skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Enhanced mechanical strength and electrochemical performance of core–shell structured high–nickel cathode material

Abstract

Improving capacity retention during cycling and the thermal–abuse tolerance of layered high–nickel cathode material, LiNi0.8Mn0.1Co0.1O2 (NMC811), is a significant challenge. In this work, a series of core–shell structured cathode materials with the overall composition of LiNi0.8Mn0.1Co0.1O2 was prepared via a coprecipitation method in which the nickel–rich composition (LiNi0.9Mn0.05Co0.05O2) is the core and the manganese–rich composition (LiNi0.33Mn0.33Co0.33O2) is the shell. In terms of achieving a higher nickel content (more than 80%) of heterogeneous material, this core–shell structured material is a more practical approach because it has a larger nickel–rich core region and a thicker manganese–rich shell than the full–concentration gradient material, not to mention being more feasible for continuous mass production. Analysis of mechanical strength through nanoindentation shows that the core–shell structured NMC811 has higher stiffness and compressive stress–strain than the commercial homogeneous NMC811 and retains the mechanical strength and the binding force strong enough to prevent crack formation even after 200 cycles. The prepared core–shell structure NMC811 exhibits a greatly improved capacity retention of 76.6% compared to the commercial homogeneous NMC811 with a capacity retention of 39.6% after 200 cycles. This material also exhibits significantly improved thermal stability over the commercial homogeneous NMC811.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [2]
  1. Univ. of Wisconsin, Madison, WI (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Science (SC)
OSTI Identifier:
1606409
Alternate Identifier(s):
OSTI ID: 1592525
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 448; Journal Issue: C; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; cathode; core-shell; high-nickel; lithium-ion batteries; mechanical failure; stress-strain curve

Citation Formats

Maeng, Sangjin, Chung, Youngmin, Min, Sangkee, and Shin, Youngho. Enhanced mechanical strength and electrochemical performance of core–shell structured high–nickel cathode material. United States: N. p., 2019. Web. https://doi.org/10.1016/j.jpowsour.2019.227395.
Maeng, Sangjin, Chung, Youngmin, Min, Sangkee, & Shin, Youngho. Enhanced mechanical strength and electrochemical performance of core–shell structured high–nickel cathode material. United States. https://doi.org/10.1016/j.jpowsour.2019.227395
Maeng, Sangjin, Chung, Youngmin, Min, Sangkee, and Shin, Youngho. Fri . "Enhanced mechanical strength and electrochemical performance of core–shell structured high–nickel cathode material". United States. https://doi.org/10.1016/j.jpowsour.2019.227395. https://www.osti.gov/servlets/purl/1606409.
@article{osti_1606409,
title = {Enhanced mechanical strength and electrochemical performance of core–shell structured high–nickel cathode material},
author = {Maeng, Sangjin and Chung, Youngmin and Min, Sangkee and Shin, Youngho},
abstractNote = {Improving capacity retention during cycling and the thermal–abuse tolerance of layered high–nickel cathode material, LiNi0.8Mn0.1Co0.1O2 (NMC811), is a significant challenge. In this work, a series of core–shell structured cathode materials with the overall composition of LiNi0.8Mn0.1Co0.1O2 was prepared via a coprecipitation method in which the nickel–rich composition (LiNi0.9Mn0.05Co0.05O2) is the core and the manganese–rich composition (LiNi0.33Mn0.33Co0.33O2) is the shell. In terms of achieving a higher nickel content (more than 80%) of heterogeneous material, this core–shell structured material is a more practical approach because it has a larger nickel–rich core region and a thicker manganese–rich shell than the full–concentration gradient material, not to mention being more feasible for continuous mass production. Analysis of mechanical strength through nanoindentation shows that the core–shell structured NMC811 has higher stiffness and compressive stress–strain than the commercial homogeneous NMC811 and retains the mechanical strength and the binding force strong enough to prevent crack formation even after 200 cycles. The prepared core–shell structure NMC811 exhibits a greatly improved capacity retention of 76.6% compared to the commercial homogeneous NMC811 with a capacity retention of 39.6% after 200 cycles. This material also exhibits significantly improved thermal stability over the commercial homogeneous NMC811.},
doi = {10.1016/j.jpowsour.2019.227395},
journal = {Journal of Power Sources},
number = C,
volume = 448,
place = {United States},
year = {2019},
month = {11}
}