1. NaxMV(PO4)3 (M = Mn, Fe, Ni) Structure and Properties for Sodium Extraction
- Author
-
Ye Zhu, Sen Xin, Hongcai Gao, Leigang Xue, Xujie Lü, Zhiming Cui, Yutao Li, Weidong Zhou, Gengtao Fu, and John B. Goodenough
- Subjects
Materials science ,Mechanical Engineering ,Sodium ,Extraction (chemistry) ,Inorganic chemistry ,chemistry.chemical_element ,Ionic bonding ,Synchrotron radiation ,Bioengineering ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Electrochemistry ,01 natural sciences ,Redox ,Cathode ,0104 chemical sciences ,law.invention ,chemistry ,law ,Fast ion conductor ,General Materials Science ,0210 nano-technology - Abstract
NASICON (Na+ super ionic conductor) structures of NaxMV(PO4)3 (M = Mn, Fe, Ni) were prepared, characterized by aberration-corrected STEM and synchrotron radiation, and demonstrated to be durable cathode materials for rechargeable sodium-ion batteries. In Na4MnV(PO4)3, two redox couples of Mn3+/Mn2+ and V4+/V3+ are accessed with two voltage plateaus located at 3.6 and 3.3 V and a capacity of 101 mAh g–1 at 1 C. Furthermore, the Na4MnV(PO4)3 cathode delivers a high initial efficiency of 97%, long durability over 1000 cycles, and good rate performance to 10 C. The robust framework structure and stable electrochemical performance makes it a reliable cathode materials for sodium-ion batteries.
- Published
- 2016
- Full Text
- View/download PDF