Center for Nanoparticle Research Institute for Basic Science (IBS), Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul 151-742 (Republic of Korea).
Angew Chem Int Ed Engl. 2014 Apr 7;53(15):3926-31. doi: 10.1002/anie.201400711. Epub 2014 Mar 5.
The lithium-oxygen battery has the potential to deliver extremely high energy densities; however, the practical use of Li-O2 batteries has been restricted because of their poor cyclability and low energy efficiency. In this work, we report a novel Li-O2 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-O2 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).
锂-氧电池具有极高的能量密度潜力；然而，由于其循环性能差和能量效率低，Li-O2 电池的实际应用受到限制。在这项工作中，我们报告了一种使用可溶性催化剂和分级纳米多孔空气电极的新型高可逆性和良好能量效率的 Li-O2 电池。通过空气电极的多孔三维网络，不仅锂离子和氧气，而且可溶性催化剂都可以快速传输，从而实现超高效率的电极反应和显著增强的催化活性。新型 Li-O2 电池结合理想的空气电极和可溶性催化剂，可提供高达 900 次循环的高可逆容量（1000 mAh g(-1)），并降低了极化（约 0.25 V）。
