Sun Yimeng, Li Chen, Jiang Subin, Xia Rui, Wang Xing, Bao Haifeng, Gao Meizhen
School of Materials Science and Engineering, State Key Laboratory of New Textile Materials and Advanced Processing Technology, Wuhan Textile University, 430200 Wuhan, People's Republic of China.
Key Laboratory for Magnetism and Magnetic Materials of MOE, School of Physical Science and Technology, Lanzhou University, 730000 Lanzhou, People's Republic of China.
Nanotechnology. 2021 Jun 28;32(38). doi: 10.1088/1361-6528/ac09aa.
Due to the diversity of sulfur valence in cobalt-based sulfides, it is difficult to control the crystal phase and composition of the products during synthesis. Herein, a one-pot hydrothermal method is reported to self-assemble the cobalt sulfides (CoS, CoSand CoS) with hollow nanostructures. The whole preparation process is simple and mild, avoiding high temperature calcination. The performances of the three kinds of cobalt sulfide in superior supercapacitors and electrocatalytic oxygen evolution performance applications follow the order of CoS > CoS > CoS. Further analysis demonstrates that the performance difference in these cobalt sulfides may be attributed to three factors: the presence ofS22-,the coordination environment of Co and the presence of continuous network of Co-Co bonds. The distinctive electrochemical performance of CoSand CoSmay help us to better understand the excellent electrochemical activity of metal polysulfides and metal sulfides after doping or alloying. Therefore, this work may provide a reference in understanding and designing the electrode materials for highly efficient applications in the fields of energy storage and conversion.
由于钴基硫化物中硫价态的多样性，在合成过程中难以控制产物的晶相和组成。在此，报道了一种一锅水热法自组装具有中空纳米结构的硫化钴（CoS、CoS和CoS）。整个制备过程简单温和，避免了高温煅烧。三种硫化钴在优异的超级电容器和电催化析氧性能应用中的性能顺序为CoS＞CoS＞CoS。进一步分析表明，这些硫化钴的性能差异可能归因于三个因素：S22-的存在、Co的配位环境以及Co-Co键连续网络的存在。CoS和CoS独特的电化学性能可能有助于我们更好地理解掺杂或合金化后金属多硫化物和金属硫化物优异的电化学活性。因此，这项工作可能为理解和设计用于储能和转换领域高效应用的电极材料提供参考。
