Urchinlike ZnS Microspheres Decorated with Nitrogen-Doped Carbon: A Superior Anode Material for Lithium and Sodium Storage

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• 作者：Junming Li ; Yun Fu ; Xiaodong Shi ; Zhenming Xu and Prof. Zhian Zhang
• 刊名：Chemistry - A European Journal
• 出版年：2017
• 出版时间：January 1, 2017
• 年：2017
• 卷：23
• 期：1
• 页码：157-166
• 全文大小：6455K
• ISSN：1521-3765

文摘

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⁻¹ after 100 cycles at 100 mA g⁻¹ and a reversible sodium-storage capacity of 460 mAh g⁻¹ after 80 cycles at 200 mA g⁻¹.The ZnS@NC electrode shows a high reversible lithium-storage capacity of 520 mAh g⁻¹ after 200 cycles and a high reversible sodium-storage capacity of 380 mAh g⁻¹ after 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.