Synthesis of carbon-coated Co3O4 composite with dendrite-like morphology and its electrochemical performance for lithium-ion batteries

摘要: Carbon-coated Co3O4 microparticles (Co3O4@C) with dendrite-like morphology are prepared by a low-temperature hydrothermal method and subsequent C2H2 chemical vapor deposition (CVD) for the first time. The synthesized precursor has size of 8–10 μm, which is assembled lots aligned wire 4–5 μm in length. After carbon coating, were proved to be coated amorphous ~10 nm. A plausible formation process Co3O4@C proposed based on structure characterizations materials. As an anode material lithium-ion batteries, composite electrode exhibits higher reversible capacity better cycling performance than unmodified electrode. after 40 cycles 500 mAh g−1, much that (148 g−1). Electrochemical impedance spectra cyclic voltammogram indicate layer CVD can improve electrochemical activity enhance reversibility during charge/discharge cycles.