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The 94 year old co-creator of the first lithium ion battery, John B. Goodenough, is currently working on a next generation battery solution. He along with researcher Maria Helena Braga has created a new low cost solid state battery that is safer and more energy efficient than the traditional Li-ion batteries. These new batteries apparently contain 3 times the power density of Li-ion batteries, and can charge much faster. These batteries can also get many more charging cycles. The tech is comprised of glass electrolytes. This means the batteries should be safer as they aren't able to form dendrites when charged too quickly which cause short circuits leading to fires. While this is a very exciting development don't expect to see this battery hit the market any time soon.
via Engadget