Nanoporous (NP) Si/Cu composites with different Cu contents are easily fabricated by means of alloy refining followed by facile electroless dealloying in mild conditions. NP-Si/Cu composites show a three-dimensional porous network nanoarchitecture with conductive Cu network embedded. With the advantages of rich porosity and integration of Cu into a nanoporous Si backbone, the NP-SiCu composites exhibit much higher cycling reversibility than pure NP-Si as an anode material for LIBs.
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