Hollow-core optical fibre sensors for operando Raman spectroscopy investigation of Li-ion battery liquid electrolytes

Miele, Ermanno; Dose, Wesley M.; Manyakin, Ilya; Frosz, Michael H.; Ruff, Zachary; De Volder, Michael F. L.; Grey, Clare P.; Baumberg, Jeremy J.; Euser, Tijmen G.

doi:10.1038/s41467-022-29330-4

Title: Hollow-core optical fibre sensors for operando Raman spectroscopy investigation of Li-ion battery liquid electrolytes

Journal Article · 28 March 2022 · Nature Communications

DOI: https://doi.org/10.1038/s41467-022-29330-4 · OSTI ID:1982105

Miele, Ermanno ^[1]; Dose, Wesley M. ^[1]; Manyakin, Ilya ^[2];

^[3]; Ruff, Zachary ^[4];

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^[4];

^[1];

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Univ. of Cambridge (United Kingdom). Cavendish Lab.; Harwell Science and Innovation Campus, Didcot (United Kingdom). The Faraday Institution
Univ. of Cambridge (United Kingdom). Cavendish Lab.
Max Planck Institute for the Science of Light, Erlangen (Germany)
Univ. of Cambridge (United Kingdom); Harwell Science and Innovation Campus, Didcot (United Kingdom). The Faraday Institution
Harwell Science and Innovation Campus, Didcot (United Kingdom). The Faraday Institution; Univ. of Cambridge (United Kingdom)

Improved analytical tools are urgently required to identify degradation and failure mechanisms in Li-ion batteries. However, understanding and ultimately avoiding these detrimental mechanisms requires continuous tracking of complex electrochemical processes in different battery components. Here, we report an operando spectroscopy method that enables monitoring the chemistry of a carbonate-based liquid electrolyte during electrochemical cycling in Li-ion batteries with a graphite anode and a LiNi_0.8Mn_0.1Co_0.1O₂ cathode. By embedding a hollow-core optical fibre probe inside a lab-scale pouch cell, we demonstrate the effective evolution of the liquid electrolyte species by background-free Raman spectroscopy. The analysis of the spectroscopy measurements reveals changes in the ratio of carbonate solvents and electrolyte additives as a function of the cell voltage and show the potential to track the lithium-ion solvation dynamics. The proposed operando methodology contributes to understanding better the current Li-ion battery limitations and paves the way for studies of the degradation mechanisms in different electrochemical energy storage systems.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States). Cell Analysis, Modeling and Prototyping (CAMP) Facility

Sponsoring Organization:: USDOE; Faraday Institution

Grant/Contract Number:: AC02-06CH11357; FIRG001

OSTI ID:: 1982105

Journal Information:: Nature Communications, Vol. 13, Issue 1; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Hollow-core optical fibre sensors for operando Raman spectroscopy investigation of Li-ion battery liquid electrolytes

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