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Submicron-sized cube-like α-Fe 2 O 3 agglomerates were successfully fabricated via hydrothermal technique. The material showed a high reversible capacity of 900.2mAhg −1 and excellent capacity retention of 88.9% after 35 cycles at a current density of 40mAg −1 . The initial columbic efficiencies of the as-prepared powder were 82.65 and 80.57% at current densities of...
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