High-performance non-spinel cobalt-manganese mixed oxide-based bifunctional electrocatalysts for rechargeable zinc-air batteries

被引：184

作者：

Liu, Xien ^{[1
]}

Park, Minjoon ^{[1
]}

Kim, Min Gyu ^{[2
]}

Gupta, Shiva ^{[3
]}

Wang, Xiaojuan ^{[3
]}

Wu, Gang ^{[3
]}

Cho, Jaephil ^{[1
]}

机构：

[1] Natl Inst Sci & Technol (UNIST), Sch Energy & Chem Engn, Dept Energy Engn, Ulsan 689798, South Korea

[2] PAL, Beamline Res Div, Pohang 790784, South Korea

[3] SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA

来源：

NANO ENERGY | 2016年 / 20卷

关键词：

Non-spinet cobalt-manganese oxide; Carbon nanotubes; Oxygen reduction and evolution reactions; Primary and rechargeable zinc air batteries; NONPRECIOUS METAL CATALYST; OXYGEN REDUCTION; WATER OXIDATION; CO3O4; NANOCRYSTALS; CATHODE CATALYSTS; CARBON NANOTUBES; EVOLUTION; GRAPHENE; HYBRID; NANOPARTICLES;

D O I：

10.1016/j.nanoen.2015.11.030

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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-spinet cobalt-manganese oxide supported on N-doped carbon nanotubes through a simple non-surfactant assistant hydro thermal method. This hybrid catalyst exhibits much higher OER activity than that of IrO2, and comparable ORR activity to Pt/C with identical onset potential (0.96 V) 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 695 W h kg(zn)(-1), and the rechargeable battery exhibits a high round-trip efficiency evidenced by a low discharge-charge voltage gap (0.57 V) at a current density of 7 mA cm(-2). (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：315 / 325

页数：11