TY - JOUR
T1 - High-performance non-spinel cobalt-manganese mixed oxide-based bifunctional electrocatalysts for rechargeable zinc-air batteries
AU - Liu, Xien
AU - Park, Minjoon
AU - Kim, Min Gyu
AU - Gupta, Shiva
AU - Wang, Xiaojuan
AU - Wu, Gang
AU - Cho, Jaephil
N1 - Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - Development of efficient bifunctional electrocatalysts from earth abundant elements, simultaneously active for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), remains to be a grand challenge for electrocatalysis. Herein we firstly synthesized a new type of bifunctional catalyst (NCNT/CoxMn1-xO) consisting of non-spinel cobalt-manganese oxide supported on N-doped carbon nanotubes through a simple non-surfactant assistant hydrothermal method. This hybrid catalyst exhibits much higher OER activity than that of IrO2, and comparable ORR activity to Pt/C with identical onset potential (0.96V) in alkaline media. Furthermore, the NCNT/CoxMn1-xO catalyst was studied as a cathode in both primary and rechargeable zinc-air batteries demonstrating similar performance to commercial Pt/C or (Pt/C+IrO2), respectively. Primary zinc-air battery tests show a gravimetric energy density of 695WhkgZn-1, and the rechargeable battery exhibits a high round-trip efficiency evidenced by a low discharge-charge voltage gap (0.57V) at a current density of 7mAcm-2.
AB - Development of efficient bifunctional electrocatalysts from earth abundant elements, simultaneously active for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), remains to be a grand challenge for electrocatalysis. Herein we firstly synthesized a new type of bifunctional catalyst (NCNT/CoxMn1-xO) consisting of non-spinel cobalt-manganese oxide supported on N-doped carbon nanotubes through a simple non-surfactant assistant hydrothermal method. This hybrid catalyst exhibits much higher OER activity than that of IrO2, and comparable ORR activity to Pt/C with identical onset potential (0.96V) in alkaline media. Furthermore, the NCNT/CoxMn1-xO catalyst was studied as a cathode in both primary and rechargeable zinc-air batteries demonstrating similar performance to commercial Pt/C or (Pt/C+IrO2), respectively. Primary zinc-air battery tests show a gravimetric energy density of 695WhkgZn-1, and the rechargeable battery exhibits a high round-trip efficiency evidenced by a low discharge-charge voltage gap (0.57V) at a current density of 7mAcm-2.
KW - Carbon nanotubes
KW - Non-spinel cobalt-manganese oxide
KW - Oxygen reduction and evolution reactions
KW - Primary and rechargeable zinc air batteries
UR - https://www.scopus.com/pages/publications/84954552942
U2 - 10.1016/j.nanoen.2015.11.030
DO - 10.1016/j.nanoen.2015.11.030
M3 - Article
AN - SCOPUS:84954552942
SN - 2211-2855
VL - 20
SP - 315
EP - 325
JO - Nano Energy
JF - Nano Energy
ER -