标题：Syntheses, structure and properties of a new Fillowite-type compound Na0.48Mn1.22PO4
作者：Zhao, Pan; Feng, Kai; Wang, Yonggang; Gao, Jianhua
作者机构：[Zhao, Pan; Gao, Jianhua] Northwest Univ, Sch Phys, Dept Mat Phys, Xian 710069, Shaanxi, Peoples R China.; [Feng, Kai] Chinese Acad Sci, Dalian Inst 更多
通讯作者地址：[Gao, JH]Northwest Univ, Sch Phys, Dept Mat Phys, Xian 710069, Shaanxi, Peoples R China.
来源：JOURNAL OF ALLOYS AND COMPOUNDS
关键词：Fillowite; Single-crystal structure; Polyanionic cathode
摘要：Searching for excellent polyanionic cathode materials for Na-ion batteries attract considerable attention in recent years. Herein, a new polyanionic cathode candidate Na0.48Mn1.22PO4, crystallizing in the space group R-3 with the unit cell parameters of a = 15.3672 (17) angstrom, c = 43.503 (5) angstrom and V = 8896.91 (2) angstrom(3), belonging to the Fillowite-type structure, is reported for the first time. In the structure of Na0.48Mn1.22PO4, the Mn-O connectivity exhibits three-dimensional Mn-O-Mn network. More interestingly, some Mn5O6 clusters embed in the network. Electrochemical tests revealed that Na0.48Mn1.22PO4 can be very effectively cycled against a Na metal electrode with an average voltage of 3.35 V. In addition, The XANES and magnetic tests were also employed for the characterization of the material. (C) 2017 Elsevier B.V. All rights reserved.