Researchers at the Massachusetts Institute of Technology have developed a new flow battery that does not rely on expensive membranes to generate and store electricity. They say that the equipment will one day be cheap and have large-scale energy storage.
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The palm-sized prototype generated three times as much power per square centimeter as the power density of other membraneless systems is an order of magnitude higher than many lithium-ion batteries and other energy storage systems for commercial and experimental use.
This phenomenon is called laminar flow: two liquid pumps pass through a channel, which relies on the storage and release of energy at a device's mobile device, electrochemical reactions between the two electrodes, storing or releasing energy. Under proper conditions, these solutions pass through parallel streams with little mixing. The natural flow of separated liquids without the need for expensive membranes.
Composition of liquid bromine solution and reactants in a hydrogen fuel cell. The group chose bromine because chemistry is relatively inexpensive and can be produced in large quantities, producing more than 243,000 tons per year in the United States.
In addition, the low cost of bromine, the abundance, and the energy storage of the chemical reaction between hydrogen and bromine have great potential. However, based on fuel cell design, hydrogen and bromine are mainly mixed results: Hydrobromic acid tends to encroach on the membrane of the battery, effectively slowing down the reaction energy storage and reducing the battery life.
"The key to energy storage is the use of renewable energy technologies," Boudous said. "Until you can make storage energy reliable and affordable, it will not matter how cheap and efficient you are, it can make wind power and solar energy because our grid cannot handle the intermittent nature of those renewable energy technologies." By designing the flow battery without a membrane, the Buyow case said that the organization can remove two major obstacles to energy storage: cost and performance. Membranes are batteries that are often the most expensive components, the least reliable because they can be repeatedly exposed to corrosion by certain reactants. Bluff built a prototype small channel between the two electrodes of the flow battery. Through this channel, the group pumps the graphite cathode and hydrobromic acid of the porous anode under the liquid bromine ratio. At the same time, researchers flowed hydrogen throughout the anode. The resulting hydrogen and bromine forms of free electrons can relieve or release the reaction between the generated energy. The researchers were also able to reverse the electron capture and storage energy within the chemical reaction channel first for any membraneless design.
Bluff and his colleagues in the experiment, the battery flow rate at room temperature and the reactant concentration in a certain range. They found that the battery's maximum power density is 0.795 watts per square centimeter of energy.
Flow battery that does not rely on membrane generation to store electrical energy