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

Degradation Mechanisms of High Capacity 18650 Cells Containing Si-Graphite Anode and Nickel-Rich NMC Cathode

Journal Article · · Electrochimica Acta
 [1];  [1];  [1];  [2];  [1];  [2];  [1];  [3];  [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  2. Tsinghua Univ., Beijing (China)
  3. Colorado School of Mines, Golden, CO (United States)

Application of advanced anode and cathode materials in commercial lithium-ion batteries is attracting attention due to their high capacity. Silicon (Si)/graphite anodes and nickel (Ni)-rich lithium nickel manganese cobalt oxide with layered structures have been paired in commercial 18650 high energy density cells (~270 Wh/kg). It is crucial to investigate the cell performance and the aging behavior of this commercial cell. In this study, we present commercial cell degradation mechanisms by comparing fresh and aged electrodes, including changes of crystal structure, morphology, elemental composition, and electrochemical properties. The quantitative analysis was done based on dV/dQ incremental capacity analysis of 18650 cells. To determine the amount of cyclable lithium ions (Li+) and active material loss, the lithiation and delithiation capacity were compared for fresh and aged electrodes in half coin cells. Results showed that even with 5% (by mass) of Si added in the anode, cracks occurred across the anode leading to contact loss and thickening of the solid electrolyte interphase (SEI) layer. Additionally, the average fluorine (F) ratio of the aged anodes was higher compared to that of the fresh anodes. More severely, the F content on the Si aggregations on aged anodes increased to as high as 5 times that of the fresh anode, indicating SEI growth, especially on Si particles. Solid 7Li nuclear magnetic resonance results showed no detectable Li metal deposition on the aged anode. On the cathode side, cracks on the primary particle interfaces contributed to cathode material loss, contact loss, and impedance rise. Furthermore, Li+ loss into the thickened SEI layer, particle cracking, and impedance rise are the main reasons behind cell degradation.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1491439
Alternate ID(s):
OSTI ID: 1635855
Report Number(s):
NREL/JA--5400-72418
Journal Information:
Electrochimica Acta, Journal Name: Electrochimica Acta Journal Issue: C Vol. 297; ISSN 0013-4686
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (41)

Mechanism of Silicon Electrode Aging upon Cycling in Full Lithium-Ion Batteries journal February 2016
Cyclability study of silicon–carbon composite anodes for lithium-ion batteries using electrochemical impedance spectroscopy journal April 2011
Investigation of layered LiNi1/3Co1/3Mn1/3O2 cathode of lithium ion battery by electrochemical impedance spectroscopy journal November 2012
Impedance spectra of porous, composite intercalation electrodes: The origin of the low-frequency semicircles journal August 2005
Using probability density function to evaluate the state of health of lithium-ion batteries journal June 2013
Degradation of lithium ion batteries employing graphite negatives and nickel–cobalt–manganese oxide + spinel manganese oxide positives: Part 1, aging mechanisms and life estimation journal December 2014
4D analysis of the microstructural evolution of Si-based electrodes during lithiation: Time-lapse X-ray imaging and digital volume correlation journal July 2016
Degradation diagnostics for lithium ion cells journal February 2017
Microstructural degradation of silicon electrodes during lithiation observed via operando X-ray tomographic imaging journal February 2017
Degradation diagnosis of lithium-ion batteries with a LiNi0.5Co0.2Mn0.3O2 and LiMn2O4 blended cathode using dV/dQ curve analysis journal June 2018
Chemomechanical interplay of layered cathode materials undergoing fast charging in lithium batteries journal November 2018
Electrochemical Characteristics of Layered Transition Metal Oxide Cathode Materials for Lithium Ion Batteries: Surface, Bulk Behavior, and Thermal Properties journal December 2017
Origin of Structural Degradation During Cycling and Low Thermal Stability of Ni-Rich Layered Transition Metal-Based Electrode Materials journal October 2017
Facile Synthesis of Lithium Sulfide Nanocrystals for Use in Advanced Rechargeable Batteries journal December 2015
Study of Lithium Silicide Nanoparticles as Anode Materials for Advanced Lithium Ion Batteries journal May 2017
Systematic Investigation of the Alucone-Coating Enhancement on Silicon Anodes journal November 2017
An Outlook on Lithium Ion Battery Technology journal September 2017
Rechargeable Lithium–Sulfur Batteries journal July 2014
Lithium Silicide Nanocrystals: Synthesis, Chemical Stability, Thermal Stability, and Carbon Encapsulation journal September 2014
7 Li Solid-State Nuclear Magnetic Resonance as a Probe of Lithium Species in Microporous Carbon Anodes journal May 2003
Impedance of a Single Intercalation Particle and of Non-Homogeneous, Multilayered Porous Composite Electrodes for Li-ion Batteries journal August 2004
Impedance Spectra of Nonhomogeneous, Multilayered Porous Composite Graphite Electrodes for Li-Ion Batteries: Experimental and Theoretical Studies journal April 2011
Understanding Lithium Inventory Loss and Sudden Performance Fade in Cylindrical Cells during Cycling with Deep-Discharge Steps journal December 2014
Effect of Fluoroethylene Carbonate (FEC) on the Performance and Surface Chemistry of Si-Nanowire Li-Ion Battery Anodes journal December 2011
Electrochemical Evaluation and Phase-related Impedance Studies on Silicon–Few Layer Graphene (FLG) Composite Electrode Systems journal January 2018
Intrinsic Origins of Crack Generation in Ni-rich LiNi0.8Co0.1Mn0.1O2 Layered Oxide Cathode Material journal January 2017
A high tap density secondary silicon particle anode fabricated by scalable mechanical pressing for lithium-ion batteries journal January 2015
A review of Ni-based layered oxides for rechargeable Li-ion batteries journal January 2017
Understanding local degradation of cycled Ni-rich cathode materials at high operating temperature for Li-ion batteries journal September 2014
Determination of the mechanism and extent of surface degradation in Ni-based cathode materials after repeated electrochemical cycling journal September 2016
Spatial atomic layer deposition for coating flexible porous Li-ion battery electrodes
  • Yersak, Alexander S.; Sharma, Kashish; Wallas, Jasmine M.
  • Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 36, Issue 1 https://doi.org/10.1116/1.5006670
journal January 2018
Highly elastic binders integrating polyrotaxanes for silicon microparticle anodes in lithium ion batteries journal July 2017
Layered Oxide, Graphite and Silicon-Graphite Electrodes for Lithium-Ion Cells: Effect of Electrolyte Composition and Cycling Windows journal October 2016
The Development and Future of Lithium Ion Batteries journal December 2016
Electrode Behavior RE-Visited: Monitoring Potential Windows, Capacity Loss, and Impedance Changes in Li 1.03 (Ni 0.5 Co 0.2 Mn 0.3 ) 0.97 O 2 /Silicon-Graphite Full Cells journal January 2016
Irreversible Capacity Loss of Li-Ion Batteries Cycled at Low Temperature Due to an Untypical Layer Hindering Li Diffusion into Graphite Electrode journal January 2017
Effects of Biphenyl Polymerization on Lithium Deposition in Commercial Graphite/NMC Lithium-Ion Pouch-Cells during Calendar Aging at High Temperature journal January 2017
Performance of Full Cells Containing Carbonate-Based LiFSI Electrolytes and Silicon-Graphite Negative Electrodes journal December 2015
Analysis of Li-Ion Battery Electrochemical Impedance Spectroscopy Data: An Easy-to-Implement Approach for Physics-Based Parameter Estimation Using an Open-Source Tool journal January 2018
Depth-Dependent Redox Behavior of LiNi 0.6 Mn 0.2 Co 0.2 O 2 journal January 2018
Differentiating the Degradation Phenomena in Silicon-Graphite Electrodes for Lithium-Ion Batteries journal January 2017

Cited By (3)


Similar Records

Beneficial Effect of Li5FeO4 Lithium Source for Li-Ion Batteries with a Layered NMC Cathode and Si Anode
Journal Article · Tue Dec 22 23:00:00 EST 2020 · Journal of the Electrochemical Society (Online) · OSTI ID:1782722