Issue 12, 2013

A new catalyst-embedded hierarchical air electrode for high-performance Li–O2 batteries

Abstract

The Li–O2 battery holds great promise as an ultra-high-energy-density device. However, its limited rechargeability and low energy efficiency remain key barriers to its practical application. Herein, we demonstrate that the ideal electrode morphology design combined with effective catalyst decoration can enhance the rechargeability of the Li–O2 battery over 100 cycles with full discharge and charge. An aligned carbon structure with a hierarchical micro-nano-mesh ensures facile accessibility of reaction products and provides the optimal catalytic conditions for the Pt catalyst. The new electrode is highly reversible even at the extremely high current rate of 2 A g−1. Moreover, we observed clearly distinct morphologies of discharge products when the catalyst is used. The effect of catalysts on the cycle stability is discussed.

Graphical abstract: A new catalyst-embedded hierarchical air electrode for high-performance Li–O2 batteries

Supplementary files

Article information

Article type
Communication
Submitted
05 Jun 2013
Accepted
25 Sep 2013
First published
26 Sep 2013

Energy Environ. Sci., 2013,6, 3570-3575

A new catalyst-embedded hierarchical air electrode for high-performance Li–O2 batteries

H. Lim, H. Song, H. Gwon, K. Park, J. Kim, Y. Bae, H. Kim, S. Jung, T. Kim, Y. H. Kim, X. Lepró, R. Ovalle-Robles, R. H. Baughman and K. Kang, Energy Environ. Sci., 2013, 6, 3570 DOI: 10.1039/C3EE41910J

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