<i>In situ</i> Raman and UV-Vis spectroscopic analysis of lithium-ion batteries

Heber, Marcel; Schilling, Christian; Groß, Toni André; Heß, Christian

doi:10.1557/opl.2015.634

Cited by 5 publications

(1 citation statement)

References 25 publications

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“…Consequently, both Raman bands of LCO weaken in intensity as the Li 0.75 CoO 2 phase grows. Although many reports evidence a drastic vanishing of the bands within the 0.95 > x > 0.75 region (Itoh et al, 2000;Kuwata et al, 2012), several studies present spectra in which the band intensities survive past 0.75 > x and display weakened, broader and red shifted bands (Figure 5A, middle) (Heber et al, 2015;Otoyama et al, 2016a;Snyder et al, 2016;Park et al, 2017). Peak asymmetries (Figure 5A, top) possibly reveal the presence of the second phase Li 0.75 CoO 2 with a larger c-lattice parameter (Inaba et al, 1997;Nishi et al, 2013).…”

Section: Licoo 2 (Lco)mentioning

confidence: 98%

In situ and Operando Raman Spectroscopy of Layered Transition Metal Oxides for Li-ion Battery Cathodes

2018

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In situ and operando Raman spectroscopy is proposed to provide unique means for deeper fundamental understanding and further development of layered transition metal LiMO 2 (M = Ni, Co, Mn) oxides suitable for Li-ion battery applications. We compare several spectro-electrochemical cell designs and suggest key experimental parameters for obtaining optimum electrochemical performance and spectral quality. Studies of the most practically relevant LiMO 2 compositions are exemplified with particular focus on two experimental approaches: (1) lateral and axial Raman mapping of the electrode's (near-) surface to monitor inhomogeneous electrode reactions and (2) time-dependent singleparticle spectra during cycling to analyze the Li x MO 2 lattice dynamics as a function of lithium content. Raman Spectroscopy is claimed to provide a unique real-time probe of the M-O bonds, which are at the heart of the electrochemistry of LiMO 2 oxides and govern their stability. We highlight the need for further fundamental understanding of the relationships between the spectroscopic response and oxide lattice structure with particular emphasis on the development of a theoretical framework linking the position and intensity of the Raman bands to the local Li x MO 2 lattice configuration. The use of complementary experimental techniques and model systems for validation also deserve further attention. Several novel LiMO 2 compositions are currently being explored, especially containing dopings and coatings, and Raman spectroscopy could offer a highly dynamic and convenient tool to guide the formulation of high specific charge and long cycle life LiMO 2 oxides for next-generation Li-ion battery cathodes.

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Section: Licoo 2 (Lco)mentioning

confidence: 98%

In situ and Operando Raman Spectroscopy of Layered Transition Metal Oxides for Li-ion Battery Cathodes

2018

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Ni/Li antisite induced disordered passivation layer for high-Ni layered oxide cathode material

Jamil

Fasehullah

et al. 2022

Energy Storage Materials

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Thermal evolution of LiCoO2 structure and Raman spectra below 400 °C

Ryabin,

Krylov,

Krylova

et al. 2023

The Journal of Chemical Physics

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Lithium cobalt oxide is a convenient model material for the vast family of cathode materials with a layered structure and still retains some commercial perspectives for microbatteries and some other applications. In this work, we have used ab initio calculations, x-ray diffraction, Raman spectroscopy, and a theoretical physical model, based on quasi-harmonic approximation with anharmonic contributions of the three-phonon and four-phonon processes, to study a temperature-induced change of Raman spectra for LiCoO2. The obtained values of shift and broadening for Eg and A1g bands can be used for quantitative characterization of temperature change, for example, due to laser-induced heating during Raman spectra measurements. The theoretical analysis of the experimental results lets us conclude that Raman spectra changes for LiCoO2 can be explained by the combination of thermal expansion of the crystal lattice and phonon damping by anharmonic coupling with comparable contributions of the three-phonon and four-phonon processes. The obtained results can be further used to develop Raman-based quality control tools.

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In situ Raman and UV-Vis spectroscopic analysis of lithium-ion batteries

Cited by 5 publications

References 25 publications

In situ and Operando Raman Spectroscopy of Layered Transition Metal Oxides for Li-ion Battery Cathodes

In situ and Operando Raman Spectroscopy of Layered Transition Metal Oxides for Li-ion Battery Cathodes

Ni/Li antisite induced disordered passivation layer for high-Ni layered oxide cathode material

Thermal evolution of LiCoO2 structure and Raman spectra below 400 °C

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