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Anionic Doping
In article number 2109694, Hong Yu, Cheng‐Feng Du, Xing‐Long Wu, and co‐workers develop Cl‐doped Na3V2(PO4)2O2F (NVPO2−xClxF) as superior cathode material for sodium‐ion batteries. In NVPO2−xClxF, Cl doping tunes the electronic structure and causes the electron redistribution on vanadium center/dangling anions. As a result, a revised redox behavior of vanadium and increased Na+‐ diffusivity/electrochemical...
Polyanionic transition metal polyphosphate (TMPO)‐type Na3V2(PO4)2O2F (NVPO2F) is promising as cathode for large‐scale sodium‐ion batteries (SIBs) on account of its considerable capacity and highly stable structure. However, the redox of transition metal and phase transitions along with the (de)intercalation of Na+ lead to its slow kinetics and inferior rate performance. Herein, chlorine (Cl) is applied...
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