In‐situ formation and intercalation of carbon dots induced high‐yield 1T‐molybdenum disulfide as electrode materials. Issue 2 (20th December 2019)

• Record Type: Journal Article
• Authors: Xie, Fei; Wang, Guoyu; Zhao, Tianlei; Wang, Qiyang; Yan, Manqing; Bi, Hong; Tang, Longxiang
• Is Part Of: Energy storage. Volume 2:Issue 2(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-12-20
• Subjects: carbon dots (CDs) -- electrochemical performances -- hydrothermal method -- octahedral molybdenum disulfide (1T‐MoS2); Energy storage -- Periodicals; Energy storage; Periodicals; 621.04205
• DOI: 10.1002/est2.118
• Languages: English
• ISSNs: 2578-4862

Abstract

Abstract: Herein, carbon dots/octahedral molybdenum disulfide hybrids (CDs@1T‐MoS2 ) 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‐MoS2 were obtained by introducing CDs fabricated by hydrothermal CA. Importantly, this work effectively solves the aggregation of non‐substituted MoS2 sheets via in‐situ formation, intercalation and exfoliation of CDs and achieves MoS2 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‐MoS2 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‐MoS2 hybrids were mainly attributed to the awesome synergistic effects between CDs and 1T‐MoS2 . And these multifunctional CDs@1T‐MoS2 hybrids have great potential applications in supercapacitance electrode material, microwave adsorption, and catalytic degradation.