Superior rechargeability and efficiency of lithium-oxygen batteries: Hierarchical air electrode architecture combined with a soluble catalyst
- Superior rechargeability and efficiency of lithium-oxygen batteries: Hierarchical air electrode architecture combined with a soluble catalyst
- 임희대; 송혜린; 김진수; 권혁조; 배영준; 박규영; 홍지현; 김해겸; 김태우; 김용협; Xavier Lepro; Raquel Ovalle-Robles; Ray H. Baughman; 강기석
- Issue Date
- Angewandte Chemie international edition
- VOL 53, NO 15-3931
- The lithium– oxygen battery has the potential to deliver extremely high energy densities; however, the practical use of Li-O 2 batteries has been restricted because of their poor
cyclability and low energy efficiency. In this work, we report a novel Li-O 2 battery with high
reversibility and good energy efficiency using a soluble catalyst combined with a
hierarchical nanoporous air electrode. Through the porous three-dimensional network of the
air electrode, not only lithium ions and oxygen but also soluble catalysts can be rapidly
transported, enabling ultra-efficient electrode reactions and significantly enhanced catalytic
activity. The novel Li-O 2 battery, combining an ideal air electrode and a soluble catalyst,
can deliver a high reversible capacity (1000 mAh g− 1) up to 900 cycles with reduced
polarization (about 0.25 V).
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