دورية
An Efficient Oxygen Evolution Catalyst for Hybrid Lithium Air Batteries: Almond Stick Type Composite of Perovskite and Cobalt Oxide
| العنوان: | An Efficient Oxygen Evolution Catalyst for Hybrid Lithium Air Batteries: Almond Stick Type Composite of Perovskite and Cobalt Oxide |
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| المؤلفون: | Gwon, Ohhun, Kim, Changmin, Kwon, Ohhun, Young, Hu, Park, Ku, Shin, Jeeyoung, and, Wan Ju, Kim, Guntae |
| المصدر: | Journal of the Electrochemical Society; January 2016, Vol. 163 Issue: 9 pA1893-A1897, 5p |
| مستخلص: | We investigated the electrochemical composite effect between cobalt oxide and Nd0.5Sr0.5CoO3-d (Co-NSC). A double phase Co-NSC composite was successfully synthesized by a new synthesis process rather than a single phase Nd0.5Sr0.5Co1.1O3-d perovskite. The composite has good catalytic activity, high number of transferred electrons (3.9) compatible with Pt/C, and low concentration of the peroxide species (HO[?]2) yields (<5%). Also, it shows the outperformed onset potential (0.576 V vs. Hg/HgO) of the oxygen evolution reaction (OER) at [?]2.0 mA cm[?]2, indicating higher current density than perovskite related catalysts such as Ba0.5Sr0.5Co0.8Fe0.2O3-d (BSCF), La1.7Sr0.3NiO4 (LSN), LaNiO3 (LNO) and the state-of-the-art rutile IrO2. The good catalytic activity of Co-NSC is ascribed to the higher amount of Co3+ cations and higher Oad/Olattice ratio. Interestingly, the cyclic performance of the composite is also remarkably stable without observable degradation in a hybrid lithium air cell. |
| قاعدة البيانات: | Supplemental Index |
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