title: Urchinlike ZnS Microspheres Decorated with Nitrogen-Doped Carbon: A Superior Anode Material for Lithium and Sodium Storage.
abstract: Urchinlike ZnS microspheres decorated with nitrogen-doped carbon (ZnS@NC) were fabricated by a facile two-step method in which urchinlike ZnS microspheres were coated with polydopamine and then calcined in an inert gas atmosphere. When employed as the anode material for lithium-ion batteries and sodium ion batteries, ZnS@NC exhibits a reversible lithium-storage capacity of 690 mAh g-1after 100 cycles at 100 mA g-1and a reversible sodium-storage capacity of 460 mAh g-1after 80 cycles at 200 mA g-1.The ZnS@NC electrode shows a high reversible lithium-storage capacity of 520 mAh g-1after 200 cycles and a high reversible sodium-storage capacity of 380 mAh g-1after 100 cycles even at a current density of 1 A g-1. The superior electrochemical performance could be ascribed to structural merits of the urchinlike ZnS microspheres and synergistic effects between ZnS and polydopamine-derived nitrogen-doped carbon. The lithium- and sodium-storage capacities of urchinlike ZnS@NC microspheres are in the top rank in comparison with those reported in other studies.
authors.affiliation: School of Metallurgy and Environment, Central South University, Changsha, Hunan, 410083, P. R. China.
authors.forename: Junming
authors.initials: J
authors.lastname: Li
authors.affiliation: School of Metallurgy and Environment, Central South University, Changsha, Hunan, 410083, P. R. China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Fu
authors.affiliation: School of Metallurgy and Environment, Central South University, Changsha, Hunan, 410083, P. R. China.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Shi
authors.affiliation: School of Metallurgy and Environment, Central South University, Changsha, Hunan, 410083, P. R. China.
authors.forename: Zhenming
authors.initials: Z
authors.lastname: Xu
authors.affiliation: School of Metallurgy and Environment, Central South University, Changsha, Hunan, 410083, P. R. China.
authors.forename: Zhian
authors.initials: Z
authors.lastname: Zhang
keywords: batteries; electrochemistry; lithium; sodium; zinc sulfide