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Pyrite FeS2 has emerged as promising anode material for sodium‐ion batteries (SIBs). Nevertheless, low electrical conductivity, large volume variation and shuttling effect generally lead to low specific capacity and inferior rate capability, greatly impeding its practical application. Here, heterostructured CoS2/FeS2 particles anchored on ultrathin carbon nanosheets (denoted as CoS2/FeS2/C) have been...