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A new type of polysulfate compound can be used to make polymer film capacitors that store and discharge high density of electrical energy while tolerating heat and electric fields beyond the limits of existing polymer film capacitors. Two hands with blue gloves are golding tubes in a lab setting. One tube is filled with a piece of copper that has been cleaned of other components and the other with the alkaline solution used to dissolve the quick-release battery binder Sunset at the Salton Sea with mountains in the distance. Illustration of a smart home running on electric and thermal battery power. Trucks on an asphalt road in a rural landscape at sunset. Collage style graphic of a scientist sitting at a computer desk in front of a blue background. Light microscopy image of nanowires. A wildfire blazes under power lines. Cityscape in the dark, with yellow lights shining in one building's windows. Artist's rendering of rechargeable lithium-ion batteries with a midnight blue background and electric blue outlines surrounding 3 batteries Mud volcanoes and mudpots next to the EnergySource Minerals power plant at the edge of the Salton Sea. stock photo of train