Phase engineering of high-purity 1T-MoS2 synthesis with organic chemical groups for enhanced supercapacitors

Abstract

The preparation of metallic molybdenum disulfide (1T-MoS2) through the phase engineering strategy could bring exceptional electrochemical performance with high conductivity and significant interlayer spacing. However, synthesizing high-purity 1T-MoS2 using a simple method remains a challenge. In this work, high-purity 1T-MoS2 was successfully produced through a one-step hydrothermal treatment facilitated by the presence of organic chemical groups. The resulting MoS2 exhibited a high capacitance of 180 F g−1 at 1.0 A g−1 as a supercapacitor electrode and demonstrated an impressive cycling stability of 84.6% after 10000 cycles. Moreover, an asymmetric supercapacitor (ASC) device constructed using the prepared CA-MoS2 and activated carbon on carbon cloths exhibited good supercapacitor performance. These findings demonstrate that organic chemical groups can be utilized to assist the phase engineering of transition metal dichalcogenides in energy storage and conversion.