College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology , Yueyang 414006, China.
Department of Chemistry, University of Missouri-Kansas City , Kansas City, Missouri 64110, United States.
ACS Appl Mater Interfaces. 2018 Jan 10;10(1):704-712. doi: 10.1021/acsami.7b15659. Epub 2017 Dec 28.
ZnS coated on N,S co-doped carbon (ZnS/NSC) composite has been prepared utilizing zinc pyrithione (CHNOSZn) as raw material via calcination. Through activation using NaCO salt, ZnS nanoparticles encapsulated in NSC (denoted as A-ZnS/NSC) with mixed-crystal structure has also been obtained, which reveals much larger specific surface area and more bridges between ZnS and NSC. Based on the existence of bridges (C-S-Zn and S-O-Zn bonds) and the modification of carbon from N,S co-doping, the A-ZnS/NSC composite as an anode for sodium-ion batteries (SIBs) displays significantly enhanced electrochemical performances with a high reversible specific capacity of 516.6 mA h g (at 100 mA g), outstanding cycling stability (96.9% capacity retention after 100 cycles at 100 mA g), and high rate behavior (364.9 mA h g even at 800 mA g).
利用锌吡硫翁（CHNOSZn）作为原料，通过煅烧的方法制备了包覆在 N、S 共掺杂碳（ZnS/NSC）上的 ZnS（ZnS/NSC）复合材料。通过使用 NaCO 盐进行激活，得到了 ZnS 纳米粒子封装在 NSC 中的复合材料（记为 A-ZnS/NSC），其具有混合晶体结构，比表面积更大，ZnS 和 NSC 之间的桥梁更多。基于桥梁（C-S-Zn 和 S-O-Zn 键）的存在以及 N、S 共掺杂对碳的修饰，作为钠离子电池（SIBs）的阳极，A-ZnS/NSC 复合材料表现出显著增强的电化学性能，具有 516.6 mA h g 的高可逆比容量（在 100 mA g 时），出色的循环稳定性（在 100 mA g 时 100 次循环后容量保持率为 96.9%），以及高倍率性能（甚至在 800 mA g 时也能达到 364.9 mA h g）。
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