Enzyme-Inspired Room-Temperature Lithium–Oxygen Chemistry via Reversible Cleavage and Formation of Dioxygen Bonds |
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| Authors: | Chengyi Wang Dr Zihe Zhang Weiwei Liu Qinming Zhang Dr Xin-Gai Wang Dr Zhaojun Xie Prof Zhen Zhou |
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| Institution: | School of Materials Science and Engineering, Institute of New Energy Material Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center (ReCast), Nankai University, Tianjin, 300350 China |
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| Abstract: | Li-O2 batteries are promising energy storage systems due to their ultra-high theoretical capacity. However, most Li-O2 batteries are based on the reduction/oxidation of Li2O2 and involve highly reactive superoxide and peroxide species that would cause serious degradation of cathodes, especially carbon-based materials. It is important to explore lithium-oxygen reactions and find new Li-O2 chemistry which can restrict or even avoid the negative influence of superoxide/peroxide species. Here, inspired by enzyme-catalyzed oxygen reduction/oxidation reactions, we introduce a copper(I) complex 3 N-CuI (3 N=1,4,7-trimethyl-1,4,7-triazacyclononane) to Li-O2 batteries and successfully modulate the reaction pathway to a moderate one on reversible cleavage/formation of O?O bonds. This work demonstrates that the reaction pathways of Li-O2 batteries could be modulated by introducing an appropriate soluble catalyst, which is another powerful choice to construct better Li-O2 batteries. |
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| Keywords: | copper Li-O2 batteries oxygen evolution reaction oxygen reduction reaction soluble catalysts |
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