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Stanford University

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Caption

Previous attempts to force an iron-based cathode material to give up more electrons provided more useful energy but weakened the material, which collapsed when lithium flowed to the anode during charging (top), rendering the material useless. Stanford/SLAC-led researchers have engineered a new version of this cathode material (bottom) that bends slightly to accommodate the retreating lithium and remains intact for its return.

Credit

Hari Ramachandran

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