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Mechanistic investigation of silicon-graphite/LiNi0.8Mn0.1Co0.1O2 commercial cells for non-intrusive diagnosis and prognosis

AuthorsAnseán, D.; Baure, G.; González, M.; Cameán Martínez, Ignacio CSIC ORCID ; García Suárez, Ana Beatriz CSIC ORCID ; Dubarry, M.
NMC 811
Incremental capacity
Mechanistic model simulations
Issue Date29-Mar-2020
CitationJournal of Power Sources 459: 227882 (2020)
AbstractDue to their high energy density, lithium-ion batteries with blended silicon-graphite (Si-Gr) anodes and nickel-rich (NMC) cathodes have been regarded as one of the most promising technologies for next-generation consumer electronics and electric vehicles. However, there are still several technical challenges to overcome for successful wide-spread adoption; in particular, deciphering the degradation phenomena remains complex and challenging, as the blended nature of the electrode creates a new paradigm, with the Si/Gr ratio likely changing with aging. Although ex-situ techniques have been used, a set of in-operando tools that enable diagnosis and prognosis on this technology has yet to be developed. Herein, we present a mechanistic investigation that generates a complete degradation mapping coupled with proposed aging features of interest, to attain accurate diagnosis and prognosis. The mechanistic model allows analyzing aging modes that display incubation periods as a potential prelude to thermodynamic plating, and the identification via incremental capacity of unique silicon features that change predictably as it degrades. A comprehensive look-up table summarizing key features is provided to provide support both to scientists and engineers on designing next-generation battery management systems for this technology.
Publisher version (URL)https://doi.org/10.1016/j.jpowsour.2020.227882
Appears in Collections:(INCAR) Artículos
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