Functional Binder for High-performance Li-O2 Batteries
In the present work, the polypyrrole (PPy), as a conductive polymer, is for the first time introduced as functional binder of air cathode for lithium-oxygen batteries by a self-assembly process.Most of the carbon particles in the air cathode are found to be uniformly congregated with each other by the in-situ polymerized conductive polymer PPy, which affords a lower electrode resistance and higher electrode integrity.Replacement of the conventional inactive PVDF binder by the functional conductive polymer in the cathode, which not only acts as the binder and conductor, but also functions as a host for fast Li-ion insertion/extraction, has demonstrated its effectiveness in improving the cycle-efficiency, specific capacity, rate capability and cycling stability of the lithium-oxygen cells.In comparison with the PVDF binder, the PPy/C cathode demonstrates ~2.6 times (2626.3 mA h g-1 vs.1005.8 mA h g-1) and ~5.3 times (1816.4mA h g-1 vs.345.6 mA h g-1) higher capacity at 0.1 mA cm-2 and 0.5 mA cm-2respectively.
polypyrrole binder air electrode lithium-air batteries
Yanming Cui Zhaoyin Wen Yan Lu Meifen Wu Xiao Liang Jun Jin
CAS Key Laboratory of Energy Transforming Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P.R.China
国内会议
宁波
英文
742-757
2014-11-11（万方平台首次上网日期，不代表论文的发表时间）