A Solution-Phase Bifunctional Catalyst for Lithium鈥揙xygen Batteries

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• 作者：Dan Sun ; Yue Shen ; Wang Zhang ; Ling Yu ; Ziqi Yi ; Wei Yin ; Duo Wang ; Yunhui Huang ; Jie Wang ; Deli Wang ; John B. Goodenough
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：June 25, 2014
• 年：2014
• 卷：136
• 期：25
• 页码：8941-8946
• 全文大小：466K
• ISSN：1520-5126

文摘

A lithium鈥搊xygen 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)^{鈭?/sup> 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鈥揳ir rechargeable battery.}