Researchers use crumpled graphene balls to avoid dendrite growth on Li-metal anodes

By mmillikin Lithium metal—with its high theoretical capcity and low electrochemical potential—is an ideal anode for Li-ion batteries, and is the material of choice for advanced batteries such as Li-sulfur and Li-O2. However, dendritic growth on the anode leads to an unstable solid electrolyte interphase, volume fluctuation, and even shorting of the battery; as a result, use of solid Li-metal anodes has been limited. In current batteries, lithium is usually atomically distributed in another material such as graphite or silicon in the anode.

Researchers at Northwestern University and Tianjin University now report an effective approach to avoiding dendrite growth on Li-metal anodes by

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