skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Tuning proton kinetics in BaCo 0.4 Fe 0.4 Zr 0.2– X Y X O 3– δ triple ionic-electronic conductors via aliovalent substitution

Journal Article · · Journal of Materials Chemistry. A
DOI:https://doi.org/10.1039/D3TA00654A· OSTI ID:1968522
ORCiD logo [1];  [2]; ORCiD logo [1]
  1. Department of Materials Science and Engineering, Clemson University, 515 Calhoun Drive, Clemson, SC 29634, USA, National Energy Technology Laboratory, United States Department of Energy, 3610 Collins Ferry Road, Morgantown, WV 26507, USA
  2. National Energy Technology Laboratory, United States Department of Energy, 3610 Collins Ferry Road, Morgantown, WV 26507, USA

The BaCo0.4Fe0.4Zr0.1Y0.1O3–δ (BCFZY0.1) triple ionic-electronic conductor (TIEC) has received thorough investigation as a potential cathode in protonic ceramic fuel cells (PCFCs) due to its excellent oxygen reduction reaction and concurrent conduction of electrons, oxygen ions, and protons. Proton conductivity and surface reactivity are paramount in PCFC cathodes to improve the active reaction area. However, few instances of direct proton kinetic measurements have been reported. In this work, a suite of BaCo0.4Fe0.4Zr0.2–XYXO3–δ (X = 0, 0.1, 0.2) materials is synthesized and evaluated through hydrogen permeation and electrical conductivity relaxation measurements to investigate the effect of aliovalent substitution of Y3+ for Zr4+ on bulk proton conductivity and surface kinetics. The permeation results suggest that aliovalent substitution significantly improves the proton conductivity upon a 10% B-site doping of Y, while further incorporation of Y slightly decreases conductivity from the 10% optimum. Through three separate conductivity relaxation measurements, oxidation, hydration, and isotopic switching, an improvement in the proton kinetics with Y-doping is observed in humidified oxidizing conditions, emulating conditions in intermediate-temperature electrochemical devices. These observations suggest that aliovalient doping plays an important role in the incorporation and mobility of protons in TIEC materials.

Research Organization:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
Sponsoring Organization:
USDOE; USDOE Office of Fossil Energy (FE)
OSTI ID:
1968522
Alternate ID(s):
OSTI ID: 2006868
Report Number(s):
DOE/NETL-2023/3858; JMCAET
Journal Information:
Journal of Materials Chemistry. A, Journal Name: Journal of Materials Chemistry. A Vol. 11 Journal Issue: 16; ISSN 2050-7488
Publisher:
Royal Society of Chemistry (RSC)Copyright Statement
Country of Publication:
United Kingdom
Language:
English

References (62)

Proton-conducting oxides for energy conversion and storage journal March 2020
Proton uptake in the H + -SOFC cathode material Ba 0.5 Sr 0.5 Fe 0.8 Zn 0.2 O 3−δ : transition from hydration to hydrogenation with increasing oxygen partial pressure journal January 2015
Exceptional power density and stability at intermediate temperatures in protonic ceramic fuel cells journal February 2018
Investigate the proton uptake process of proton/oxygen ion/hole triple conductor BaCo0.4Fe0.4Zr0.1Y0.1O3-δ by electrical conductivity relaxation journal November 2019
Transport properties of BaCe0.95Y0.05O3−α mixed conductors for hydrogen separation journal September 1997
Water-Induced Decoupling of Tracer and Electrochemical Oxygen Exchange Kinetics on Mixed Conducting Electrodes journal June 2016
Innovations in Palladium Membrane Research journal July 2002
Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides journal September 1976
Review: Measurement of partial electrical conductivities and transport numbers of mixed ionic-electronic conducting oxides journal April 2022
Proton-Conducting Oxides journal August 2003
Low thermal-expansion and high proton uptake for protonic ceramic fuel cell cathode journal May 2022
Enhanced Proton Conduction with Low Oxygen Vacancy Concentration and Favorable Hydration for Protonic Ceramic Fuel Cells Cathode journal December 2022
Protonic conduction in SrZrO3-based oxides journal March 1992
Oxygen transport in La0.6Sr0.4Co1−y Fe y O3−δ journal March 2004
Readily processed protonic ceramic fuel cells with high performance at low temperatures journal July 2015
The Influence of Local Distortions on Proton Mobility in Acceptor Doped Perovskites journal June 2018
Cathode water management towards improved performance of protonic ceramic fuel cells journal February 2023
New reduced-temperature ceramic fuel cells with dual-ion conducting electrolyte and triple-conducting double perovskite cathode journal January 2019
Transport properties of acceptor-doped barium zirconate by electromotive force measurements journal September 2016
A quantitative analysis of two-fold electrical conductivity relaxation behaviour in mixed proton–oxide-ion–electron conductors upon hydration journal January 2020
Operation Protocols To Improve Durability of Protonic Ceramic Fuel Cells journal December 2018
Proton uptake into the protonic cathode material BaCo0.4Fe0.4Zr0.2O3-δ and comparison to protonic electrolyte materials journal January 2017
Phase stability and hydrogen permeation performance of BaCo0·4Fe0·4Zr0·1Y0·1O3-δ ceramic membranes journal April 2022
A Dual-Phase Ceramic Membrane with Extremely High H 2 Permeation Flux Prepared by Autoseparation of a Ceramic Precursor journal July 2016
Mixed-Conducting Perovskites as Cathode Materials for Protonic Ceramic Fuel Cells: Understanding the Trends in Proton Uptake journal July 2018
Electrical conduction and hydrogen permeation through mixed proton–electron conducting strontium cerate membranes journal May 2000
Oxygen exchange and bulk diffusivity of BaCo0.4Fe0.4Zr0.1Y0.1O3-δ: Quantitative assessment of active cathode material for protonic ceramic fuel cells journal October 2021
Fundamental Impact of Humidity on SOFC Cathode ORR journal December 2015
Investigation of ideal zirconium-doped perovskite-type ceramic membrane materials for oxygen separation journal June 2002
New perovskite membrane with improved sintering and self-reconstructed surface for efficient hydrogen permeation journal February 2021
Triple ionic–electronic conducting oxides for next-generation electrochemical devices journal December 2020
A high-performance reversible protonic ceramic electrochemical cell based on a novel Sm-doped BaCe0·7Zr0·1Y0·2O3-δ electrolyte journal November 2019
Perovskite-based proton conducting membranes for hydrogen separation: A review journal August 2018
Self-Assembled Triple-Conducting Nanocomposite as a Superior Protonic Ceramic Fuel Cell Cathode journal November 2019
Enhanced accuracy of electrochemical kinetic parameters determined by electrical conductivity relaxation journal March 2021
Oxides with Mixed Protonic and Electronic Conductivity journal July 2021
Perovskite oxides applications in high temperature oxygen separation, solid oxide fuel cell and membrane reactor: A review journal July 2017
Surface and Bulk Oxygen Kinetics of BaCo0.4Fe0.4Zr0.2−XYXO3−δ Triple Conducting Electrode Materials journal October 2021
Hydrogen separation in La5.5WO11.25−δ membranes journal October 2013
Proton conductivity in mixed-conducting BSFZ perovskite from thermogravimetric relaxation journal January 2014
Highly durable, coking and sulfur tolerant, fuel-flexible protonic ceramic fuel cells journal May 2018
Understanding the Highly Electrocatalytic Active Mixed Triple Conducting Na x Ca 3– x Co 4 O 9–δ Oxygen Electrode Materials journal November 2022
Proton trapping in yttrium-doped barium zirconate journal May 2013
Probing oxygen reduction and water uptake kinetics of BaCo0.4Fe0.4Zr0.1Y0.1-xZnxO3-δ cathodes for protonic ceramic fuel cells journal September 2022
Oxygen Reduction at Dense Thin-Film Microelectrodes on a Proton-Conducting Electrolyte: I. Considerations on Reaction Mechanism and Electronic Leakage Effects journal January 2015
Palladium membranes applications in reaction systems for hydrogen separation and purification: A review journal November 2017
Proton uptake kinetics and electromotive force in BaCo0.4Fe0.4Zr0.1Y0.1O3-δ cathode material with e−/O2−/H+ three mobile carriers for protonic ceramic fuel cells journal January 2021
Ror2 signaling regulates Golgi structure and transport through IFT20 for tumor invasiveness journal January 2017
Nickel-doped BaCo0.4Fe0.4Zr0.1Y0.1O3-δ as a new high-performance cathode for both oxygen-ion and proton conducting fuel cells journal November 2020
Magnesium tuned triple conductivity and bifunctionality of BaCo0.4Fe0.4Zr0.1Y0.1O3-δ perovskite towards reversible protonic ceramic electrochemical cells journal December 2022
On the effect of electrode material in electrical conductivity relaxation - An alternative interpretation of the two-fold relaxation behavior in La5.4WO11.1- journal October 2022
Stable perovskite-fluorite dual-phase composites synthesized by one-pot solid-state reactive sintering for protonic ceramic fuel cells journal December 2021
Mixed hydrogen ion–electronic conductors for hydrogen permeable membranes journal November 2000
Outstanding hydrogen permeation through CO 2 -stable dual-phase ceramic membranes journal January 2014
Hydrogen permeation performance of dual-phase protonic-electronic conducting ceramic membrane with regular and independent transport channels journal April 2019
Protonic Conduction in La 2 NiO 4+ δ and La 2‐ x A x NiO 4+ δ ( A  = Ca, Sr, Ba) Ruddlesden–Popper Type Oxides journal April 2022
The best composition of an Y-doped BaZrO 3 electrolyte: selection criteria from transport properties, microstructure, and phase behavior journal January 2018
Realizing stable high hydrogen permeation flux through BaCo0.4Fe0.4Zr0.1Y0.1O3-δ membrane using a thin Pd film protection strategy journal February 2020
Low‐Temperature Protonic Ceramic Fuel Cells through Interfacial Engineering of Nanocrystalline BaCe 0.7 Zr 0.1 Y 0.1 Yb 0.1 O 3− δ Electrolytes journal July 2021
The BaCe0.16Y0.04Fe0.8O3−δ nanocomposite: a new high-performance cobalt-free triple-conducting cathode for protonic ceramic fuel cells operating at reduced temperatures journal January 2022
The two-fold diffusion process for proton uptake reaction in BCFZY e-/H+/O2- triple conductor measured by electrical conductivity relaxation journal September 2020
Stoichiometry Variation in Materials with Three Mobile Carriers-Thermodynamics and Transport Kinetics Exemplified for Protons, Oxygen Vacancies, and Holes journal February 2015