6533b859fe1ef96bd12b7865
RESEARCH PRODUCT
A High-Performance Asymmetric Supercapacitor Based on Tungsten Oxide Nanoplates and Highly Reduced Graphene Oxide Electrodes.
Ibrahim KhanMuhammad AshrafMuhammad Nawaz TahirSyed Farooq AdilWolfgang TremelMuhammad UsmanMd. Abdul AzizMujeeb KhanNisar UllahSyed Shaheen ShahZainab Liaqatsubject
Supercapacitor010405 organic chemistryGrapheneOrganic ChemistryOxideGeneral Chemistry010402 general chemistryElectrochemistry01 natural sciencesCapacitanceCatalysis0104 chemical scienceslaw.inventionchemistry.chemical_compoundchemistryChemical engineeringlawElectrodeHybrid materialCurrent densitydescription
Tungsten oxide/graphene hybrid materials are attractive semiconductors for energy-related applications. Herein, we report an asymmetric supercapacitor (ASC, HRG//m-WO3 ASC), fabricated from monoclinic tungsten oxide (m-WO3 ) nanoplates as a negative electrode and highly reduced graphene oxide (HRG) as a positive electrode material. The supercapacitor performance of the prepared electrodes was evaluated in an aqueous electrolyte (1 m H2 SO4 ) using three- and two-electrode systems. The HRG//m-WO3 ASC exhibits a maximum specific capacitance of 389 F g-1 at a current density of 0.5 A g-1 , with an associated high energy density of 93 Wh kg-1 at a power density of 500 W kg-1 in a wide 1.6 V operating potential window. In addition, the HRG//m-WO3 ASC displays long-term cycling stability, maintaining 92 % of the original specific capacitance after 5000 galvanostatic charge-discharge cycles. The m-WO3 nanoplates were prepared hydrothermally while HRG was synthesized by a modified Hummers method.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-02-07 | Chemistry (Weinheim an der Bergstrasse, Germany) |