Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Steffen Hink"'
Publikováno v:
Membranes, Vol 2, Iss 2, Pp 237-252 (2012)
Spatially resolved impedance spectroscopy of a Nafion polyelectrolyte membrane is performed employing a conductive and Pt-coated tip of an atomic force microscope as a point-like contact and electrode. The experiment is conducted by perturbing the sy
Externí odkaz:
https://doaj.org/article/09611a60849e4cbf8d10cb2f8bb850e7
Autor:
Qingfeng Li, Suk Woo Nam, Jonghee Han, Hyoung-Juhn Kim, Dirk Henkensmeier, Lars Nilausen Cleemann, Jong Hyun Jang, Katrine Elsøe, Steffen Hink
Publikováno v:
European Polymer Journal. 72:102-113
Udel polysulfone based membranes with 4-aminopyridine pendant groups and cross-linking imidazole units are synthesized in a simple two step reaction. The ratio of 4-aminopyridine and imidazole is varied and the materials are extensively characterized
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6576bb841b2957595f63547b97aa04db
https://doi.org/10.1016/j.eurpolymj.2015.08.026
https://doi.org/10.1016/j.eurpolymj.2015.08.026
Autor:
Suk Woo Nam, Jonghee Han, Jin Young Kim, Jong Hyun Jang, Dirk Henkensmeier, Ngoc My Hanh Duong, Hyoung-Juhn Kim, Steffen Hink
Publikováno v:
Solid State Ionics. 275:80-85
Polysulfone-based membranes with pyridine (PY) side chains, crosslinked by imidazole (IM) groups, are synthesised, doped with phosphoric acid (PA) and characterised in the hydrogen/air fuel cell at 160 °C. It is shown that the bisphenol A (BPA) grou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d2dcf33842d09fcba8ec58e57181f06
https://doi.org/10.1016/j.ssi.2015.03.026
https://doi.org/10.1016/j.ssi.2015.03.026
Publikováno v:
Macromolecular Chemistry and Physics. 216:1235-1243
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84426cb16d12ec40a17514f7582a05a7
https://doi.org/10.1002/macp.201500063
https://doi.org/10.1002/macp.201500063
Autor:
Suk Woo Nam, Jong Hyun Jang, Dirk Henkensmeier, Tae Hoon Lim, N. Nambi Krishnan, Hyoung-Juhn Kim, Steffen Hink
Publikováno v:
Journal of Membrane Science. 454:174-183
We report a method which protects sulfonated hydrocarbon based proton exchange membranes at the interface between active and non-active area and in the gas inlet/outlet areas, where stresses are maximal during fuel cell operation. The sensitive membr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d944d4ed33dd31fb297501e154e27180
https://doi.org/10.1016/j.memsci.2013.12.020
https://doi.org/10.1016/j.memsci.2013.12.020
Autor:
Steffen Hink, Emil Roduner
Publikováno v:
Phys. Chem. Chem. Phys.. 15:1408-1416
A Nafion fuel cell membrane is investigated by means of electrochemical atomic force microscopy in different gas atmospheres. From chronoamperometric experiments with a point contact electrode spatially resolved electrochemical impedance spectra are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b45952a1cf737409b763cc27cea4bb3
https://doi.org/10.1039/c2cp42843a
https://doi.org/10.1039/c2cp42843a
Publikováno v:
ECS Transactions. 33:57-70
Perfluorinated, s-peek and s-ppek polymer electrolyte fuel cell membranes are investigated using electrochemical atomic force microscopy. The proton conductivity and the topography are measured simultaneously at a nanoscale resolution. The results ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d8de2ca544811ef13bf735bc4f2ea500
https://doi.org/10.1149/1.3484502
https://doi.org/10.1149/1.3484502
Publikováno v:
Membranes
Membranes, Vol 2, Iss 2, Pp 237-252 (2012)
Volume 2
Issue 2
Pages 237-252
Membranes, Vol 2, Iss 2, Pp 237-252 (2012)
Volume 2
Issue 2
Pages 237-252
Spatially resolved impedance spectroscopy of a Nafion polyelectrolyte membrane is performed employing a conductive and Pt-coated tip of an atomic force microscope as a point-like contact and electrode. The experiment is conducted by perturbing the sy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::70173f22308a09253eefad473193ec0d
https://pubmed.ncbi.nlm.nih.gov/24958175
https://pubmed.ncbi.nlm.nih.gov/24958175
Publikováno v:
Journal of Physics: Condensed Matter. 23:234109
The proton conductivity of a Nafion 112 membrane is measured with a high spatial resolution using electrochemical atomic force microscopy. Image analysis reveals an inhomogeneous conductivity distribution which is attributed to the limited connectivi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b2f663959e640ac0e2b5b62c8b9c230
https://doi.org/10.1088/0953-8984/23/23/234109
https://doi.org/10.1088/0953-8984/23/23/234109