科研之友
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摘要
Nanostructured nickel sulfides with different morphologies were one-pot synthesized on Ni foam using a template-free hydrothermal method, and were further used as an anode in lithium-ion batteries. The effect of morphologies on the electrochemical behaviors of the anode in the batteries were investigated, of which the nanosheet array one delivers the best lithium storage properties including reversible specific capacity and rate capability in comparison to the reported Ni3S2 anode-based lithium-ion batteries. Results indicate that the electrode kinetics for all three electrode materials is controlled by electron interfacial transfer rather than the mass transport process, and thus the excellent capacity performance is mainly resulted from the morphology-enabled fast interfacial electron transfer rate.
