Nowadays with the popularization of renewable energy, the market for energy storage has great potential for development. By storing energy in fixed battery cells to increase the efficiency of wind and solar energy, Tesla hopes to further explore the energy market with the development of EV lithium battery packs.
Harvard University research team believes that, in addition to lithium batteries, there must be more suitable for storage of energy structure design. Professor Michael Aziz and his team are developing flow battery packs, some of which are said to be more conducive to energy storage.
In the flow battery cell, the liquid electrolyte circulates in two container housings, and the two housings are separated by a thin film. Ion transport through the thin film to achieve the charge, the entire process and hydrogen fuel cell power generation principle is similar. Adjusting the dimensions of the two container boxes changes the storage capacity of the flow battery and the area of ​​the foil controls the size of the power output.
The researchers claim that even if the flow battery pack is placed for a long period of time, there will be no loss of electrical energy and extreme temperature conditions will not affect the stored electricity. In addition, flow battery packs will be cheaper than lithium-ion products of comparable storage capacity. Compared to the lithium battery pack, the prototype material for the flow battery being tested is more conventional and easier to use than the previous design.
Some earlier flow batteries dissolved vanadium and bromine in electrolytes to form electrolytes. Now researchers are testing quinones instead of vanadium and ferrocyanide instead of bromine. Battery prototype products using a low degree of corrosion of the alkaline solution, lighter and cheaper composite plastic box to be applied. Replacing metal cases in other energy storage designs can cause increased resistance, but studies have found that raising the voltage can solve this problem.
New flow battery prototype product life cycle of 1900 charge and discharge cycles, but the energy density level is lower than the lithium battery pack. Laboratory data show that the flow battery pack energy density of 19 watt hours / liter, while the lithium-ion battery pack to reach 300 watt hours / liter. Nevertheless, the Harvard research team remains convinced that the next three years, the flow of battery packs will be commercially viable.
Flow battery pack development is not limited to this, the German nanoFlowcell company recently demonstrated a variety of concept models using flow batteries, including 1075 horsepower coupe. The concept car has been licensed for testing on public roads in Germany, but the future of the car is unclear.
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