Liquid-Exfoliated Molybdenum Telluride Nanosheets for High-Performance Supercapacitors

Two-dimensional (2D) MoTe₂ nanomaterials have emerged as a promising candidate for constructing excellent supercapacitors due to their high capacitive performance. Recent studies have revealed that MoTe₂ has broad prospects as an active material in supercapacitors, although its strict requirements in terms of the external environment and complex preparation process remain serious obstacles to its practical application. Toward this end, MoTe₂ nanosheets (NSs) were prepared by a facile and inexpensive liquid-phase exfoliation approach for the fabrication of MoTe₂ electrodes. The results show that the MoTe₂ NSs exhibit significantly improved electrochemical performance, with a specific capacitance (859 F g⁻¹) more than three times that of bulk MoTe₂ (271 F g⁻¹) at a current density of 1 A g⁻¹. In addition, the MoTe₂-based electrode showed excellent cycle stability and maintained excellent specific capacitance (92.7% of the initial value) after 1000 cycles under the working condition of a current density of 10 A g⁻¹. This study describes a fundamental investigation on the energy storage and conversion properties of 2D layered materials.