Charge Storage by Electrochemical Reaction of Water Bilayers Absorbed on MoS₂ Monolayers.

ABSTRACT: It is well-known that in neutral and acidic aqueous electrolytes, MoS₂ monolayers can store charges by adsorption of cations on to the electrode-electrolyte interface as its analog of graphene. Restricted by its low conductivity and the charge storage mechanism, the electrochemical performance of MoS₂ monolayer supercapacitor electrode is not satisfactory. It is reported here that water bilayers absorbed on MoS₂ monolayers can be involved in charge storage. One proton of each absorbed water molecule can intercalate/de-intercalate the water bilayers during charging/discharging in the alkaline aqueous electrolyte. For two water molecules are present for every Mo atom, the water bilayers can endow MoS₂ monolayers an ultrahigh specific capacitance. I

SUBMITTER: Zhou R 

PROVIDER: S-EPMC6408587 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature