Cathode Surface-Induced, Solvation-Mediated, Micrometer-Sized Li<sub>2</sub> O<sub>2</sub> Cycling for Li-O<sub>2</sub> Batteries.

Xu, Ji-Jing; Chang, Zhi-Wen; Wang, Ying; Liu, Da-Peng; Zhang, Yu; Zhang, Xin-Bo · Adv Mater · 2016

basic_science · Level V

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Abstract

The "nonsticky" surface of a highly stable RuO<sub>2</sub> /carbon nanotube cathode enhances the formation and decomposition of cathode surface-induced, solvation-mediated, micrometer-sized discharge products Li<sub>2</sub> O<sub>2</sub> in Li-O<sub>2</sub> batteries and thus significantly improves the specific capacity, overpotentials, and cycle life. These findings contribute to a new understanding how the cathode surface controls Li-O<sub>2</sub> electrochemistry.