Renewable energy sources like wind and solar are critical to sustaining our planet, but they come with a big challenge: they don't always generate power when it's needed. To make the most of them, we need efficient and affordable ways to store the energy they produce, so we have power even when the wind isn't blowing or the sun isn't shining.
Columbia Engineers develop new powerful battery 'fuel' -- an electrolyte that not only lasts longer but is also cheaper to produceRenewable energy sources like wind and solar are critical to sustaining our planet, but they come with a big challenge: they don't always generate power when it's needed. To make the most of them, we need efficient and affordable ways to store the energy they produce, so we have power even when the wind isn't blowing or the sun isn't shining.
Columbia Engineering material scientists have been focused on developing new kinds of batteries to transform how we store renewable energy. In a new study published September 5 bythe team used K-Na/S batteries that combine inexpensive, readily-found elements -- potassium and sodium , together with sulfur -- to create a low-cost, high-energy solution for long-duration energy storage.
Yang's group developed a new electrolyte, a solvent of acetamide and ε-caprolactam, to help the battery store and release energy. This electrolyte can dissolve K2S2 and K2S, enhancing the energy density and power density of intermediate-temperature K/S batteries. In addition, it enables the battery to operate at a much lower temperature than previous designs, while still achieving almost the maximum possible energy storage capacity.
A new study says that moving the world energy system away from fossil fuels and into renewable sources will generate carbon emissions by itself, as construction of wind turbines, solar panels and ...
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