A Solution-Phase Bifunctional Catalyst for Lithium–Oxygen Batteries
Journal of the American Chemical Society2014Vol. 136(25), pp. 8941–8946
Citations Over TimeTop 1% of 2014 papers
Dan Sun, Yue Shen, Wang Zhang, Ling Yu, Ziqi Yi, Wei Yin, Duo Wang, Yunhui Huang, Jie Wang, Deli Wang, John B. Goodenough
Abstract
A lithium-oxygen battery would deliver the highest energy density of a rechargeable battery, but the multiphase electrochemical reaction on the air cathode has difficulty proceeding when operated with only solid catalysts. We report here the organic-electrolyte-dissolved iron phthalocyanine (FePc) as a shuttle of (O2)(-) species and electrons between the surface of the electronic conductor and the insulator Li2O2 product of discharge. The Li2O2 is observed to grow and decompose without direct contact with carbon, which greatly enhances the electrochemical performance. Our results signal that the use of molecular shuttles that are catalytically active may prove to be enablers of a practical lithium-air rechargeable battery.
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