Magnetically Aligned Nanodomains: Application in High-Performance Ion Conductive Membranes

被引：38

作者：

Hasani-Sadrabadi, Mohammad Mandi ^{[1
,2
,3
,4
,5
]}

Majedi, Fatemeh Sadat ^{[5
]}

Coullerez, Geraldine ^{[4
]}

Dashtimoghadam, Erfan ^{[6
]}

VanDersarl, Jules John ^{[3
]}

Bertsch, Arnaud ^{[3
]}

Moaddel, Homayoun ^{[7
]}

Jacob, Karl I. ^{[1
,2
]}

Renaud, Philippe ^{[3
]}

机构：

[1] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

[2] Georgia Inst Technol, GW Woodruff Sch Mech Engn, Atlanta, GA 30332 USA

[3] Ecole Polytech Fed Lausanne, Lab Microsyst LMIS4, Inst Microengn, Stn 17, CH-1015 Lausanne, Switzerland

[4] Ecole Polytech Fed Lausanne, Lab Powder Technol, Inst Mat, Stn 17, CH-1015 Lausanne, Switzerland

[5] Amirkabir Univ Technol, Ctr Excellence Biomat, Dept Biomed Engn, Tehran 158754413, Iran

[6] Amirkabir Univ Technol, Dept Polymer Engn & Color Technol, Tehran 158754413, Iran

[7] Hydrogen & Fuel Cell Inc, Arcadia, CA 91006 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2014年 / 6卷 / 10期

关键词：

polymer-decorating nanoparticles; SPION; aligned nanodomains; nanocomposite membranes; proton conductivity; fuel cell; POLYELECTROLYTE MEMBRANES; PROTON; NANOPARTICLES; ALIGNMENT; NANOCHANNELS; TRANSPORT;

D O I：

10.1021/am406042w

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Polyelectrolyte-coated magnetic nanoparticles were prepared by decorating the surface of superparamagnetic iron oxide nanoparticles (SPIONs) with crosslinked chitosan oligopolysaccharide (CS). These positively charged particles (CS-SPIONs) were then added to a negatively charged polymer (Nafion), and cast into membranes under an applied magnetic field. TEM and SAXS measurements confirmed this process created aligned, cylindrical nanodomains in the membranes. This was also indirectly confirmed by proton conductivity values. The strong electrostatic interaction between chitosan and Nafion prevented oxygen permeability and water evaporation at elevated temperatures through the proton conductive channels. The resultant proton exchange membranes showed lower conduction dependency to relative humidity, which is highly desirable for hydrogen fuel cells. The fuel cell performance tests were performed on the designed polyelectrolyte membrane by hydrogen oxygen single cells at elevated temperature (120 degrees C) and low relative humidity.

引用

页码：7099 / 7107

页数：9

共 41 条

[1] Function and characterization of metal oxide-naflon composite membranes for elevated-temperature H2/O2 PEM fuel cells [J].