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Preparation method of graphite felt for flow battery

A liquid flow battery and graphite felt technology, applied in fuel cells, battery electrodes, regenerative fuel cells, etc., can solve the problems of low battery efficiency and low carbon content in graphite felt, and achieve stable electrode quality, high electrochemical activity, The effect of high electrode porosity

Active Publication Date: 2018-09-21
DALIAN LONGTIAN TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of low carbon content and low battery efficiency in graphite felt in the prior art, the invention provides a preparation method of graphite felt for flow batteries

Method used

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  • Preparation method of graphite felt for flow battery
  • Preparation method of graphite felt for flow battery
  • Preparation method of graphite felt for flow battery

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Effect test

Embodiment

[0027] A preparation method of graphite felt for a flow battery, characterized in that: comprising the following steps:

[0028] S1 raw material preparation:

[0029] (1) First, the chopped pre-oxidized wire is opened by an opener;

[0030] (2) Then, after opening, the chopped pre-oxidized wire is laid into a net through a carding machine and an air-laid machine to form a pre-oxidized wire mesh tire;

[0031] (3) Finally, the pre-oxygenated wire mesh tire is needled by a needle loom to form a pre-oxygenated wire felt;

[0032] S2 high temperature heating:

[0033] (1) Put the pre-oxidized silk felt prepared by S1 into a high-temperature carbonization and graphitization furnace, and raise the temperature from room temperature to 400°C in 2 hours, and then raise the temperature to 1200°C in 2 hours, all at a uniform speed;

[0034] (2) Keep warm for 4 hours at 1200°C;

[0035] (3) Continue to heat up to 2000°C and keep it warm for 4 hours;

[0036] (4) Cool down to room tem...

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Abstract

The invention belongs to the technical field of the preparation of carbon fiber felts, and particularly relates to a preparation method of a graphite felt for a flow battery. The preparation method comprises the following steps: preparing raw materials, heating at a high temperature, and activating. A pre-oxidized felt raw material is adopted, so that the erosion caused by the excessively high local temperature can be avoided, and the production cost can be reduced; the high-temperature treatment and activation process is optimized, the production period is shortened, and the production efficiency is improved; the pre-oxidized felt of the specific specification is selected, and the quality of a finished product is improved; the electrode porosity of a finished product obtained by using themethod of the invention is high, the specific surface area is large, the electrode quality is stable, and the service life is long; and the flow battery prepared by using the electrode is small in resistance value, high in electrochemical activity and excellent in battery performance.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber felt preparation, and in particular relates to a preparation method of graphite felt for a liquid flow battery. Background technique [0002] Liquid flow battery is a new type of clean energy storage device. Compared with lead-acid batteries and nickel-metal hydride batteries, it has obvious technical advantages such as high power, long life, support for frequent high-current charging and discharging, green and pollution-free, and is mainly used in renewable energy. Grid-connected power generation, urban grid energy storage, remote power supply and other fields. With the continuous consumption of natural energy (petroleum and coal), the problem of air quality degradation caused by fossil fuels has become increasingly prominent. The development and promotion of clean energy such as solar energy, wind energy, and geothermal energy, emphasizing new energy and renewable energy, are important to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/96H01M8/18
CPCH01M4/8605H01M4/8875H01M4/96H01M8/188Y02E60/50
Inventor 战丽姝樊志勇谭毅王登科
Owner DALIAN LONGTIAN TECH
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