MnO2 Nanotubes Synthesized with One-step Hydrothermal Method as Efficient Bi-functional Cathode Catalyst for a Rechargeable Zinc-air Battery

DOI

10.2991/iceesd-17.2017.168How to use a DOI?

Keywords

Bifunctional catalyst, MnO2 nanotube catalysts, rechargeable zinc-air battery.

Abstract

This paper reports the preparation and electro-catalytic activity of MnO2 nanotube catalysts for both oxygen reduction reaction (ORR) and oxygen evolution reduction (OER) in alkaline media. The catalysts were synthesized by a simple hydrothermal method under controlling the different temperatures. Results of electrochemical characterization with emphasis on the activity of the catalyst are presented, which was demonstrated by cyclic voltammetry (CV) and linear sweep voltammetry (LSV) employing a rotating disk electrode (RDE) technique. The experiments show that the as-prepared MnO2 catalyst with nanotube structure exhibited high electro-catalytic activity and stability during battery discharge, charge and cycling processes in 6 M KOH electrolyte. The primary Zn-air battery showed a discharge peak power density ~293 mW cm-2, which corresponds to the energy density ~725 mA hg-1. The rechargeable Zn-air battery exhibited a small charge-discharge voltage polarization of ~0.7 V at 10 mA cm-2, high reversibility and stability over short charge and discharge cycles, and ~1.1 V for a long charge and discharge cycles test.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Haoran Li
AU  - Xuemei Li
AU  - Qi Nie
AU  - Keryn Lian
AU  - Jinli Qiao
PY  - 2017/04
DA  - 2017/04
TI  - MnO2 Nanotubes Synthesized with One-step Hydrothermal Method as Efficient Bi-functional Cathode Catalyst for a Rechargeable Zinc-air Battery
BT  - Proceedings of the 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017)
PB  - Atlantis Press
SP  - 920
EP  - 924
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceesd-17.2017.168
DO  - 10.2991/iceesd-17.2017.168
ID  - Li2017/04
ER  -