Regenerative energy is an intermittent energy source. When there is no wind or cloudy clouds, wind power and solar power plants can not work. Therefore, manufacturers hope that they can work with energy storage systems to increase the flexibility of power dispatching. However, the current price of lithium batteries is still relatively high, Not large-scale installations and collocation grid.
So MIT researchers have developed a new type of molten salt battery to improve the 50-year-old molten salt battery technology to create cheap, high storage efficiency and long life of the battery. Previous molten salt batteries, such as nickel chloride or sodium chloride batteries, kept the electrodes in a hot state, kept them in a molten state, and allowed the flow of charge therethrough.
Molten salt battery electrodes within the device film, its function in addition to separating the components within the molten salt battery, but also to keep the flow of internal molecules. In the past, the use of beta-alumina ceramic layers as thin films made it difficult to reach the commercial scale due to the brittle and fragile ceramic layers.
And MIT researchers found a different type of film – a titanium nitride coated steel mesh that uses the electrical properties of the mesh to make the same effect as the ceramic film – without brittle properties. Ceramic membrane is the use of materials in the size of the holes to block and filter molecules through, and steel is the electrical properties to achieve the same function, and more longevity.
Donald Sadoway, a Massachusetts Institute of Technology professor, said the new film can be used in a variety of molten salt batteries and opens the way for battery design. Future manufacture of sodium-sulfur batteries or nickel chloride, sodium chloride batteries will no longer need to use a fragile ceramic coating. And due to cheap, relatively rich raw materials, operating characteristics are also very safe, repeated charge and discharge cycles can also maintain its effectiveness, this breakthrough allows molten salt batteries up to commercialization.
However, the battery is not suitable for electric vehicles or consumer electronics, the advantage is that it can compete with the costly large energy storage system, said Donald Sadoway, a professor at the Massachusetts Institute of Technology. The design allows manufacturers to build large-scale Of the battery, even for grid-level energy storage systems, aided by intermittent renewable energy sources, and the same technology can be used elsewhere, such as in the manufacture of metals.
The research team includes Professor Fei Chen from Wuhan University of Technology, Nobuyuki Tanaka from Japan’s Atomic Energy Research Institute, Takanari Ouchi from MIT and Huayi Yin, postdoctoral fellows and Brice Chung and Ji Zhao. The research project also received the support of the French oil giant Total.