Fig. 7: Long Cycling of a LTO/SuperP| LP30 |Li metal cell. | Nature Communications

Fig. 7: Long Cycling of a LTO/SuperP| LP30 |Li metal cell.

From: Tracking solid electrolyte interphase dynamics using operando fibre-optic infra-red spectroscopy and multivariate curve regression

Fig. 7

a 1 M LiPF6 in EC:DMC (1:1 v/v) electrolyte IR-FEWS reference spectrum. b Voltage profile during galvanostatic cycling, resting OCV time is highlighted in yellow. c A(t)−A(t0) absorbance variations spectra during cycling. The range where only Li2CO3 and semi-carbonates absorb is highlighted with red and purple rectangles, respectively. d Detailed A(t)−A(t0) absorbance variations for two selected wavenumbers representative of Li2CO3 (1525 cm−1, red), and lithium semi-carbonates (1640 cm−1, purple). e SEI spectra components resulting from MCR-ALS decomposition of the operando data, shifted along the vertical axis for readability. The IR bands of LEDC34,35 and LMC4 are shown below the plot for comparison. f Associated time-dependent contributions. This decomposition is associated to MSEoperando = 1.35e-02 and MSEcalib = 3.88e-04.

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