XPS and SEM-EDX Study of Electrolyte Nature Effect on Li Electrode in Lithium Metal Batteries

被引:72
作者
Grissa, Rabeb [1 ]
Fernandez, Vincent [1 ]
Fairley, Neal [2 ]
Hamon, Jonathan [1 ]
Stephant, Nicolas [1 ]
Rolland, Julien [3 ]
Bouchet, Renaud [3 ]
Lecuyer, Margaud [4 ]
Deschamps, Marc [4 ]
Guyomard, Dominique [1 ]
Moreau, Philippe [1 ]
机构
[1] Univ Nantes, CNRS, Inst Mat Jean Rouxel IMN, 2 Rue Houssiniere,BP 32229, F-44322 Nantes 3, France
[2] Casa Software Ltd, Bay House,5 Grosvenor Terrace, Teignmouth TQ14 8NE, Devon, England
[3] Univ Grenoble Alpes, CNRS, LEPMI, Inst Engn Grenoble INP, F-38402 St Martin Dheres, France
[4] Blue Solut, F-29556 Ergue Gaberic 9, Quimper, France
关键词
lithium batteries; XPS; XPS imaging; DEG; DPG; PEG; ELECTRODE/ELECTROLYTE INTERFACE; PHOTOELECTRON; SPECTROMICROSCOPY; CARBONATE; LIQUID; IMAGES; ANODE;
D O I
10.1021/acsaem.8b01256
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
Understanding the solid electrolyte interphase (SEI) in lithium batteries is very important to face the major safety issue of lithium dendritic growth during battery charge. The aim of this work is to study the thickness and the chemical nature of the SEI by XPS, as well as their influence on the electrochemical performance of the battery for different liquid organic electrolytes. XPS imaging is also used in this work to get a chemical mapping of the SEI layer components formed on the metallic lithium electrode surface cycled in different conditions. Data processing based on the principal component analysis (PCA) method has been conducted in order to illustrate the SEI layer heterogeneities. The obtained results are compared with energy-dispersive X-ray spectroscopy (EDX) mapping. Thereby, the benefits and the precision of the XPS imaging technique to identify chemical compounds distribution have been highlighted. These different analyses have led to a better knowledge of the redox processes occurring at the top surface of lithium metal electrodes cycled in different liquid electrolytes.
引用
收藏
页码:5694 / 5702
页数:17
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