Topochemical Synthesis of Sodium Metal Phosphate Olivines for Sodium-Ion Batteries

被引：295

作者：

Lee, Kyu Tae ^{[1
]}

Ramesh, T. N. ^{[1
]}

Nan, F. ^{[2
]}

Botton, G. ^{[2
]}

Nazar, Linda F. ^{[1
]}

机构：

[1] Univ Waterloo, Dept Chem, Waterloo, ON N2L 3G1, Canada

[2] McMaster Univ, Dept Mat Sci & Engn, Hamilton, ON L8S 4L7, Canada

来源：

CHEMISTRY OF MATERIALS | 2011年 / 23卷 / 16期

基金：

加拿大自然科学与工程研究理事会;

关键词：

olivine; Na-ion battery; topotactic; low-temperature synthesis; cathode material; ELECTROCHEMICAL INSERTION; CRYSTAL-STRUCTURE; RECHARGEABLE BATTERIES; CATHODE MATERIALS; FLUOROPHOSPHATE; LITHIUM; NA; PHASES; SPINEL; CARBON;

D O I：

10.1021/cm200450y

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

New metastable olivine phases of sodium metal phosphates, Na[Mn1-xMx]PO4 (M = Fe, Ca, Mg), nanorocls are synthesized by a simple solid-state reaction at low temperature (<= 100 degrees C) by means of a topotactic molten salt reaction that converts NH4[Mn1-xMx]PO4 center dot H2O (M = Fe, Ca, Mg) to Na[Mn1-xMx]PO4. Their crystal structures are characterized via XRD Rietveld refinement and electron diffraction. A full range of solid solution behavior was observed for olivine Na1-xMn0.5Fe0.5PO4, in contrast to that of LiMPO4 (M = Fe, Mn) olivine materials, and is ascribed to ion size effects. The solid solution behavior of NaMn0.5Fe0.5PO4 was confirmed by electrochemical characterization.

引用

页码：3593 / 3600

页数：8

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