Garnet solid electrolyte blended LiNi0.6Mn0.2Co0.2O2 as high-voltage stable cathodes for advanced lithium-ion batteries

Yu, Chan-Yeop; Jiao, Xinwei; Rao, Lalith; Son, Seoung-Bum; Lee, Eungje; Kim, Jung-Hyun

doi:10.1016/j.elecom.2022.107286

Garnet solid electrolyte blended LiNi_0.6Mn_0.2Co_0.2O₂ as high-voltage stable cathodes for advanced lithium-ion batteries

Journal Article · Thu May 05 00:00:00 EDT 2022 · Electrochemistry Communications

DOI:https://doi.org/10.1016/j.elecom.2022.107286· OSTI ID:1924433

Yu, Chan-Yeop ^[1]; Jiao, Xinwei ^[1]; Rao, Lalith ^[1]; Son, Seoung-Bum ^[2]; Lee, Eungje ^[2]; Kim, Jung-Hyun ^[1]

The Ohio State Univ., Columbus, OH (United States)
Argonne National Lab. (ANL), Lemont, IL (United States)

Ni-rich LiNi_1-xCo_x/2Mn_x/2O₂ layered materials have been widely adopted as cathodes for current electric vehicles (EVs) due to their high gravimetric and volumetric energy densities. However, their high-voltage instability (e.g., > 4.3 V_vsLi) limited their usable capacities corresponding to about 60 – 70 % of theoretical capacities. The major problems of high-voltage operation stem from instability of Ni^3+/4+ at cathode-electrolyte interphase (CEI) in contact with electrolytes. Here we propose garnet-type Li_6.7La₃Zr_1.7Ta_0.3O₁₂ (LLZT) solid-electrolyte-blended LiNi_0.6Mn_0.2Co_0.2O₂ (NMC) as high-voltage stable cathodes. The LLZT not only passivates the CEI but scavenges protons and moisture in electrolytes. From well-balanced ionic and electronic transport properties, 5 wt% LLZT blended NMC cathodes delivered enhanced electrochemical performances in full-cells. Unlike other complicated coating processes, our proposed solid-electrolyte blending approach can be readily implementable in commercial Li-ion batteries due to its manufacturing friendliness, energy saving, and cost effectiveness.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (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; SC0020809

OSTI ID:: 1924433

Journal Information:: Electrochemistry Communications, Journal Name: Electrochemistry Communications Vol. 138; ISSN 1388-2481

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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33 ADVANCED PROPULSION SYSTEMS
36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Li-ion batteries
Ni-rich NMC
blended cathode
garnet solid electrolyte
high-voltage cathodes

Garnet solid electrolyte blended LiNi0.6Mn0.2Co0.2O2 as high-voltage stable cathodes for advanced lithium-ion batteries

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Garnet solid electrolyte blended LiNi_0.6Mn_0.2Co_0.2O₂ as high-voltage stable cathodes for advanced lithium-ion batteries