Redox activity of argyrodite Li6PS5Cl electrolyte in all-solid-state Li-ion battery: An XPS study

被引：279

作者：

Auvergniot, Jeremie ^{[1
,2
]}

Cassel, Alice ^{[2
]}

Foix, Dominique ^{[1
,3
]}

Viallet, Virgine ^{[2
,3
]}

Seznec, Vincent ^{[2
,3
]}

Dedryvere, Remi ^{[1
,3
]}

机构：

[1] Univ Pau & Pays Adour, IPREM, CNRS UMR 5254, Helioparc,2 Ave Pierre Angot, F-64053 Pau 9, France

[2] Univ Picardie Jules Verne, LRCS, CNRS UMR 7314, 33 Rue St Leu, F-80039 Amiens, France

[3] FR CNRS 3459, RS2E, Amiens, France

来源：

SOLID STATE IONICS | 2017年 / 300卷

关键词：

All-solid-state Li-ion battery; Solid electrolyte; Argyrodite Li6PS5Cl; Electrode/electrolyte interfaces; XPS; Auger; LITHIUM METAL ANODE; ELECTROCHEMICAL PROPERTIES; LICOO2; GLASS; LI10GEP2S12; PERFORMANCE; CONDUCTOR;

D O I：

10.1016/j.ssi.2016.11.029

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：

Argyrodite Li6PS5Cl is a good candidate as solid electrolyte for bulk all-solid-state Li-ion batteries due to its high ionic conductivity and its good processability, although it shows some interface reactivity towards electrode active materials. In this work we have cycled LiCoO2/Li6PS5Cl/Li4Ti5O12 full cells and analyzed the interfacial mechanisms by surface-sensitive characterization techniques: Auger Electron Spectroscopy (AES) and X-ray Photoelectron Spectroscopy (XPS). We show that Li6PS5Cl has an electrochemical redox activity in the positive electrode. It is partially oxidized into LiCl, P2S5 and polysulfides Li2Sn upon charge, with some reversibility upon discharge. Li6PS5Cl also reacts with LiCoO2 upon cycling, leading to the formation of phosphates at the interface. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：78 / 85

页数：8

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