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In‐situ formation and intercalation of carbon dots induced high‐yield 1T‐molybdenum disulfide as electrode materials
Author(s) -
Xie Fei,
Wang Guoyu,
Zhao Tianlei,
Wang Qiyang,
Yan Manqing,
Bi Hong,
Tang Longxiang
Publication year - 2020
Publication title -
energy storage
Language(s) - English
Resource type - Journals
ISSN - 2578-4862
DOI - 10.1002/est2.118
Subject(s) - materials science , molybdenum disulfide , x ray photoelectron spectroscopy , chemical engineering , exfoliation joint , raman spectroscopy , electrode , scanning electron microscope , molybdenum , carbon fibers , hydrothermal circulation , graphene , nanotechnology , chemistry , composite number , composite material , metallurgy , physics , optics , engineering
Herein, carbon dots/octahedral molybdenum disulfide hybrids (CDs@1T‐MoS 2 ) were successfully fabricated via a facile hydrothermal method by the induction of carbon dots. In this method, CDs as a core in this system were first synthesized via hydrothermal method of citric acid (CA). Their morphology and properties were analyzed using X‐Ray diffraction (XRD), Raman spectroscopy, Xray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) measurements. Results indicated that the high yield (about 78%) and ultrathin sheets octahedral 1T‐MoS 2 were obtained by introducing CDs fabricated by hydrothermal CA. Importantly, this work effectively solves the aggregation of non‐substituted MoS 2 sheets via in‐situ formation, intercalation and exfoliation of CDs and achieves MoS 2 sheet‐based electrode materials with big specific surface area and high specific capacitance as well as good rate capability and excellent cycling stability. Among binary CDs@1T‐MoS 2 hybrids, the S4 hybrid especially exhibits the highest specific capacitance of 380 F/g at a current density of 0.5 A/g and the best cycle stability with keeping 97% after 2000 charge‐discharge cycles. The outstanding performances of the CDs@1T‐MoS 2 hybrids were mainly attributed to the awesome synergistic effects between CDs and 1T‐MoS 2 . And these multifunctional CDs@1T‐MoS 2 hybrids have great potential applications in supercapacitance electrode material, microwave adsorption, and catalytic degradation.