title: NaxMV(PO4)3(M = Mn, Fe, Ni) Structure and Properties for Sodium Extraction.
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-1at 1 C. Furthermore, the Na4MnV(PO4)3cathode 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.
authors.affiliation: Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712, United States.
authors.forename: Weidong
authors.initials: W
authors.lastname: Zhou
authors.affiliation: Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712, United States.
authors.forename: Leigang
authors.initials: L
authors.lastname: Xue
authors.affiliation: Earth and Environmental Sciences Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States.
authors.forename: Xujie
authors.initials: X
authors.lastname: Lü
authors.affiliation: Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712, United States.
authors.forename: Hongcai
authors.initials: H
authors.lastname: Gao
authors.affiliation: Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712, United States.
authors.forename: Yutao
authors.initials: Y
authors.lastname: Li
authors.affiliation: Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712, United States.
authors.forename: Sen
authors.initials: S
authors.lastname: Xin
authors.affiliation: Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712, United States.
authors.forename: Gengtao
authors.initials: G
authors.lastname: Fu
authors.affiliation: Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712, United States.
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Cui
authors.affiliation: Department of Applied Physics, The Hong Kong Polytechnic University , Kowloon, Hong Kong.
authors.forename: Ye
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712, United States.
authors.forename: John B
authors.initials: JB
authors.lastname: Goodenough
keywords: Na+ transport; STEM; Sodium cathodes; framework oxide; manganese oxidation