Open AccessИонное сопротивление наноструктурированного электрохимического электрода в неравновесных условиях
Author(s) -
А.А. Нечитайлов,
Н.В. Глебова,
А.А. Томасов,
А.О. Краснова,
Н.К. Зеленина
Publication year - 2018
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2018.23.47019.17324
Subject(s) - nafion , dielectric spectroscopy , materials science , polarization (electrochemistry) , ionic bonding , electrode , electrochemistry , platinum , ionic liquid , chemical engineering , membrane , polymer , ionic conductivity , carbon nanotube , analytical chemistry (journal) , nanotechnology , ion , chemistry , composite material , chromatography , organic chemistry , catalysis , biochemistry , engineering , electrolyte
The ionic resistance of the membrane electrode assembly (MEA) of O_2/H_2 fuel cells is studied in situ in a broad range of MEA compositions by using electrochemical impedance spectroscopy and polarization measurements. The MEAs are composed of platinum on carbon, carbon nanotubes, and Nafion, a proton- conducting polymer. We investigate atypical growth of the MEA resistance with the increasing Nafion content and spatial nonuniformity in the MEA ionic resistivity. A mechanism underlying this phenomenon is proposed.