DataVXACS Applied Energy MaterialsPaper
journal article·2020-03-23Open access

Kinetic Limitations in Cycled Nickel-Rich NCM Cathodes and Their Effect on the Phase Transformation Behavior

Simon Schweidler, Lea de Biasi, Pascal Hartmann, Torsten Brezesinski, Jürgen Janek

ACS Applied Energy Materials· Volume 3· Issue 3
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Source abstract

Abstract

Layered lithium transition-metal oxides of the general formula Li1+x(Ni1–y–zCoyMnz)1–xO2 (NCM or NMC) represent a promising class of cathode active materials for Li-ion battery applications. However, especially Ni-rich NCMs, enabling high capacity and energy density, tend to undergo more severe degradation during cycling than low and medium Ni materials. In this work, the kinetics of phase transitions in cycle-aged Li1+x(Ni0.85Co0.1Mn0.05)1–xO2 (NCM851005) upon electrochemical (de)lithiation have been studied by operando X-ray diffraction. The focus is set on the onset of kinetic impairment, evident from the coexistence of differently delithiated phases for cell voltages greater than ∼4.1 V after ≥150 cycles, to examine if the behavior observed with NCM851005 is analogous to the H2–H3 transformation in isostructural LiNiO2.
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Research context

Energy storage

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced Battery Technologies Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Battery and Electrochemistry Laboratory, Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany

Institute for Applied Materials-Energy Storage Systems, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany

BASF SE, Carl-Bosch-Strasse 38, 67056 Ludwigshafen, Germany

Institute of Physical Chemistry & Center for Materials Science, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany

Funding

BASF

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