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Tailoring of Gradient Particles of Li-Rich Layered Cathodes with Mitigated Voltage Decay for Lithium-Ion Batteries

Ju, Xiaokang ; Hou, Xu LU orcid ; Beuse, Thomas ; Liu, Zhongqing ; Du, Leilei ; Brinkmann, Jan-Paul ; Paillard, Elie ; Wang, Taihong ; Winter, Martin and Li, Jie (2020) In ACS Applied Materials and Interfaces 12(39). p.43596-43604
Abstract

Voltage decay during cycling is still a major issue for Li-rich cathodes in lithium ion batteries. Recently, the increase of Ni content has been recognized as an effective way to mitigate this problem, although it leads to lower-capacity materials. To find a balance between voltage decay and high capacity, particles of Li-rich materials with concentration gradients of transition metals have been prepared. Since voltage decay is caused by oxygen loss and phase transition that occur mainly on the particle surface, the Ni content is designed with a negative gradient of concentration from the surface to the bulk of particles. To do so, microsized Li1.20Ni0.13Co0.13Mn0.54O2 particles are mixed with much smaller LiNi0.8Co0.1Mn0.1O2 particles... (More)

Voltage decay during cycling is still a major issue for Li-rich cathodes in lithium ion batteries. Recently, the increase of Ni content has been recognized as an effective way to mitigate this problem, although it leads to lower-capacity materials. To find a balance between voltage decay and high capacity, particles of Li-rich materials with concentration gradients of transition metals have been prepared. Since voltage decay is caused by oxygen loss and phase transition that occur mainly on the particle surface, the Ni content is designed with a negative gradient of concentration from the surface to the bulk of particles. To do so, microsized Li1.20Ni0.13Co0.13Mn0.54O2 particles are mixed with much smaller LiNi0.8Co0.1Mn0.1O2 particles to form deposits of small particles onto larger particles. The concentration gradient of Ni is achieved as the Ni ions in LiNi0.8Co0.1Mn0.1O2 penetrate into Li1.20Ni0.13Co0.13Mn0.54O2 during a calcination post-treatment. Gradient samples show superior cycling performance and voltage retention as well as improved safety. This systematic study explores a material model combining Li-rich and high-Ni layered cathodes that is shown to be effective in creating a balance between mitigated voltage decay and high energy density.

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author
; ; ; ; ; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
keywords
gradient particles, ion exchange, Li-rich layered cathode, mitigated voltage decay
in
ACS Applied Materials and Interfaces
volume
12
issue
39
pages
9 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • pmid:32840344
  • scopus:85092681593
ISSN
1944-8244
DOI
10.1021/acsami.0c10410
language
English
LU publication?
no
additional info
Publisher Copyright: Copyright © 2020 American Chemical Society.
id
baf24af5-065c-44da-aea1-d46e8f8cc48d
date added to LUP
2025-12-05 22:37:26
date last changed
2025-12-12 03:52:31
@article{baf24af5-065c-44da-aea1-d46e8f8cc48d,
  abstract     = {{<p>Voltage decay during cycling is still a major issue for Li-rich cathodes in lithium ion batteries. Recently, the increase of Ni content has been recognized as an effective way to mitigate this problem, although it leads to lower-capacity materials. To find a balance between voltage decay and high capacity, particles of Li-rich materials with concentration gradients of transition metals have been prepared. Since voltage decay is caused by oxygen loss and phase transition that occur mainly on the particle surface, the Ni content is designed with a negative gradient of concentration from the surface to the bulk of particles. To do so, microsized Li1.20Ni0.13Co0.13Mn0.54O2 particles are mixed with much smaller LiNi0.8Co0.1Mn0.1O2 particles to form deposits of small particles onto larger particles. The concentration gradient of Ni is achieved as the Ni ions in LiNi0.8Co0.1Mn0.1O2 penetrate into Li1.20Ni0.13Co0.13Mn0.54O2 during a calcination post-treatment. Gradient samples show superior cycling performance and voltage retention as well as improved safety. This systematic study explores a material model combining Li-rich and high-Ni layered cathodes that is shown to be effective in creating a balance between mitigated voltage decay and high energy density.</p>}},
  author       = {{Ju, Xiaokang and Hou, Xu and Beuse, Thomas and Liu, Zhongqing and Du, Leilei and Brinkmann, Jan-Paul and Paillard, Elie and Wang, Taihong and Winter, Martin and Li, Jie}},
  issn         = {{1944-8244}},
  keywords     = {{gradient particles; ion exchange; Li-rich layered cathode; mitigated voltage decay}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{39}},
  pages        = {{43596--43604}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{ACS Applied Materials and Interfaces}},
  title        = {{Tailoring of Gradient Particles of Li-Rich Layered Cathodes with Mitigated Voltage Decay for Lithium-Ion Batteries}},
  url          = {{http://dx.doi.org/10.1021/acsami.0c10410}},
  doi          = {{10.1021/acsami.0c10410}},
  volume       = {{12}},
  year         = {{2020}},
}