Researchers at Cambridge University, Stony Brook University, and New York University have developed methodology to improve battery performance and safety by serving as a diagnostic of its internal workings.

Because radio frequency fields do not penetrate metals, one can actually perform very sensitive measurements on the surfaces of conductors. In the case of the popular lithium-ion batteries, for example, the team was able to directly visualize the build-up of lithium metal deposits on the electrodes after charging the battery.

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