A liquid flow battery with a longitudinal uniform flow field and its working method

Abstract

The invention discloses a longitudinal uniform flow field flow battery and a working method thereof. The flow battery comprises a positive electrode electrolyte recirculation zone, a positive electrode electrolyte supply zone, a positive electrode, an exchange membrane, a negative electrode, a negative electrode electrolyte supply zone and a negative electrode electrolyte recirculation zone, whichare arranged on a flow battery body; and the electrolyte supply zone is a cavity having a flow path and a hollow cavity excluding the flow path, the electrolyte supply zone is provided with an electrolyte distribution flow path and a dendritic electrolyte supply branch, a novel stepwise dendritic longitudinal inflow flow field is adopted to ensure that the electrolyte can be directly and uniformly supplied to the surface of the electrode, thereby improving the reaction degree of the electrolyte and improving the efficiency of the battery.

Description

technical field [0001] The invention relates to the technical field of liquid flow batteries, in particular to a liquid flow battery with a longitudinal uniform flow field and a working method thereof. Background technique [0002] With the increasingly serious problems of environmental pollution and shortage of fossil energy, people are developing and utilizing renewable energy such as wind energy and solar energy more and more widely. Grid integration presents enormous challenges. Large-scale energy storage technology is an important means to solve the intermittent problem of renewable energy generation, and it is also a key technology to solve the contradiction between supply and demand in the power system, ensure the stable operation of the power grid, and develop a smart grid. Existing energy storage technologies are difficult to be widely used due to special geological and geographical requirements, low energy density, high cost, and low cycle life. For example, the ...

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Problems solved by technology

[0003] Current flow batteries can be divided into two types according to the structure of the flow field: "flow-through type" and "flow-through type". Among them, the "flow-through" flow battery operates through the redox reaction of the electrolyte flowing from the side of the electrode to the other side. , this process requires the electrolyte to flow across the entire electrode surface, which brings huge pump power consumption. At the same time, due to the consumption of electrolyte during the flow process, the electrolyte concentration distribution on the electrode surface is uneven, which greatly reduces the flow battery. work efficiency

[0004] Therefore, in order to solve the problems of high electrolyte pumping work and uneven distribution of electrolyte concentration in the electrodes during the flow process of the flow battery, a high-efficiency flow battery with uniform reaction and low pumping work is urgently needed.

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