Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - UV-Initiated Synthesis of Electroactive High Surface Area Ta and Ti Mesoporous Oxides Composites with Polypyrrole Nanowires within the Pores
AU - Smith, L.A.C.
AU - Romer, F.
AU - Trudeau, M.L.
AU - Smith, M.E.
AU - Hanna, J.V.
AU - Antonelli, D.M.
PY - 2015/8
Y1 - 2015/8
N2 - This paper describes the synthesis and characterization of high surface area mesoporous Ti and Ta oxides with polypyrrole nanowires in the pores. The incorporation of polymer was used to improve the electron conductivity into the channels inside these high surface area (400–1000 m2 g−1) materials in order to exploit surface redox sites for possible pseudocapacitive Li storage. Synthesis was achieved using catalyst-free UV-initiated polymerization of vapor-loaded pyrrole monomer. The best materials showed improved conductivity for both the Ti and Ta oxides as well as improved Li capacity (190 mA h g−1) relative to the pristine material (128 mA h g−1) and superior capacity retention (49 % as compared to 22 %) for the Ti composites. The retention in surface area was also 87 % compared to 49 % reported previously for analogous materials synthesized by catalyst-initiated methods, which only yielded Li capacities of 170 mA h g−1, further highlighting the superiority of this new photochemical approach. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
AB - This paper describes the synthesis and characterization of high surface area mesoporous Ti and Ta oxides with polypyrrole nanowires in the pores. The incorporation of polymer was used to improve the electron conductivity into the channels inside these high surface area (400–1000 m2 g−1) materials in order to exploit surface redox sites for possible pseudocapacitive Li storage. Synthesis was achieved using catalyst-free UV-initiated polymerization of vapor-loaded pyrrole monomer. The best materials showed improved conductivity for both the Ti and Ta oxides as well as improved Li capacity (190 mA h g−1) relative to the pristine material (128 mA h g−1) and superior capacity retention (49 % as compared to 22 %) for the Ti composites. The retention in surface area was also 87 % compared to 49 % reported previously for analogous materials synthesized by catalyst-initiated methods, which only yielded Li capacities of 170 mA h g−1, further highlighting the superiority of this new photochemical approach. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
KW - electron conductivity
KW - electron-conducting polymers
KW - mesoporous materials
KW - transition metal oxides
KW - UV-initiated synthesis
KW - Catalysts
KW - Characterization
KW - Conducting polymers
KW - Lithium
KW - Nanowires
KW - Polypyrroles
KW - Tantalum oxides
KW - Titanium oxides
KW - Transition metal compounds
KW - Transition metals
KW - Capacity retention
KW - Electron conductivity
KW - Electron-conducting polymers
KW - High surface area mesoporous
KW - Polypyrrole nanowires
KW - Pristine materials
KW - Synthesis and characterizations
KW - Transition-metal oxides
KW - Mesoporous materials
U2 - 10.1002/cnma.201500023
DO - 10.1002/cnma.201500023
M3 - Journal article
VL - 1
SP - 276
EP - 284
JO - ChemNanoMat
JF - ChemNanoMat
SN - 2199-692X
IS - 4
ER -