%0 Journal Article
%T MOF-Based Separator in an Li每O2 Battery: An Effective Strategy to Restrain the Shuttling of Dual Redox Mediators
%J -
%D 2018
%R https://doi.org/10.1021/acsenergylett.8b00014
%X Tuning the electrochemical formation/decomposition of Li2O2 from the circumscribed surface pathways to the solution ones, the dual redox mediator (RM) strategy largely promotes the discharge capacity and reduces the charge overpotential in aprotic Li每O2 batteries, revealing a promising strategy to realize anticipated high specific energy cycling. However, both RM-induced Li degradation and electron shuttling between the cathode and anode become the become the inherent defects, resulting in poor sustainability. Here, with a narrow pore size window, a metal每organic framework (MOF)-based separator has been proposed, which acts as a RM molecule sieve to restrain the shuttling. By maximizing the advantages of the dual RM strategy, the Li每O2 cell reveals a prolonged cycled life (100 cycles, 5000 mAh g每1) at high current rate (1000 mA g每1). Moreover, the Li每O2 pouch cell fabricated by the flexible MOF-based separator exhibits the potential for the development of large-scale energy storage devices
%U https://pubs.acs.org/doi/10.1021/acsenergylett.8b00014