BaCe0.85-xZrxSm0.15O3-δ(0.01 < x < 0.3) (BCZS): Effect of Zr Content in BCZS on Chemical Stability in CO2and H2O Vapor, and Proton Conductivity

2012 ◽  
Vol 160 (1) ◽  
pp. F18-F26 ◽  
Author(s):  
Ramaiyan Kannan ◽  
Sukhdeep Gill ◽  
Nicola Maffei ◽  
Venkataraman Thangadurai
Keyword(s):  
Proton Conductivity ◽  
Chemical Stability

A promising Al-CeZrO4/HPW-incorporated SPEEK composite membrane with improved proton conductivity and chemical stability for PEM fuel cells

2020 ◽  
pp. 095400832095707
Author(s):  
Yingfeng Wang ◽  
Jiabin You ◽  
Zhuowei Cheng ◽  
Kun Jiang ◽  
Linlin Zhang ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Composite Membrane ◽  
Chemical Stability ◽  
Pem Fuel Cells ◽  
Nanocomposite Membrane ◽  
Acid Base ◽  
Base Pairs ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Speek Membrane

An improved sulfonated poly (ether ether ketone) (SPEEK) nanocomposite membrane was prepared by incorporating both phosphotungstic acid (HPW) and Al doped cerium-based oxides (Al-CeZrO4) in SPEEK matrix. The HPW was immobilized by Al-CeZrO4 so that firmly dispersed acid–base pairs were formed. The introduction of Al-CeZrO4 helped improve the chemical stability of the pristine (baseline) SPEEK membrane without compromising the conductivity, and the addition of HPW further enhanced the conduction of protons through acid–base interactions. Stability tests showed that when the SPEEK/Al-CeZrO4 nanocomposite membrane was immersed in a Fenton’s solution for 108 h at 80°C, a loss of 34.9% in proton conductivity was observed, which is 24.1% less than that of the pristine SPEEK membrane, indicating that the attenuation of membrane proton conductivity was inhibited. At the same time, the proton conductivity of the SPEEK/Al-CeZrO4/HPW nanocomposite membrane (that has already incorporated HPW) was increased by 15.5% compared to the SPEEK/Al-CeZrO4 nanocomposite membrane. Hence, Al-CeZrO4/HPW is considered as an effective inorganic nanofiller for improving both proton conductivity and chemical stability of SPEEK membranes, and the hybrid composite membrane is worth further studying.

A proton-conductive lanthanide oxalatophosphonate framework featuring unique chemical stability: stabilities of bulk phase and surface structure

2017 ◽  
Vol 5 (48) ◽  
pp. 25350-25358 ◽  
Author(s):  
Xiaoqiang Liang ◽  
Kun Cai ◽  
Feng Zhang ◽  
Jia Liu ◽  
Guangshan Zhu
Keyword(s):  
Surface Structure ◽  
Proton Conductivity ◽  
Chemical Stability ◽  
Bulk Phase ◽  
Unique Chemical

We select a chemically stable lanthanide oxalatophosphonate framework with proton conductivity as an example, analyzing and evaluating its chemical stability based on the bulk phase and surface structure.

Proton conductivity and chemical stability of Li2SO4 based electrolyte in a H2S–air fuel cell

2006 ◽  
Vol 160 (2) ◽  
pp. 909-914 ◽  
Author(s):  
Jinxia Li ◽  
Jing-Li Luo ◽  
Karl T. Chuang ◽  
Alan R. Sanger
Keyword(s):  
Fuel Cell ◽  
Proton Conductivity ◽  
Chemical Stability

Strontium-substituted Ba(Ce,Zr)O3-δ oxides for proton conducting membranes

2014 ◽  
Vol 07 (06) ◽  
pp. 1440014 ◽  
Author(s):  
Wojciech Zając ◽  
Emil Hanc
Keyword(s):  
Crystal Lattice ◽  
Proton Conductivity ◽  
Chemical Stability ◽  
Full Range ◽  
Proton Conducting ◽  
Conducting Oxides ◽  
Lattice Symmetry ◽  
Order Of Magnitude ◽  
Conducting Membranes

This paper is focused on Ba 1-x Sr x( Ce 0.75 Zr 0.25)0.9 Nd 0.1 O 2.95 proton-conducting oxides, for which the effect of substitution of barium by strontium in a full range of compositions is studied. Crystal lattice symmetry, proton conductivity and stability in CO 2 atmosphere are discussed. Substitution of barium by strontium reduces toxicity and does not deteriorate chemical stability, however, crystal lattice of the strontium-substituted perovskites is more distorted, causing reduction of proton conductivity more than one order of magnitude. Balance between opposite tendencies can be found at low Sr content, e.g., 25 at.%.

The Development of Novel Electrolyte Membrane with High Proton Conductivity at Medium Temperatures

2012 ◽  
Vol 472-475 ◽  
pp. 2819-2823
Author(s):  
Xue Dan Wang ◽  
Le Bin Yang ◽  
Jia Bin Liu ◽  
Yue Xiang Huang ◽  
Hang Yan Shen ◽  
...  
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Proton Conductivity ◽  
Chemical Stability ◽  
Wide Temperature Range ◽  
Proton Conductor ◽  
Dramatic Improvement ◽  
High Proton Conductivity ◽  
Electrolyte Membrane ◽  
High Proton

A novel electrolyte membrane PVDF-Al2O3-CsHSO4 usable at medium temperatures was prepared by composite of PVDF and an inorganic proton conductor Al2O3-CsHSO4. The membrane has a steep increase in proton conductivity around 90°C and retains the high conductivity, about 10-3 S•cm-1, up to 200°C. The incorporation of Al2O3-CsHSO4 with PVDF leads to a dramatic improvement of the properties of PVDF, including widen the phase transition temperature of CsHSO4, improve proton conductivity and enhance chemical stability over wide temperature range.

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