[0051] 3) Start the power unit, when the reaction tank is transported to directly below the tetraethyl orthosilicate injection nozzle; turn off the power unit; open the valve connected to the tetraethyl orthosilicate injection nozzle, and inject the tetraethyl orthosilicate solution, and the injection time is 3 seconds;

[0052] 4) Close the valve connected to the t...

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Abstract

The invention relates to a foam conductive net / silicon dioxide preparation device and a control method. The foam conductive net is used as a carrier, silicon dioxide is hydrolyzed and deposited with ethyl orthosilicate, and a reaction tank, ethyl orthosilicate injection nozzle and water nozzle are designed. , waste liquid collection tank, etc., control the transmission rate, and realize the uniform deposition of silicon dioxide on the foam conductive network by ethyl orthosilicate. The silicon negative electrode material prepared by the foam conductive network / silicon dioxide has good electrochemical performance and has good application prospects in the field of lithium ion batteries.

Description

technical field [0001] The invention belongs to the field of electrochemical power sources, and in particular relates to a foam conductive net / silicon dioxide preparation device and a control method. Background technique [0002] Silicon is a promising silicon anode material, but it is difficult to be directly applied to lithium-ion anode materials due to its poor conductivity and large volume change during charging and discharging. At present, the preparation of nanoporous silicon particles and silicon-based composite materials is an effective method to solve the commercial application of silicon anodes. [0003] Patent 1 (Chen Qing et al., a preparation method of Si-conductive ceramic negative electrode material for lithium batteries, ZL2017109636800) uses conductive ceramics, carbon coating layer and silicon nanoparticle composite; conductive ceramics have good mechanical properties and can absorb Internal stress due to the volume effect of silicon; the carbon coating re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/38H01M4/134H01M10/0525
CPCY02E60/10
Inventor 范美强李婷马廷丽李超张晶晶吕春菊
Owner CHINA JILIANG UNIV