| 초록 |
Li–O2 batteries are one of the promising next-generation energy storage systems because of their superior theoretical capacities.1 However, they have a serious limitation regarding the high overvoltage upon charging that results from the low conductivity of the discharge product. Thus, various redox mediators have been widely studied to reduce the charge overvoltage, which should promote the oxidation of Li2O2. At the same time, unfortunately, redox mediators degrade the Li metal anode.2 Here, we proposed the effective method to prevent the migration of the RM toward the anode side by using a separator that is modified with a negatively charged polymer. When DMPZ (5,10-dihydro-5,10-dimethylphenazine) is used as an RM, it is found that the modified separator suppresses the migration of DMPZ toward the counter electrode of the Li metal anod |
