Methanol oxidation by pEDOT-pSS/PtRu in DMFC

Arbizzani, Catia; Biso, Maurizio; Manferrari, Elisa; Mastragostino, Marina

doi:10.1016/j.jpowsour.2007.09.033

Cited by 42 publications

(18 citation statements)

References 23 publications

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“…Drillet et al 33 were the first to demonstrate PEDOT-supported Pt as the anode for DMFCs; these authors observed a striking change in the morphology after prolonged storing of PEDOT reaction-layer in air and reported ameliorated performance in relation to freshlyprepared PEDOT reaction-layer. Recently, Arbizzani et al 34,35 have studied a passive DMFC with PEDOT-PSSA supported Pt-Ru as catalyst both for its anode and cathode more so to demonstrate mixed (electron + proton) conduction in PEDOT-PSSA supported Pt-Ru catalyst and have reported mass activity for PEDOT-PSSA supported Pt-Ru catalyst to be similar to Vulcan XC-72 supported Pt-Ru catalyst. By contrast, Patra et al 36 have reported higher electrochemical activity towards methanol oxidation with Pt dispersed on PEDOT in relation to carbon-supported Pt.…”

Section: Introductionmentioning

confidence: 99%

A solid-polymer-electrolyte direct methanol fuel cell (DMFC) with Pt-Ru nanoparticles supported onto poly(3,4-ethylenedioxythiophene) and polystyrene sulphonic acid polymer composite as anode

et al. 2010

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Nano-sized Pt-Ru supported onto a mixed-conducting polymer composite comprising poly(3,4-ethylenedioxythiophene)-polystyrene sulphonic acid (PEDOT-PSSA) is employed as anode in a solid-polymer-electrolyte direct methanol fuel cell (SPE-DMFC) and its performance compared with the SPE-DMFC employing conventional Vulcan XC-72R carbon supported Pt-Ru anode. Physical characterization of the catalyst is conducted by Fourier-transform infra-red (FTIR) spectroscopy, X-ray diffraction (XRD), Scanning electron microscopy (SEM) and Energy dispersive X-ray analysis (EDAX) in conjunction with cyclic voltammetry and chronoamperometry. The study suggests that PEDOT-PSSA to be a promising alternative catalyst-support-material for SPE-DMFCs.

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Section: Introductionmentioning

confidence: 99%

A solid-polymer-electrolyte direct methanol fuel cell (DMFC) with Pt-Ru nanoparticles supported onto poly(3,4-ethylenedioxythiophene) and polystyrene sulphonic acid polymer composite as anode

et al. 2010

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“…From the perspective of ionic conductivity, the PSS used as a dopant in PEDOT:PSS can effectively provide Li + ion conductive routes and a "polar solvent-philic" environment [60]. The ionic (lithium) conductivity in PEDOT:PSS has been estimated to be on the order of 10 -6 S cm -1 [61,62]. Despite PEDOT:PSS not allowing very high ionic transport, it has been speculated that a nanoscale-thick PEDOT:PSS coating layer would be too thin to slow down the overall kinetics of the electrochemical process, as we observed in previous results [60,63,64].…”

Section: Resultsmentioning

confidence: 99%

Bifunctional separator as a polysulfide mediator for highly stable Li–S batteries

Abbas

Ibrahem

et al. 2016

J. Mater. Chem. A

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CitationBifunctional separator as a polysulfide mediator for highly stable Li-S batteries 2016 J. Graphical Abstract ABSTRACTThe shuttling process involving lithium polysulfides is one of the major factors responsible for the degradation in capacity of lithium-sulfur batteries (LSBs). Herein, we demonstrate a novel and simple strategy-using a bifunctional separator, prepared by spraying poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) on pristine separator-to obtain long-cycle LSBs. The negatively charged SO 3 -groups present in PSS act as an electrostatic shield for soluble lithium polysulfides through mutual coulombic repulsion, whereas PEDOT provides chemical interactions with insoluble polysulfides (Li 2 S, Li 2 S 2 ). The dual shielding effect can provide an efficient protection from the shuttling phenomenon by confining lithium polysulfides to the cathode side of the battery. Moreover, coating with PEDOT:PSS transforms the surface of the separator from hydrophobic to hydrophilic, thereby improving the electrochemical performance. We observed an ultralow decay of 0.0364% per cycle when we ran the battery for 1000 cycles at 0.25 C-far superior to that of the pristine separator and one of the lowest recorded values reported at a low current density. We examined the versatility of our separator by preparing a flexible battery that functioned well under various stress conditions; it displayed flawless performance. Accordingly, this economical and simple strategy appears to be an ideal platform for commercialization of LSBs.

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“…The PtRu (1:1) was chemically deposited on pEDOT-pSS ball-milled powder and on Vulcan XC-72R commercial carbon as in refs. [23,13]. The Pt contents of pEDOT-pSS/PtRu and Vulcan/PtRu were 27 and 16 wt.%, respectively, as experimentally determined after mineralization of the powders by the tin (II) chloride colorimetric method [31].…”

Section: Methodsmentioning

confidence: 94%

“…Given the renewed interest in conducting polymers as an alternative to carbon supports [23][24][25][26][27][28][29][30], we recently demonstrated [23] the viability of pEDOT-pSS, a mixed electronic-protonic conductor, as a Nafion ® -free support for PtRu in DMFCs. We now report performance data over long operational times of passive DMFCs with supported catalysts, PtRu on pEDOT-pSS for the anode and Pt (in excess with respect to Pt in PtRu catalyst) on Vulcan XC72-R carbon for the cathode, assembled with Nafion ® 117 membrane and 1 M CH 3 OH.…”

Section: Introductionmentioning

confidence: 99%

Passive DMFCs with PtRu catalyst on poly(3,4-ethylenedioxythiophene)-polystyrene-4-sulphonate support

Arbizzani

Biso

Manferrari

et al. 2008

Journal of Power Sources

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Methanol oxidation by pEDOT-pSS/PtRu in DMFC

Cited by 42 publications

References 23 publications

A solid-polymer-electrolyte direct methanol fuel cell (DMFC) with Pt-Ru nanoparticles supported onto poly(3,4-ethylenedioxythiophene) and polystyrene sulphonic acid polymer composite as anode

A solid-polymer-electrolyte direct methanol fuel cell (DMFC) with Pt-Ru nanoparticles supported onto poly(3,4-ethylenedioxythiophene) and polystyrene sulphonic acid polymer composite as anode

Bifunctional separator as a polysulfide mediator for highly stable Li–S batteries

Passive DMFCs with PtRu catalyst on poly(3,4-ethylenedioxythiophene)-polystyrene-4-sulphonate support

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