Nanocrystalline and Thin Film Germanium Electrodes with High Lithium Capacity and High Rate Capabilities

Abstract

Germanium nanocrystals ~12 nm mean diam! and amorphous thin films ~60-250 nm thick! were prepared as anodes for lithium secondary cells. Amorphous thin film electrodes prepared on planar nickel substrates showed stable capacities of 1700 mAh/g over 60 cycles. Germanium nanocrystals showed reversible gravimetric capacities of up to 1400 mAh/g with 60… (More)

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