Covalent-architected molybdenum disulfide arrays on Ti3C2Tx MXene fiber towards robust capacitive energy storage

作者：Sun, Suya; Zhu, Xiaolin; Wu, Xingjiang^*; Xu, Meigui; Hu, Ying^*; Bao, Ningzhong; Wu, Guan^*

来源：JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2023, 139: 23-30.

DOI：10.1016/j.jmst.2022.08.020

• Molybdenum disulfide
• Ti 3 C 2 T x fiber
• Covalent-architecture
• Supercapacitors
• High energy density

Ti3C2Tx MXene fiber has shown extraordinary potential for supercapacitor electrode in wearable elec-tronics and textile energy storage, but realizing high energy density and practical-powered applications remains a great challenge. Here, we report a covalent-architected molybdenum disulfide-Ti3C2Tx (MoS2 -Ti3C2Tx) core-shell fiber for high-performance supercapacitor. Benefiting from the microfluidic and micro -reaction strategies, the ordered MoS2 arrays are strongly bridged on Ti3C2Tx fiber via Ti-O-Mo bond, re-sulting in large exposed surface, enhanced porosity and excellent interfacial conduction for charges high diffusion and faradaic transfer. The MoS2-Ti3C2Tx fiber exhibits ultra-large capacitance of 2028 F cm -3 and admirable reversibility in 1 M H2SO4 aqueous electrolyte. Meanwhile, MoS2-Ti3C2Tx fiber-based solid-state supercapacitor presents high energy density of 23.86 mWh cm -3, capacitance of 1073.6 F cm -3 and superior cycling ability of 92.13% retention after 20,0 0 0 cycles, which can realize stable energy supply for wearable watch, LEDs, electric fans, toy ship and self-powered devices. Our work may provide an insight-ful guidance for the advanced design of structural fiber towards robust new energy and next-generation wearable industry.

• 单位
  清华大学; y