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Many energy-related materials rely on the uptake and release of large quantities of ions, for example, Li+ in batteries, H+ in hydrogen storage materials, and O2− in solid-oxide fuel cell and related materials. These compositional changes often result in large volumetric dilation of the material, commonly referred to as chemical expansion. Chemical expansion is a new means to probe other materials properties, and it contributes to investigations of electromechanical coupling.
Publications
“Chemical Expansion: Implications for Electrochemical Energy Storage and Conversion Devices” S.R. Bishop, D. Marrocchelli, C. Chatzichristodoulou, N.H. Perry, M.B. Mogensen, H.L. Tuller, and E.D. Wachsman, Annual Reviews of Materials Research, 44:6.1-6.35 (2014).
“Oxygen Nonstoichiometry and Chemical Expansion of Mixed Conducting La0.1Sr0.9Co0.8Fe0.2O3-δ", M.-B. Choi, D.-K. Lim, E. D. Wachsman, and S.-J. Song, Solid State Ionics, 221, 22-27 (2012).
“Oxygen Exchange Kinetics and Ionic Conductivity from Chemical Expansion Relaxation of Mixed Conducting Ba0.5Sr0.5Co0.8Fe0.2O3-δ", M.-B. Choi, S.-Y. Jeon, H.-N. Im, E. D. Wachsman, and S.-J. Song, Journal of the Electrochemical Society, 159, 23-28 (2012).
"Oxygen Excess non-Stoichiometry and Thermodynamic Quantities of La2NiO4+δ," S. Y. Jeon, M. B. Choi, J.H. Hwang, E. D. Wachsman, and S.J. Song, Journal of Solid State Electrochemistry, 16, 785-793 (2012).
“Stoichiometry of the LaFeO3 (010) Surface Determined from First Principles and Thermodynamic Calculations,” C.-W. Lee, R. K. Behera, E. D. Wachsman, S. R. Phillpot, and S. B. Sinnott, Physical Review B, 83, 115418 (2011).
“Thermo-Chemical Expansion in Strontium Doped Lanthanum Cobalt Iron Oxide (LSCF),” S.R. Bishop, K. L. Duncan, and E. D. Wachsman, Journal of the American Ceramic Society, 93, 4115-4121 (2010).
“Surface and Bulk Oxygen Non-Stoichiometry and Bulk Chemical Expansion in Gadolinium-Doped Cerium Oxide,” S.R. Bishop, K. L. Duncan, and E. D. Wachsman, Acta Materialia, 57, 3596-3605 (2009).
“Defect Equilibria and Chemical Expansion in Non-Stoichiometric Undoped and Gadolinium-Doped Cerium Oxide,” S.R. Bishop, K. Duncan, and E. D. Wachsman, Electrochimica Acta, 54, 1436-1443 (2009).
“Thermo-Chemical Expansion of SOFC Materials,” S.R. Bishop, K.L. Duncan, and E. D. Wachsman, Solid State Ionic Devices IV, ECS Transactions, E.D. Wachsman, F.H. Garzon, E. Traversa, R. Mukundan, and V. Birss, Ed., 1-7, 13-22 (2006).
“Effects of Oxygen Vacancy Concentration on Mechanical Properties of Cerium Oxide,” Y. Wang, K.L. Duncan, E. D. Wachsman, and F. Ebrahimi, Solid State Ionic Devices IV, ECS Transactions, E.D. Wachsman, F.H. Garzon, E. Traversa, R. Mukundan, and V. Birss, Ed., 1-7, 23-34 (2006).
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