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

Title
A new catalyst-embedded hierarchical air electrode for high-performance Li-O2 batteries
Authors
임희대송혜린권혁조박규영김진수배영준김형섭정성균김태우김용협Xavier LeproRaquel Ovalle-RoblesRay H. Baughman강기석
Issue Date
2013-12
Publisher
Energy & environmental science
Citation
VOL 6, NO 12-3575
Abstract
The Li– O2 battery holds great promise as an ultra-high-energydensity 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 g1. Moreover, we observed clearly distinct morphologies of discharge products when the catalyst is used. The effect of catalysts on the cycle stability is discussed.
URI
http://pubs.kist.re.kr/handle/201004/67568
ISSN
1754-5692
Appears in Collections:
KIST Publication > Article
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