LAUSR

Abstract Ferroferric oxide (Fe 3 O 4 ), a potential anode material, has been limited by the intrinsically low electrical conductivity and dramatic volume variations resulting in significant capacity decay. Here, the Fe 3 O 4 nanospheres (Fe 3 O 4 NS) integrated with multiwalled carbon nanotubes (MWCNTs) and reduced graphene oxide (r-GO) are used to construct a novel layer-by-layer structure via electrostatic interaction self-assembly and vacuum filtration processes. The Fe 3 O 4 NS are closely attracted to the MWCNTs network, and the r-GO layer likes a scaffold enabling to obtain a paper-like electrode. The multilayer electrode exhibits impressive capacity of 720 mAh g −1 after 100 cycles at a current density 0.2 A g −1 , even after 300 cycles, the capacity is still above 420 mAh g −1 at 3.2 A g −1 . The multilayer structure can accommodate the volume change that occurs during cycling, and maintain the structural stability during long-term cycling, which result in their superior electrochemical properties.