Stabilized Electrode/Electrolyte Interphase by a Saturated Ionic Liquid Electrolyte for High-Voltage NMC532/Si-Graphite Cells

Liu, Qian; Jiang, Wei; Munoz, Maria Piernas; Liu, Yuzi; Yang, Zhenzhen; Bloom, Ira; Dzwiniel, Trevor L.; Li, Ying; Pupek, Krzysztof Z.; Zhang, Zhengcheng

doi:10.1021/acsami.0c06038

Title: Stabilized Electrode/Electrolyte Interphase by a Saturated Ionic Liquid Electrolyte for High-Voltage NMC532/Si-Graphite Cells

Journal Article · Mon Apr 27 00:00:00 EDT 2020 · ACS Applied Materials and Interfaces

DOI:https://doi.org/10.1021/acsami.0c06038· OSTI ID:1660419

Liu, Qian ^[1]; Jiang, Wei ^[1]; Munoz, Maria Piernas ^[1];

^[1]; Yang, Zhenzhen ^[1];

^[1]; Dzwiniel, Trevor L. ^[1];

^[1]; Pupek, Krzysztof Z. ^[1];

^[1]

Argonne National Lab. (ANL), Argonne, IL (United States)

Nonaqueous electrolyte has become one of the technical barriers in enabling Li-ion battery comprising of a high voltage cathode and high capacity anode. Here, we demonstrate a saturated piperidinum bis(fluorosulfonyl)imide ionic liquid (IL) with a LiFSI salt not only supports the redox reaction on the cathode at high voltages, but also shows exceptional kinetic stability on the lithiated anode as evidenced by its improved cycling performance in a NMC532/Si-graphite full cells cycled between 4.6 and 3.0 V. On the basis of the spectroscopic/microscopic analysis and molecular dynamics (MD) simulations, the superior performance of the cells is attributed to the formation of solid-electrolyte-interphase on both electrode as well as unique solvation structure where a deadlocked coordination network is established at the saturated state, which prevents transition metal dissolution into the electrolyte via a solvation process.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1660419

Journal Information:: ACS Applied Materials and Interfaces, Vol. 12, Issue 20; ISSN 1944-8244

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 19 works

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Title: Stabilized Electrode/Electrolyte Interphase by a Saturated Ionic Liquid Electrolyte for High-Voltage NMC532/Si-Graphite Cells

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