Issue 7, 2014

ε-MnO2 nanostructures directly grown on Ni foam: a cathode catalyst for rechargeable Li–O2 batteries

Abstract

A sponge-like ε-MnO2 nanostructure was synthesized by direct growth of ε-MnO2 on Ni foam through a facile electrodeposition route. When applied as a self-supporting, binder-free cathode material for rechargeable nonaqueous lithium–oxygen batteries, the ε-MnO2/Ni electrode exhibits considerable high-rate capability (discharge capacity of ∼6300 mA h g−1 at a current density of 500 mA g−1) and enhanced cyclability (exceeding 120 cycles) without controlling the discharge depth. The superior performance is proposed to be associated with the 3D nanoporous structures and abundant oxygen defects as well as the absence of side reactions related to carbon-based conductive additives and binders.

Graphical abstract: ε-MnO2 nanostructures directly grown on Ni foam: a cathode catalyst for rechargeable Li–O2 batteries

Supplementary files

Article information

Article type
Communication
Submitted
01 Dec 2013
Accepted
14 Jan 2014
First published
28 Feb 2014

Nanoscale, 2014,6, 3522-3525

ε-MnO2 nanostructures directly grown on Ni foam: a cathode catalyst for rechargeable Li–O2 batteries

X. Hu, X. Han, Y. Hu, F. Cheng and J. Chen, Nanoscale, 2014, 6, 3522 DOI: 10.1039/C3NR06361E

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