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12 October 2021 Observing degradation at electrode-electrolyte interfaces in Li-ion batteries
Robert Weatherup
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Proceedings Volume 11883, Photoemission Spectroscopy for Materials Analysis; 1188306 (2021) https://doi.org/10.1117/12.2604797
Event: SPIE Vacuum Technologies, 2021, Glasgow, United Kingdom
Abstract
Lithium-ion batteries (LIBs) are key to the transition from fossil fuels towards increased use of renewable energy sources, but their cycle-life is limited by degradation processes. We report here detailed ex-situ studies of the interfacial degradation in Ni-rich LiNixMnyCozO2 (NMC) cathode materials cycled vs. graphite. We connect electrochemical signatures of cell degradation with interfacial characterisation with Hard X-ray Photoelectron Spectroscopy (HaXPES), to reveal chemical signatures of different degradation regimes. We then introduce several complementary approaches to performing operando x-ray photoelectron and absorption spectroscopy (XPS/XAS), demonstrating how these can resolve solid-electrolyte interphase (SEI) formation on Li-ion battery anodes.
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Robert Weatherup "Observing degradation at electrode-electrolyte interfaces in Li-ion batteries", Proc. SPIE 11883, Photoemission Spectroscopy for Materials Analysis, 1188306 (12 October 2021); https://doi.org/10.1117/12.2604797
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KEYWORDS
Interfaces
Electrodes
Laser induced breakdown spectroscopy
Transition metals
Oxidation
Photoemission spectroscopy
Renewable energy
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