Composite Nafion Membranes with CaTiO3−δ Additive for Possible Applications in Electrochemical Devices

Membranes

Oriele Palumbo¹  Annalisa Paolone¹  Anna Martinelli²  Khalid Elamin²  Lucia Mazzapioda³  MariaAssunta Navarra³  Francesco Trequattrini⁴ 

[1] Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi, U.O.S. La Sapienza, Piazzale A. Moro 5, 00185 Roma, Italy;Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296 Gothenburg, Sweden;Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy;Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy;

关键词: nafion;    catio_3-δ;    inorganic filler;    composite electrolyte;   

DOI  :  10.3390/membranes9110143

来源: DOAJ

【 摘 要 】

A composite membrane based on a Nafion polymer matrix incorporating a non-stoichiometric calcium titanium oxide (CaTiO_3−δ) additive was synthesized and characterized by means of thermal analysis, dynamic mechanical analysis, and broadband dielectric spectroscopy at different filler contents; namely two concentrations of 5 and 10 wt.% of the CaTiO_3−δ additive, with respect to the dry Nafion content, were considered. The membrane with the lower amount of additive displayed the highest water affinity and the highest conductivity, indicating that a too-high dose of additive can be detrimental for these particular properties. The mechanical properties of the composite membranes are similar to those of the plain Nafion membrane and are even slightly improved by the filler addition. These findings indicate that perovskite oxides can be useful as a water-retention and reinforcing additive in low-humidity proton-exchange membranes.

【 授权许可】

Unknown