Stability in water and electrochemical properties of the Na3V2(PO4)2F3-Na3(VO)2(PO4)2F solid solution

被引：58

作者：

Nguyen, Long H. B. ^{[1
,2
,7
]}

Broux, Thibault ^{[1
,2
,7
,8
]}

Camacho, Paula Sanz ^{[1
,7
]}

Denux, Dominique ^{[1
]}

Bourgeois, Lydie ^{[3
,4
]}

Belin, Stephanie ^{[5
]}

Iadecola, Antonella ^{[7
]}

Fauth, Francois ^{[6
]}

Carlier, Dany ^{[1
,7
]}

Olchowka, Jacob ^{[1
,7
]}

Masquelier, Christian ^{[2
,7
,8
]}

Croguennec, Laurence ^{[1
,7
,8
]}

机构：

[1] Univ Bordeaux, Bordeaux INP, CNRS, ICMCB UMR 5026, F-33600 Pessac, France

[2] Univ Picardie Jules Verne, CNRS UMR 7314, Lab Reactivite & Chim Solides, F-80039 Amiens 1, France

[3] Univ Bordeaux, ISM, Grp Spectroscopie Mol, F-33405 Talence, France

[4] Bordeaux INP, ISM, CNRS UMR 5255, F-33405 Talence, France

[5] SOLEIL Synchrotron, F-91192 Gif Sur Yvette, France

[6] CELLS ALBA Synchrotron, E-08290 Barcelona, Spain

[7] FR CNRS 3459, RS2E, Reseau Francais Stockage Electrochim Energie, F-80039 Amiens 1, France

[8] FR CNRS 3104, ALISTORE ERI European Res Inst, F-80039 Amiens 1, France

来源：

ENERGY STORAGE MATERIALS | 2019年 / 20卷

基金：

欧盟地平线“2020”;

关键词：

SODIUM-ION BATTERIES; HIGH-VOLTAGE CATHODE; ENERGY; OPERANDO; NAXCOO2; SYSTEM; FAMILY;

D O I：

10.1016/j.ensm.2019.04.010

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：

Polyanionic materials have been intensively studied as promising active materials for positive electrodes in Na-ion batteries thanks to their excellent stability upon cycling and the fast ionic mobility in their structural framework. Among them, Na3V2(PO4)(2)F-3 and Na-3(VO)(2)(PO4)(2)F are two of the most promising ones due to their high voltages for Na+-ion extraction and their high energy densities: 500 mWh g(-1) and 495mWh g(-1), respectively. Here, we study the formation mechanism as well as the stability of these phases in aqueous media and the possible use of a washing step in water in order to remove undesirable impurities formed during the synthesis. Furthermore, the origin of the extra capacity observed at the high voltage region for Na3V2(PO4)(2)F-3 and Na3V2(PO4)(2)F1.5O1.5 was studied by operando X-ray absorption spectroscopy.

引用

页码：324 / 334

页数：11

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