Carbon nano tube composite material wrapped by carbon material as well as preparation and application of carbon nano tube composite material

A carbon nanotube and composite material technology, which is applied in the preparation/purification of carbon, nanocarbon, active material electrodes, etc., can solve the problems of electrolyte drying, battery explosion, affecting battery life, etc., and reduce the amount of hydrogen produced. , The effect of reducing the hydrogen evolution current and reducing the peak current

Active Publication Date: 2022-05-13
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the most direct problem brought about by the introduction of carbon materials is that a large amount of hydrogen gas is precipitated from the negative electrode at the end of battery charging, causing the electrolyte to dry up.

Method used

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  • Carbon nano tube composite material wrapped by carbon material as well as preparation and application of carbon nano tube composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1: Use the following method to prepare carbon materials-carbon nano-micro-ball composite materials:

[0023] 1) Full 10.269g sucrose to fully dissolved in 50ml ultra -pure water, and then add a 2G mass concentration of 5 % with a length of 100nm with a diameter of 10nm. In a polytimonia water heating kettle with a volume of 100ml, the water thermal kettle is transferred to 180 ° C for 12 hours at 180 ° C;

[0024] 2) 5G step 1) The solid product is made for centrifugal washing with ultra -pure water. The products obtained are scattered in a polyethylene pyrigne (PVP) solution with a mass concentration of 5 % after drying. After full stirring for 30 minutes, take the solid matter for 12 hours under 90 ° C. The carbon ball material containing carbon -carbon nanotubes with an average diameter of 3 μm;

[0025] 3) The drying product of step 2) is transferred to the N2 atmosphere environment for 5 hours under 800 ° C, and the sintered product is transferred to CO 2 The atmo...

Embodiment 2

[0031] The process is the same as the implementation example 1. The difference is that the lead carbon battery: According to the requirements of the embodiment 1, the other conditions are not changed, and the specifications of the commercial CNT are changed to 10nm and the diameter of 2nm. nanotube. The prepared electrode material analyzes the hydrogen current under -1.6V. The hydrogen current is 98.08545mA. The gas production rate of lead carbon batteries for this formula is 0.24ml / (WH · H).

Embodiment 3

[0033] The process is the same as the implementation example 1. The difference is that the lead carbon battery: according to the requirements of the embodiment 1, the specifications of the commercial CNT for the addition of the added commercial CNT are not changed. nanotube. The prepared electrode material analyzes the hydrogen current at 330.7894mA under the condition of -1.6V. The gas production rate of lead carbon batteries for this formula is 0.37ml / (WH · H).

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Abstract

The invention relates to a lead-carbon battery, in particular to a carbon-material-wrapped carbon nanotube composite material and preparation and application thereof.The preparation method includes the steps that in a hydrothermal reaction, a sucrose or glucose aqueous solution and carbon nanotubes are added into a kettle for a hydrothermal reaction, a solid product is dried and then dispersed in a polyvinylpyrrolidone (PVP) aqueous solution again, and drying is conducted; and sintering in an N2 atmosphere environment, and activating the sintered product in a CO2 atmosphere environment to obtain the composite material. The peak current density of hydrogen precipitation in the charging process of the lead-carbon battery is reduced, battery sulfation is relieved, and the cycle life of the battery is prolonged.

Description

Technical field [0001] The invention involves the field of lead -carbon batteries, and specially involves energy storage batteries and start -stop batteries. technical background [0002] Due to the excellent cycle stability and low development costs of lead -carbon batteries, it has become an important energy storage technology that is gradually valued by enterprises and researchers. Leaded carbon batteries improve the conductivity of the negative electrode by adding activated carbon -type materials to the traditional lead -acid battery negative electrode, effectively slowing the gathering and growing of lead -sulfate chips of the negative discharge products in the battery charging process. However, the most direct problem brought by the introduction of carbon materials is that a large number of negative poles of the battery charging at the end of the charging cause a large number of hydrogen caused by the drying of the electrolyte. This phenomenon affects the battery life, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15C01B32/05H01M4/14H01M4/62H01M10/06
CPCC01B32/15C01B32/05H01M4/628H01M4/625H01M4/14H01M10/06H01M2004/027H01M2004/021Y02E60/10
Inventor 阎景旺李先锋席耀宁张华民
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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