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Abstract
Nickel cobalt (Ni–Co) sulfides with different stoichiometric Ni to Co ratios have been successfully synthesized based on a facile anion-exchange reaction of NixCo3–x(CO3)1.5(OH)3 precursors with S2−. All of the Ni–Co sulfides share similar sea urchin-like structures with numerous nanotubes extend outward from the center. The electrochemical performance of Ni–Co sulfides can be tuned owing to the synergistic effect between Ni and Co ions. The bimetallic Ni–Co sulfides show much higher specific capacity than monometallic Co sulfide. Especially, the Ni0.25Co0.75 sulfide shows superior electrochemical performance, which delivers the highest specific capacity of 676 C g−1 at 1 A g−1 combined with excellent cycling stability.
Graphical Abstract
Sea urchin-like Ni–Co sulfides with different stoichiometric Ni to Co ratios have been synthesized for charge storage, and the sulfides with Ni to Co ratio of 1:3 show superior electrochemical performance.
Die im Laufe eines Jahres in der „adhäsion“ veröffentlichten Marktübersichten helfen Anwendern verschiedenster Branchen, sich einen gezielten Überblick über Lieferantenangebote zu verschaffen.
