Concurrent operando neutron imaging and diffraction maps lithiation phases, solid electrolyte interphase, and dead lithium across a 400 micrometer graphite electrode during one charge-discharge cycle.
A multimodal operando neutron study of the phase evolution in a graphite electrode
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abstract
Obtaining a complete picture of local processes still poses a significant challenge in battery research. Here we demonstrate an in-situ combination of multimodal neutron imaging with neutron diffraction for spatially resolved operando observations of the lithiation-delithiation of a graphite electrode in a Li-ion battery cell. Throughout the lithiation-delithiation process we image the Li distribution based on the local beam attenuation. Simultaneously, we observe the development of the lithiated graphite phases as a function of cycling time and electrode thickness and integral throughout its volume by diffraction contrast imaging and diffraction, respectively. While the conventional imaging data allows to observe the Li uptake in graphite already during the formation of the solid electrolyte interphase, diffraction indicates the onset and development of the Li insertion/extraction globally, which supports the local structural transformation observations by diffraction contrast imaging.
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cond-mat.mtrl-sci 1years
2024 1verdicts
CONDITIONAL 1representative citing papers
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Concurrent operando neutron imaging and diffraction analysis revealing spatial lithiation phase evolution in an ultra-thick graphite electrode
Concurrent operando neutron imaging and diffraction maps lithiation phases, solid electrolyte interphase, and dead lithium across a 400 micrometer graphite electrode during one charge-discharge cycle.