A research team at MIT has created a prototype of a flow battery that does not require a pump system. Its greatest feature is the use of the hourglass principle, which reduces production difficulties and improves ease of use. Due to the hourglass design, you can change its angle to adjust the flow rate, which is the speed of energy production. Traditional flow batteries rely more on pumps and valve mechanisms. Liquid electrolytes are stored in two outer boxes, and the central stack is separated by two electrode membranes.
The prototype of the new flow battery is much like an hourglass, simplifying the manufacturing process and being easy to use.
The prototype battery of the MIT team was designed to dispense with expensive and complicated operating mechanisms. It streamlines the feeding system into a single, driving the liquid chemical medium through the reaction chamber.
The flow is only one aspect of the prototype, and the other half is a solid plate containing lithium. Of course, this hybrid system is only for simple testing, and the final application will include electrodes on both sides of the flow battery.
How to let liquids flow "correctly" is a big challenge for the team. This requires adjusting the mixture of optimized batteries and liquids, but the end result is relatively simple, compact, and affordable.
The team found that it was most stable (low flow rate/best efficiency) when approaching the horizontal angle. The researchers pointed out that this type of solid/liquid hybrid battery demonstrates the possibility that, depending on the actual situation, we may be able to achieve a better balance on the all-solid/full-cell battery.
Although this theoretical study will not be transferred to large-scale production, the research team expects that batteries will use this point to achieve modularization in the future. The grid energy storage system can be expanded as needed. Intermittent energy sources such as wind power and solar energy will benefit the most.
Details of this study have been published in the recently published Energy and Environmental Science journal.
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