TY - JOUR
T1 - Honeycomb-like perovskite oxide electrocatalyst for a hybrid Li-air battery
AU - Ju, Young Wan
AU - Yoo, Seonyoung
AU - Guo, Limin
AU - Kim, Changmin
AU - Inoishi, Atsushi
AU - Jeong, Hu Young
AU - Shin, Jeeyoung
AU - Ishihara, Tatsumi
AU - Yim, Sung Dae
AU - Kim, Guntae
N1 - Publisher Copyright:
© 2015 The Electrochemical Society. All rights reserved.
PY - 2015
Y1 - 2015
N2 - Honeycomb-like Nd0.7Sr0.3CoO3-δ has been successfully prepared with a PMMA hard-template for an energy storage system and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and nitrogen adsorption-desorption measurements. The prepared 3-dimensionally (3-D) ordered mesoporous Nd0.7Sr0.3CoO3-δ(3DOM-NSC) has a well-developed mesoporous structure and has high specific surface area (22.0 m2 g-1). The catalytic activity for the oxygen reduction reaction (ORR) in 0.1 M KOH solution has been studied by using a rotating-ring-disk electrode (RRDE). In the ORR test, a limiting current density of 5.83 mA cm-2 at 0.7 V (vs. Hg/HgO) with 1600 rpm was obtained, a value comparable with that of Pt/C. Moreover, the ORR mainly favors a direct four-electron pathway. Consequently, the high electrocatalytic activity and mesoporous structure result in stable, excellent performance in a hybrid Li-air cell.
AB - Honeycomb-like Nd0.7Sr0.3CoO3-δ has been successfully prepared with a PMMA hard-template for an energy storage system and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and nitrogen adsorption-desorption measurements. The prepared 3-dimensionally (3-D) ordered mesoporous Nd0.7Sr0.3CoO3-δ(3DOM-NSC) has a well-developed mesoporous structure and has high specific surface area (22.0 m2 g-1). The catalytic activity for the oxygen reduction reaction (ORR) in 0.1 M KOH solution has been studied by using a rotating-ring-disk electrode (RRDE). In the ORR test, a limiting current density of 5.83 mA cm-2 at 0.7 V (vs. Hg/HgO) with 1600 rpm was obtained, a value comparable with that of Pt/C. Moreover, the ORR mainly favors a direct four-electron pathway. Consequently, the high electrocatalytic activity and mesoporous structure result in stable, excellent performance in a hybrid Li-air cell.
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U2 - 10.1149/2.0311514jes
DO - 10.1149/2.0311514jes
M3 - Article
AN - SCOPUS:84946014405
VL - 162
SP - A2651-A2655
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
SN - 0013-4651
IS - 14
ER -
