NaFe2PO4(SO4)2: a potential cathode for a Na-ion battery

被引：76
|
作者：
Shiva, Konda [1 ,2 ]
Singh, Preetam [1 ,2 ,3 ]
Zhou, Weidong [1 ,2 ]
Goodenough, John B. [1 ,2 ]
机构：
[1] Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA
[2] Univ Texas Austin, Mat Sci & Engn Program, Austin, TX 78712 USA
[3] Indian Inst Technol BHU, Dept Ceram Engn, Varanasi 221005, Uttar Pradesh, India
来源：
ENERGY & ENVIRONMENTAL SCIENCE | 2016年 / 9卷 / 10期
关键词：
LITHIUM INSERTION; SODIUM; INTERCALATION;
D O I：
10.1039/c6ee01093h
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Hexagonal Na3Zr2PO4(SiO4)(2) is a well-known fast Na+ conductor commonly referred to as NASICON. The low cost and wide availability of sodium invites exploration of Na+-insertion cathodes with the hexagonal NASICON framework structure. Here we report a low-temperature synthesis of NaFe2PO4(SO4)(2) with the same host framework as NASICON and its performance as the cathode of a Na/Na1+xFe2PO4(SO4)(2) cell operating on the Fe3+/Fe2+ redox couple. The cell provides a single-phase reaction having a capacity approaching 100 mA h g(-1) at 0.1C after 50 cycles over the voltage range 2 <= V <= 4 V with a coulomb efficiency approaching 100%. An increase in capacity with cycling is the result of aging of an unoptimized electrode morphology.
引用
收藏
页码：3103 / 3106
页数：4
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