title: A novel SWCNT-polyoxometalate nanohybrid material as an electrode for electrochemical supercapacitors.
abstract: A novel nanohybrid material that combines single-walled carbon nanotubes (SWCNTs) with a polyoxometalate (TBA)5[PVMoO40] (TBA-PV2Mo10, TBA: [(CH3(CH2)3)4N](+), tetra-n-butyl ammonium) is investigated for the first time as an electrode material for supercapacitors (SCs) in this study. The SWCNT-TBA-PV2Mo10 material has been prepared by a simple solution method which electrostatically attaches anionic [PV2Mo10O40](5-) anions with organic TBA cations on the SWCNTs. The electrochemical performance of SWCNT-TBA-PV2Mo10 electrodes is studied in an acidic aqueous electrolyte (1 M H2SO4) by galvanostatic charge/discharge and cyclic voltammetry. In this SWCNT-TBA-PV2Mo10 nanohybrid material, TBA-PV2Mo10 provides redox activity while benefiting from the high electrical conductivity and high double-layer capacitance of the SWCNTs that improve both energy and power density. An assembled SWCNT-TBA-PV2Mo10 symmetric SC exhibits a 39% higher specific capacitance as compared to a symmetric SC employing only SWCNTs as electrode materials. Furthermore, the SWCNT-TBA-PV2Mo10 SC exhibits excellent cycling stability, retaining 95% of its specific capacitance after 6500 cycles.
authors: TUM CREATE, 1 CREATE Way, #10-02 CREATE Tower, 138602 Singapore. madhavi@ntu.edu.sg Ulrich.Stimming@newcastle.ac.uk.
authors: Han-Yi
authors: HY
authors: Chen
authors: Rami
authors: R
authors: Al-Oweini
authors: Jochen
authors: J
authors: Friedl
authors: Ching Yi
authors: CY
authors: Lee
authors: Linlin
authors: L
authors: Li
authors: Ulrich
authors: U
authors: Kortz
authors: Ulrich
authors: U
authors: Stimming
authors: Madhavi
authors: M
authors: Srinivasan