Electrode of liquid flow cell
A flow battery and electrode technology, which is applied in the direction of battery electrodes, fuel cells, regenerative fuel cells, etc., can solve the problems of unsatisfactory electrolyte transmission and diffusion, large thickness and internal resistance of flow batteries, and low power density of flow batteries, etc. problems, to achieve the effect of easy processing, small thickness and internal resistance, and high power density
Inactive Publication Date: 2010-08-11
GOLDEN ENERGY FUEL CELL
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Problems solved by technology
[0004] In order to improve the transmission and diffusion speed of the electrolyte in the graphite felt electrode of the flow battery, a guide net and a turbulent net are usually arranged between the ion exchange membrane and the graphite felt electrode, but there are complex structures, difficult processing, inconvenient assembly, and liquid flow problems. Defects such as large battery thickness and internal resistance, unsatisfactory electrolyte transmission and diffusion effect, low power density, low energy efficiency, and short service life of flow batteries
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[0020] Please refer to figure 1 , figure 2 , image 3 , The present invention is an all-vanadium redox flow battery electrode. The electrode is composed of graphite felt 1, which is polyacrylonitrile graphite felt. The graphite felt 1 is square, and the thickness of the graphite felt 1 is H. A plurality of longitudinal flow channels 2 for transporting electrolyte are opened on the surface of the graphite felt 1. Each flow channel 2 is a direct flow channel, and the width of each flow channel 2 It is C, the depth is D, the flow channels 2 are equally spaced, and the distance is L.
[0021] Three examples are listed below. The three examples all use graphite felt 1 as an electrode and are assembled with a perfluorinated ion membrane to form an all-vanadium redox flow battery. The charge and discharge test is carried out using a vanadium ion electrolyte with a concentration of 2mol / L. The specific test results are as follows table:
[0022]
Example one
Example two
Example thr...
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Abstract
The invention relates to an electrode of a liquid flow cell, which consists of a graphite felt, wherein a plurality of flow passages for conveying electrolytes are arranged on the graphite felt; the graphite felt is a polyacrylonitrile graphite felt; the flow passages are straight flow passages, and are distributed equidistantly; the thickness of the graphite felt is between 2 and 10 millimeters, the width of each flow passage is between 1 and 5 millimeters, the depth of each flow passage is between 1 and 5 millimeters, and the separation distance among the flow passages is between 1 and 5 millimeters; and the widths, depths and separation distance of the flow passages all are half of the thickness of the graphite felt. The electrode of the liquid flow cell has the advantages of simple structure, easy machining, convenient assembly, small thickness and internal resistance of the liquid flow cell, good effect of conveying diffusion of the electrolytes, large power density of the liquid flow cell, high energy efficiency and long service life, and can be made into high-power even ultrahigh power liquid flow cells.
Description
Technical field [0001] The present invention belongs to the field of flow batteries, and relates to flow battery electrodes, in particular to all vanadium flow battery electrodes. Background technique [0002] There are many types of flow batteries. The flow battery represented by the all-vanadium flow battery performs electrochemical reactions on porous diffusion electrodes through electrolytes of different valences, thereby realizing the mutual conversion of chemical energy and electrical energy. It is the world today. High-efficiency reversible fuel cell with the largest scale, the most advanced technology, and the closest to industrialization. It has the unique advantages of large power, large capacity, high efficiency, low cost, long life, and environmental protection. It is used in photovoltaic power generation, wind power generation, distributed power stations, Power grid peak shaving, communication base stations, UPS power supply, transportation and municipal administrati...
Claims
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IPC IPC(8): H01M4/96
CPCH01M8/0258H01M8/0234H01M8/0243H01M8/0239Y02E60/528H01M8/188Y02E60/50H01M4/86H01M8/02H01M8/18H01M8/026
Inventor 郑重德张春荣任金华王东奎马洪波宁洪涛
Owner GOLDEN ENERGY FUEL CELL