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Annealing Boosts the Supercapacitive Properties of Molybdenum Disulfide Powder
Author(s) -
Mwonga Patrick V.,
Ipadeola Adewale K.,
Naidoo Shunmugam R.,
Quandt Alexander,
Ozoemena Kenneth I.
Publication year - 2020
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.202060436
Subject(s) - molybdenum disulfide , materials science , annealing (glass) , molybdenum , capacitance , electrode , chemical engineering , supercapacitor , optoelectronics , composite material , chemistry , metallurgy , engineering
This work compares the supercapacitive properties of pristine molybdenum disulfide (MoS 2 ‐AS) and its counterpart annealed at 450 °C (MoS 2 ‐450) in 1 M Na 2 SO 4 solution. The MoS 2 ‐450 powder delivers an increased specific capacitance and low charge‐tansfer resistance compared to the MoS 2 ‐AS powder, interpreted as the consequence of high pore size and annealing‐induced active edge sites on the MoS 2 ‐450 for facile charge transport. Symmetric cells of the MoS 2 ‐450 electrodes, connected in series, delivered a voltage of 3.5 V, high enough to light a 1.6 V LED. The high performance of the MoS 2 ‐450 means that it can be optimized for potential application.