Wang Xianchao, Zhao Jing, Chen Ye, Zhu Kai, Ye Ke, Wang Qian, Yan Jun, Cao Dianxue, Wang Guiling, Miao Chenxu
Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.
Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.
J Colloid Interface Sci. 2022 Dec 15;628(Pt B):1041-1048. doi: 10.1016/j.jcis.2022.08.138. Epub 2022 Aug 25.
The structural stability and reaction kinetics of anodes are essential factors for high-performance battery systems. Herein, the molybdenum sulfide selenide (MoSSe) nanosheets anchored on carbon tubes (MoSSe@CTs) are synthesized by a facile hydrothermal method combining with further selenization/calcination treatment. The unique tubular carbon skeletons expose abundant active sites for the well-dispersed growth of MoS ultrathin nanosheets on both sides of the tubular carbon skeleton. In addition, the further selenization treatment can expand the interlayer spacing of molybdenum sulfide (MoS) nanosheets and facilitate the fast sodium/potassium-ion transition and storage. When used in sodium-ion batteries (SIBs), MoSSe@CTs electrode delivers a specific capacity of 486 mAh g at 1 A g and retains a stable reversible capacity of 465 mAh g after 1000 cycles, indicating its good cycling stability. For potassium-ion batteries (KIBs), the MoSSe@CTs composite shows a capacity of 352 mA hg at 1 A g and a good cycling stability (maintains at 272 mA hg after 1000 cycles). This work shows informative guiding significance for exploring advanced electrode materials of sodium/potassium-ion batteries.
阳极的结构稳定性和反应动力学是高性能电池系统的关键因素。在此，通过简便的水热法结合进一步的硒化/煅烧处理，合成了锚定在碳管上的硫化钼硒化物（MoSSe）纳米片（MoSSe@CTs）。独特的管状碳骨架为MoS超薄纳米片在管状碳骨架两侧的良好分散生长提供了丰富的活性位点。此外，进一步的硒化处理可以扩大硫化钼（MoS）纳米片的层间距，促进钠/钾离子的快速迁移和存储。当用于钠离子电池（SIBs）时，MoSSe@CTs电极在1 A g下的比容量为486 mAh g，在1000次循环后保持465 mAh g的稳定可逆容量，表明其具有良好的循环稳定性。对于钾离子电池（KIBs），MoSSe@CTs复合材料在1 A g下的容量为352 mAh g，并且具有良好的循环稳定性（1000次循环后保持在272 mAh g）。这项工作为探索钠/钾离子电池的先进电极材料具有重要的指导意义。
