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A facile twice-hydrothermal method is developed for large-scale growth of NiCo2S4 nanotube array on Ni foam with robust adhesion. As-prepared materials are characterized by SEM, XRD and EDS. It can be observed that NiCo2S4 nanotubes directly grow on Ni foam with an average inner-diameter of ∼55nm, external-diameter of 100nm, and length of ∼2μm. When evaluated as a binder-free anode for LIBs, NiCo2...
Hemispherical CuO clusters assembled by mesoporous nanocrystal ribbons are directly grown on Ni foam. As anode material of lithium-ion batteries, CuO ribbon clusters exhibit high specific capacity, high stability, and good rate performance, superior to commercial CuO powder. At 0.2C, after 50 cycles, the discharge capacities are still 3 times that of commercial CuO, sustaining 81% discharge capacity...
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