Structural Design and Tuning of Cobalt-Free O3-NaKCuNi[FeMn]O ( = 0.01, 0.05, 0.1) Cathode for Ameliorated Na Storage.

Nowadays, the continuous advancement of sodium-ion battery technology has made it an important choice in the new energy field and promoted the development of lithium-ion batteries. The cycling stability of cathode materials for sodium-ion batteries at high voltage (>4.0 V) is still a key challenge.