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Improvement of Electrode/Electrolyte Interfaces in High-Voltage Spinel Lithium-Ion Batteries by Using Glutaric Anhydride as Electrolyte Additive

Abstract : 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.
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https://hal.archives-ouvertes.fr/hal-00989014
Contributor : Richard Baschera <>
Submitted on : Friday, May 9, 2014 - 3:15:18 PM
Last modification on : Monday, May 10, 2021 - 3:36:01 PM

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H. Bouayad, Z. Wang, Nicolas Dupre, R. Dedryvere, D. Foix, et al.. Improvement of Electrode/Electrolyte Interfaces in High-Voltage Spinel Lithium-Ion Batteries by Using Glutaric Anhydride as Electrolyte Additive. Journal of Physical Chemistry C, American Chemical Society, 2014, 118 (9), pp.4634. ⟨10.1021/jp5001573⟩. ⟨hal-00989014⟩

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