
Six years ago, Jiaxing Huang discovered crumpled graphene balls — novel ultrafine particles that resemble crumpled paper balls. Credit: Jiaxing Huang
Approach avoids lithium dendrite growth. “In current batteries, lithium is usually atomically distributed in another material such as graphite or silicon in the anode,” explains Northwestern University’s Jiaxing Huang. “But using an additional material ‘dilutes’ the battery’s performance. Lithium is already a metal, so why not use lithium by itself?” The answer is a challenge scientists have spent years trying to overcome. As lithium gets charged and discharged in a battery, it starts to grow dendrites and filaments, “which causes a number of problems,” Huang said. “At best, it leads to rapid degradation of the battery’s performance...
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