Advanced Materials, Vol.27, No.43, 6928-6928, 2015
Prototype Sodium-Ion Batteries Using an Air-Stable and Co/Ni-Free O-3-Layered Metal Oxide Cathode
A prototype rechargeable sodium-ion battery using an O-3-Na-0.90[Cu0.22Fe0.30Mn0.48] O-2 cathode and a hard carbon anode is demonstrated to show an energy density of 210 W h kg(-1), a round-trip energy efficiency of 90%, a high rate capability (up to 6C rate), and excellent cycling stability.