Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Influence of metallic contaminants on the electrochemical and thermal behavior of Li-ion electrodes

Journal Article · · Journal of Power Sources

Emerging nondestructive (direct) recycling techniques for lithium-ion batteries may introduce metallic impurities into recycled electrodes. In the present work, the impact of such nonionic contaminants on the practical performance of both anode and cathode materials is evaluated using a synergistic combination of electrochemical and thermal analysis. The impurities under study have been selected through evaluation of industrially shredded batteries, and include Fe0, Al0, Mg0, Cu0, and Si0. The electrochemical behavior of materials containing each individual contaminant at either the anode or the cathode is evaluated in both half-cell and full-cell format. Further, the first-cycle thermal signatures of full cells are used to validate and complement electrochemical signatures, and the two techniques are used in conjunction to suggest distinct mechanisms of electrochemical reactivity for the various impurities. At the anode, metallic contaminants are found to disrupt performance through direct reaction with Li and may serve as weak catalysts to accelerate electrolyte degradation. At the cathode, metallic contaminants show evidence of crossover during formation cycling to disrupt SEI formation. We suggest that coupled electrochemical and thermal analysis may be used to both identify the presence of contaminants and to elucidate specific mechanisms of reactivity for metallic impurities under anodic and cathodic conditions.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE) - Office of Vehicle Technologies (VTO) - Battery Materials Research (BMR) Program
DOE Contract Number:
AC02-06CH11357
OSTI ID:
1908118
Journal Information:
Journal of Power Sources, Vol. 518
Country of Publication:
United States
Language:
English

References (26)

Recycling End-of-Life Electric Vehicle Lithium-Ion Batteries journal November 2019
Impurity removal with highly selective and efficient methods and the recycling of transition metals from spent lithium-ion batteries journal January 2019
Regeneration and reutilization of cathode materials from spent lithium-ion batteries journal March 2020
Recycling of mixed cathode lithium‐ion batteries for electric vehicles: Current status and future outlook journal March 2020
Synthesis, electrochemical investigation and structural analysis of doped Li[Ni0.6Mn0.2Co0.2-M]O2 (x = 0, 0.05; M = Al, Fe, Sn) cathode materials journal May 2018
Understanding fundamental effects of Cu impurity in different forms for recovered LiNi0.6Co0.2Mn0.2O2 cathode materials journal December 2020
Copper Impurity Effects on LiNi 1/3 Mn 1/3 Co 1/3 O 2 Cathode Material journal September 2015
The effect of Fe as an impurity element for sustainable resynthesis of Li[Ni1/3Co1/3Mn1/3]O2 cathode material from spent lithium-ion batteries journal February 2019
Advanced electrochemical performance of Li[Ni(1/3−x)FexCo1/3Mn1/3]O2 as cathode materials for lithium-ion battery journal April 2008
Systematic Study of Al Impurity for NCM622 Cathode Materials journal June 2020
Effect of impurities caused by a recycling process on the electrochemical performance of Li[Ni0.33Co0.33Mn0.33]O2 journal July 2014
Synthesis and performance of Li[(Ni1/3Co1/3Mn1/3)1−xMgx]O2 prepared from spent lithium ion batteries journal February 2013
A Correlative and Multi-Modal Approach to Analyzing Microscopic Particulate Contaminants in Carbon Black journal August 2019
Effect of electrode manufacturing defects on electrochemical performance of lithium-ion batteries: Cognizance of the battery failure sources journal April 2016
Dissolution, migration, and deposition of transition metal ions in Li-ion batteries exemplified by Mn-based cathodes – a critical review journal January 2018
Measurement of Parasitic Reactions in Li Ion Cells by Electrochemical Calorimetry journal January 2012
Lithiation of Magnetite (Fe 3 O 4 ): Analysis Using Isothermal Microcalorimetry and Operando X-ray Absorption Spectroscopy journal April 2018
Insights into Reactivity of Silicon Negative Electrodes: Analysis Using Isothermal Microcalorimetry journal September 2019
Elucidating the evolution of silicon anodes in lithium based batteries journal September 2020
Degradation diagnosis of lithium-ion batteries with a LiNi0.5Co0.2Mn0.3O2 and LiMn2O4 blended cathode using dV/dQ curve analysis journal June 2018
Degradation mechanisms of high capacity 18650 cells containing Si-graphite anode and nickel-rich NMC cathode journal February 2019
Beyond Intercalation-Based Li-Ion Batteries: The State of the Art and Challenges of Electrode Materials Reacting Through Conversion Reactions journal August 2010
The Solid-Electrolyte Interphase Formation Reactions of Ethylene Sulfate and Its Synergistic Chemistry with Prop-1-ene-1,3-Sultone in Lithium-Ion Cells journal January 2017
A Quantitative Scale of Oxophilicity and Thiophilicity journal August 2016
Understanding electrochemical potentials of cathode materials in rechargeable batteries journal March 2016
Passivation of aluminum current collectors in non-aqueous carbonate solutions containing sodium or potassium hexafluorophosphate salts journal January 2019