@inproceedings{99a5c12a20574f08a585aca6bae33d15,
title = "Life testing of Ni-YSZ fuel electrodes under electrolysis, fuel cell, and current switching operation",
abstract = "An electrode supported Ni-YSZ/YSZ/Ni-YSZ symmetric cell was studied in life tests with constant current and switching current operation. At a current density of 0.2 A/cm2, there was no evidence of degradation. The cell electrochemical performance degraded slightly during life tests at current densities ≥ 0.8 A/cm2, with the ohmic resistance increasing and polarization resistance decreasing. The electrode/electrolyte interface structure was found to be seriously degraded after the life tests, with the formation of interfacial voids. In addition, grain boundary voids were observed within the YSZ electrolyte, especially after constant current operation. These observations presumably explain the observed electrolyte resistance increase. Both Ni and YSZ nanoparticles were observed in the electrode functional layers after life tests, possibly explaining the decrease of polarization resistance.",
author = "Q. Liu and H. Wang and D. Kennouche and C. Riscoe and D. Butts and Barnett, {S. A.}",
note = "Funding Information: The authors gratefully acknowledge financial support by the US National Science Foundation (grant # DMR-1506925). The authors also acknowledge the assistance of the Electron Probe Instrumentation Center (EPIC) at the NUANCE Center-Northwestern University, which has received support from the MRSEC program (NSF DMR-1121262) at the Materials Research Center; the International Institute for Nanotechnology (IIN); and the State of Illinois, through the IIN. Publisher Copyright: {\textcopyright} The Electrochemical Society.; 15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 ; Conference date: 23-07-2017 Through 28-07-2017",
year = "2017",
month = may,
day = "30",
doi = "10.1149/07801.3179ecst",
language = "English (US)",
series = "ECS Transactions",
publisher = "Electrochemical Society Inc.",
number = "1",
pages = "3179--3188",
editor = "Singhal, {S. C.} and T. Kawada",
booktitle = "ECS Transactions",
edition = "1",
}