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Physical Theory of Voltage Fade in Lithium- and Manganese-Rich Transition Metal Oxides

Journal Article · · Journal of the Electrochemical Society
DOI:https://doi.org/10.1149/2.0181506jes· OSTI ID:1339136

Lithium- and manganese-rich (LMR) transition metal oxide cathodes are of interest for lithium-ion battery applications due to their increased energy density and decreased cost. However, the advantages in energy density and cost are offset, in part, due to the phenomena of voltage fade. Specifically, the voltage profiles (voltage as a function of capacity) of LMR cathodes transform from a high energy configuration to a lower energy configuration as they are repeatedly charged (Li removed) and discharged (Li inserted). Here, we propose a physical model of voltage fade that accounts for the emergence of a low voltage Li phase due to the introduction of transition metal ion defects within a parent Li phase. The phenomenological model was re-cast in a general form and experimental LMR charge profiles were de-convoluted to extract the evolutionary behavior of various components of LMR capacitance profiles. Evolution of the voltage fade component was found to follow a universal growth curve with a maximal voltage fade capacity of ≈ 20% of the initial total capacity.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1339136
Journal Information:
Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 6 Vol. 162; ISSN 0013-4651
Publisher:
The Electrochemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

Fundamental interplay between anionic/cationic redox governing the kinetics and thermodynamics of lithium-rich cathodes journal December 2017
Fundamental understanding and practical challenges of anionic redox activity in Li-ion batteries journal April 2018
Manganese oxidation as the origin of the anomalous capacity of Mn-containing Li-excess cathode materials journal July 2019
Voltage decay and redox asymmetry mitigation by reversible cation migration in lithium-rich layered oxide electrodes journal January 2020
Enhanced electrochemical performance of Li-rich cathode materials through microstructural control journal January 2018

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