A team from the university of Massachusetts has developed a polymer based energy storage system that emits energy in the form of heat when needed.The scientists say their system USES polymer chains, like Christmas lights, that can be twice as dense as the previous polymer system.
A new battery, developed by scientists at the university of Massachusetts, provides a new alternative to lithium batteries.The batteries store energy in bonds, releasing heat instead of electricity.
According to a report in the journal science reports, the system can achieve an average storage density of 510J/g, with a maximum of 690 J/g.The previous polymer energy storage system was only 200J/g."Theoretically we can achieve 800 j/g storage density, but no one can do it," professor of chemistry at the university of Massachusetts Dhandapani Venkataraman said, "this article reports that we have reached the one of the highest energy storage density of polymer system."
The system was built on the foundation of an earlier study by Jeffrey Grossman, a professor at the Massachusetts institute of technology.He proposes that molecules be arranged around carbon nanotubes, allowing scientists to manipulate molecules and determine the absorption and release of energy.
The researchers used Grossman's idea of control of the layout, but chose a flexible polymer instead of a carbon nanotube."You can't shorten the distance between the molecules of carbon nanotubes," Venkataraman explains, "we want to is similar to Christmas lights as the structure of the polymer chains will make azobenzene groups get closer to each other and influence each other, that is when they get energy and become more stable."
Although the initial results were successful, the team could not explain why the selection of solvents improved the energy storage efficiency through further experiments."We believe that the distance between the light bulbs on the line (the molecules on the analog chain) is the most important.But what's more important is the way many lines and their lights are arranged, "continued Venkataraman."It turns out that the solvents we use basically ensure maximum storage density."
The team says there are still some practical problems related to charging, and will now focus on research.The technology can be applied to solar panels.Solar panels collect energy during the day and use it to heat or cook after dark.