Liao Wen-Hua, Hu Qian-Qian, Cheng Min, Wu Xiao-Hui, Zhan Guang-Hao, Yan Rui-Bo, Li Jian-Rong, Huang Xiao-Ying
College of Chemistry and Materials Science, Fujian Normal University Fuzhou 350007 P. R. China.
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou 350002 P. R. China
RSC Adv. 2021 Oct 11;11(53):33344-33353. doi: 10.1039/d1ra06427d. eCollection 2021 Oct 8.
ZnS/carbon nanocomposites have potential electrochemical applications due to their improved conductivity and more active sites through modification of the carbon materials. Herein, we report a facile method to synthesize the nanocomposites comprising ZnS nanoparticles and nitrogen-doped carbon (ZnS@NC). The inorganic-organic hybrid ZnS-amine material ZnS(ba) (ba = -butylamine) is synthesized on a large scale by a reflux method, which effectively shortens the reaction time while maintaining the high yield compared with the solvothermal method. Then ZnS(ba) is used as precursor for obtaining ZnS@NC nanocomposites a vacuum pyrolysis route, in which the content of carbon and nitrogen can be controlled by adjusting the pyrolysis temperature. Further, a series of ZnS-amine hybrid materials ZnS(ha), ZnS(en) and ZnS(pda) (ha = -hexylamine; en = ethylenediamine; pda = 1,3-propanediamine) are synthesized and used as precursors for the preparation of ZnS@NC materials, indicating the universality of this method. Moreover, the as-synthesized ZnS@NC materials exhibit remarkable lithium storage performance with outstanding cycling stability, high-rate capability and remarkable pseudo-capacitance characteristics.
硫化锌/碳纳米复合材料因其通过碳材料改性提高了导电性和增加了活性位点而具有潜在的电化学应用。在此，我们报道了一种简便的方法来合成包含硫化锌纳米颗粒和氮掺杂碳（ZnS@NC）的纳米复合材料。通过回流法大规模合成了无机-有机杂化的硫化锌-胺材料ZnS(ba)（ba = -丁胺），与溶剂热法相比，该方法有效缩短了反应时间，同时保持了高产率。然后将ZnS(ba)用作前驱体，通过真空热解路线获得ZnS@NC纳米复合材料，其中碳和氮的含量可通过调节热解温度来控制。此外，还合成了一系列硫化锌-胺杂化材料ZnS(ha)、ZnS(en)和ZnS(pda)（ha = -己胺；en = 乙二胺；pda = 1,3-丙二胺）并用作制备ZnS@NC材料的前驱体，表明该方法具有通用性。此外，所合成的ZnS@NC材料表现出卓越的锂存储性能，具有出色的循环稳定性、高倍率性能和显著的赝电容特性。
