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Bouayad, H., Wang, Z., Dupre, N., Dedryvere, R., Foix, D., Franger, S., Martin, J. .-F., Boutafa, L., Patoux, S., Gonbeau, D. & Guyomard, D. (2014) Improvement of Electrode/Electrolyte Interfaces in High-Voltage Spinel Lithium-Ion Batteries by Using Glutaric Anhydride as Electrolyte Additive. J. Phys. Chem. C, 118 4634–4648. 
Added by: Florent Boucher (2016-04-29 09:26:44)
Type de référence: Article
DOI: 10.1021/jp5001573
Numéro d'identification (ISBN etc.): 1932-7447
Clé BibTeX: Bouayad2014
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Catégories: ST2E
Mots-clés: cathode materials, cells, deintercalation, layers, MAS NMR, Oxides, rechargeable li-batteries, spectroscopy, succinic anhydride, transition
Créateurs: Bouayad, Boutafa, Dedryvere, Dupre, Foix, Franger, Gonbeau, Guyomard, Martin, Patoux, Wang
Collection: J. Phys. Chem. C
Consultations : 9/462
Indice de consultation : 2%
Indice de popularité : 0.5%
Résumé     
High-voltage spinet oxides combined with Li4Ti5O12 result in 3 V Li-ion batteries with a high power capability, but electrochemical performances are limited by electrode/electrolyte interfacial reactivity at high potential. We have investigated glutaric anhydride (GA) as an electrolyte additive to improve the performances of LiNi0.4Mn1.6O4/ Li4Ti5O12 cells. We showed that GA efficiently reduces both the capacity fading upon cycling and the self-discharge. From X-ray photoelectron spectroscopy (XPS), nuclear magnetic resonance (NMR), and electrochemical impedance spectroscopy (EIS) measurements, we showed that GA reduces salt (LiPF6) degradation. Addition of 2% GA in the electrolyte results in a passivation film at the surface of both electrodes, which is mainly composed of organic compounds resulting from degradation of GA. The film is much thicker but less resistive due to a better ionic conductivity, and behaves like a polymer electrolyte interface.
Added by: Florent Boucher  
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