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SnO2–Co3O4 core–shell nanoneedle arrays are vertically aligned on copper foil by a facile template-free method. Without using any binder, conductive carbon or other ancillary materials, SnO2–Co3O4 core–shell nanoneedle arrays on copper foil are directly used as the anodes of lithium battery. At 0.5C rate (2h per charging cycle), their reversible capacity maintains at ∼985mAhg−1 after 20cycles, higher...
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