NaxMV(PO4)3 (M = Mn, Fe, Ni) Structure and Properties for Sodium Extraction

Weidong Zhou; Leigang Xue; Xujie Lü; Hongcai Gao; Yutao Li; Sen Xin; Gengtao Fu; Zhiming Cui; Ye Zhu; John B Goodenough

doi:10.1021/acs.nanolett.6b04044

Na_xMV(PO₄)₃ (M = Mn, Fe, Ni) Structure and Properties for Sodium Extraction

Nano Lett. 2016 Dec 14;16(12):7836-7841. doi: 10.1021/acs.nanolett.6b04044. Epub 2016 Nov 10.

Authors

Weidong Zhou¹, Leigang Xue¹, Xujie Lü², Hongcai Gao¹, Yutao Li¹, Sen Xin¹, Gengtao Fu¹, Zhiming Cui¹, Ye Zhu³, John B Goodenough¹

Affiliations

¹ Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712, United States.
² Earth and Environmental Sciences Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States.
³ Department of Applied Physics, The Hong Kong Polytechnic University , Kowloon, Hong Kong.

PMID: 27960482
DOI: 10.1021/acs.nanolett.6b04044

Abstract

NASICON (Na⁺ super ionic conductor) structures of Na_xMV(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.

Keywords: Na+ transport; STEM; Sodium cathodes; framework oxide; manganese oxidation.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.
Research Support, Non-U.S. Gov't