Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 14, Issue 12, Pages 6476-6483Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ee01497h
Keywords
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Funding
- National Research Foundation of Korea (NRF) - Korean Government (MSIP) [2019R1A2C4070158]
- Korean Government (MSIT) [2021R1C1C2006657]
- National Research Foundation of Korea [2019R1A2C4070158, 2021R1C1C2006657, 4199990313853] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Researchers have successfully developed a new protonic ceramic fuel cell electrolyte with high electrochemical performance, surpassing values of previously reported PCFCs without the need for complex engineering, which has advanced the technology in this field.
Proton conducting electrochemical cells, especially protonic ceramic fuel cells (PCFCs), are expected to be a breakthrough technology in next-generation energy conversion systems, primarily because of their high proton conductivity and low activation energy below 600 degrees C. However, the low chemical and physical stability of proton conducting oxides during the sintering process has resulted in a substantially lower electrochemical performance than their predictions, limiting their utilization and application. Here, we present the fabrication of a stoichiometric BaZr0.4Ce0.4Y0.1Yb0.1O3-delta (BZCYYb) electrolyte with an average grain size of similar to 10 mu m by controlling the chemical potential of the A-site cation, Ba, near the BZCYYb electrolyte surface during the sintering process. A stoichiometric BZCYYb-based PCFC in an anode-supported configuration exhibits 1.90 W cm(-2) and 1.01 W cm(-2) with an extremely low ohmic resistance of 0.060 ohm cm(2) at 650 degrees C and 0.082 ohm cm(2) at 550 degrees C, respectively, surpassing the values of all previously reported PCFCs without complicated engineering in materials and structures of other cell components.
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