期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 49, 页码 42387-42396出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b15402
关键词
BaCe0.68Zr0.1Y0.1Yb0.1Cu0.02O3-delta; protonic conductivity; sinterability; stability; reversible solid oxide cells
资金
- National Natural Science Foundation of China [51302296, 51672294, 51372259]
- Shanghai Engineering Research Center of Inorganic Energy Materials and Electric Power Sources [15DZ2281200]
Lattice modification by incorporating heteroatoms could effectively and precisely tune their intrinsic properties to get improved sinterability and electrochemical performance. Here, by introducing Cu2+ into the interstitial position of a ABO(3)-type perovskite, a 2 times higher protonic conductivity (1.9 X 10(-2) S cm(-1) at 700 degrees C) and low temperature (1200 C) sinterability were achieved for the BaCe0.68Zr0.1Y0.1M0.1CU0.02O3-delta (BCZYYC2) electrolyte, compared to the precursor electrolyte. Meanwhile, the modified BCZYYC2 also exhibits excellent chemical stability in high-temperature and high-humidity conditions, as well as good compatibility with the components of cell. When used as the electrolyte in reversible fuel cell (FC)/electrolysis cell (EC) operational modes, the reversible solid oxide cell with the BCZYYC2 electrolyte illustrates prominent FC (0.85 W cm(-2) at 700 degrees C) and EC (-1.96 A cm(-2) at 700 degrees C and 1.3 V) performances with high film-electrolyte conductivity (8.7 X 10(-3) S cm(-1) at 700 degrees C). Additionally, an obvious increase in current density is observed during the short-term stability test, which has shown great promise for their practical application.
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