Kalyoncuoglu, BurcuOzgul, MetinAltundag, SebahatAltin, EmineMoeez, IqraChung, Kyung YoonArshad, Muhammad2024-08-042024-08-0420232574-0962https://doi.org/10.1021/acsaem.3c02134https://hdl.handle.net/11616/101712The key challenges of Na-ion batteries are to design structurally stable electrodes and reach high-enough capacities with full-cells. In this study, we report the positive effects of Ag substitution/addition to Na0.67MnO2. We determined that some of the intended Ag was incorporated into the structure, while the rest remained in metallic form. Ag substitution/addition increases the capacity (208 mA h/g at C/3 rate) and improves the cycle life of Na0.67MnO2 (42% capacity fade with 100 cycles) in half-cells. We attribute these results to an enlarged interlayer spacing due to the large ionic radius of Ag, a suppressed Jahn-Teller effect due to the reduced number of Mn3+ ions, and an increased electrical conductivity due to the presence of metallic Ag. We also produced full-cells with an electrochemically presodiated hard carbon anode. We reached a very high initial capacity of 190 mA h/g at the C/3 rate, showing that Ag substituted/added Na0.67MnO2 is a promising candidate for commercialization of Na-ion batteries.eninfo:eu-repo/semantics/closedAccessNa-ion cathodeP2 type cathodeNa0.67MnO2Article623119931200210.1021/acsaem.3c021342-s2.0-85179170682Q1WOS:001123856000001Q2