Identifying different states of lithiation of Li 4 Ti 5 O 12 spinel by energy-dispersive inelastic X-ray scattering (EDIXS) spectroscopy

ROBLEDO, JOSÉ IGNACIO; LEANI, JUAN JOSÉ; CHAUQUE, SUSANA; CÁMARA, OSVALDO; SÁNCHEZ, HÉCTOR JORGE; OLIVA, FABIANA YOLANDA

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY

ROYAL SOC CHEMISTRY

Año: 2020

0267-9477

he Li4Ti5O12 (LTO) compound has been investigated as an alternative negative electrode material for lithium ion batteries (LIBs), which are being used as energy storage devices in stationary systems as well as for electric vehicles due to their many interesting features. The LTO compound has shown remarkable Li-ion intercalation/de-intercalation reversibility, demonstrating also zero-strain volume change during the cycling process along with notable safety performance. Furthermore, LTO has a high voltage plateau in comparison with other negative material candidates, helping to avoid the deposition of metallic lithium in the dendrite form. Due to its performance and potential application in LIBs, a deep knowledge regarding the behavior of this LTO compound is of high interest. In this work, energy-dispersive resonant inelastic X-ray scattering (EDIXS) is used to fulfill this need. In addition, XANES measurements were carried out as complementary methodology. The results indicate that E