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In this study, dumbbell-like Co3O4 is obtained via calcination of the prepared spindle-like CoCO3 precursor. The Co3O4 displays high specific surface area of 162.7m2g1 and narrow pore-size-distribution of 3.54nm. When applied as anode material, Co3O4 delivers a specific capacity as high as 1719mAh/g for initial discharge, and retains low discharge capacity loss over 200 cycles at 0.1C conditions...
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