In-situ formation of Co1−xS hollow polyhedrons anchored on multichannel carbon nanofibers as self-supporting anode for lithium/sodium-ion batteries

摘要: Abstract The exploration of prospective electrode materials represents great challenges for remarkable lithium-ion batteries (LIBs) and sodium-ion (SIBs). Herein, we report a reliable synthetic approach the in-situ growth Co-based zeolitic imidazolate framework (ZIF-67) on electrospun nanofibers, followed by carbonization sulfurization with formation free-standing Co1−xS hollow polyhedrons anchored multichannel carbon nanofibers (Co1−xS/MCF) LIBs SIBs. Co1−xS/MCF displays high reversible capacity (813 mAh g−1 over 180 cycles at 0.1 A g−1), stable cycle performance (559 300 1 g−1) in LIBs. For SIBs, exhibits favorable Na-storage (433 120 g−1). as-prepared binder-free anode demonstrates advanced electrochemical properties It is attributed to particular nanostructure (Co1−xS HPs), which provide enough active sites, internal void space effectively reduces structural strain eases volume expansion maintain integrity. This work gives insights design unique structure promising