Phase engineering of Mo_1-x W_x S₂ nanosheets for flexible supercapacitors

Considering the atomic size mismatch between Mo and W, a large compressive microstrain is introduced and phase engineering may be achieved in MoS2. A simple one-step hydrothermal method as a facile method is employed to synthesize 1T-Mo0.71W0.29S2. 1T-Mo0.71W0.29S2 doping Co element and then grow-ing on carbon cloth are the effective way to improve the supercapacitor performance. Benefitting from the outstanding conductivity of 1T-Mo0.71W0.29S2 and carbon cloth, the more active sites by doping Co, the electrode of Co-(1T-Mo0.71W0.29S2)-1% on carbon cloth exhibits high specific capacity of 1235 mF cm-2 at 2 mA cm-2. Flexible symmetric supercapacitors constructed by Co-(1T-Mo0.71W0.29S2)-1% on carbon cloth show high energy density (22.7 mu Wh cm -2), strong flexibility and stability (88.7% at 20 mA cm -2). The simple strategy provides a facile route for easy phase engineering and improvement on performance of transition metal dichalcogenides (TMDs). (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.