O3-type sodium anion-redox cathodes show promise but are hard to synthesize due to unclear mechanisms. Here, authors elucidate the role of oxygen conditions, enabling O3-Na[Li1/3Mn2/3]O2 synthesis and developing Ti-substituted with capacities >190 mAh·g-1.
- Yixiao Qiu
- Qinzhe Liu
- Chao Xu