Multi-dimensional porous electrode applied to flow battery, and preparation method and application of multi-dimensional porous electrode

A liquid flow battery and porous electrode technology, applied in battery electrodes, fuel cells, regenerative fuel cells, etc., can solve the problems of increased electrolyte flow resistance and pump work, reduced electrode permeability, and battery performance deterioration, and is easy to operate , Increase the specific surface area of ​​the electrode and improve the catalytic activity of the electrode
CN107863536AActive Publication Date: 2018-03-30THE HONG KONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
THE HONG KONG UNIV OF SCI & TECH
Publication Date
2018-03-30

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Abstract

The invention relates to a multi-dimensional porous electrode applied to a flow battery, and a preparation method and an application of the multi-dimensional porous electrode. The multi-dimensional porous electrode comprises a porous electrode framework formed by carbon fibers through lap jointing, gluing or weaving; second-stage holes are distributed in the surfaces of the carbon fibers; and third-stage holes are distributed in the inner surfaces of the second-stage holes. The multi-dimensional porous electrode can be applied to an all-vanadium redox flow battery; and when the porous electrode is applied to the all-vanadium redox flow battery, the current efficiency of the battery can reach 98% or above, the energy efficiency can reach 89%, the operating current density can reach 200mAcm<-2> or above, and the effective operating time can be more than 500 hours.
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Description

technical field

[0001] The invention relates to the technical field of flow batteries, in particular to a multi-scale porous electrode applied to flow batteries and its preparation method and application. Background technique

[0002] Energy is the basis of human existence and the driving force of social development, and the rational development and utilization of energy has attracted much attention. The extensive use of traditional fossil energy has brought many problems such as environmental pollution and climate change. Vigorously developing renewable energy represented by wind energy and solar energy is an effective way to achieve clean and sustainable energy supply. However, renewable energy has the characteristics of intermittent and fluctuating, which will often cause a greater impact on the power grid and become a bottleneck limiting its large-scale application. The development of grid-level power storage system is an effective way to solve this problem. Among the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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