Effects of surface modification on the cycling stability of LiNi 0.8Co0.2O2 electrodes by CeO2 coating

Hyung Wook Ha, Kyung Hee Jeong, Nan Ji Yun, Ming Zi Hong, Keon Kim

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

A high-performance LiNi0.8Co0.2O2 cathode was successfully fabricated by a sol-gel coating of CeO2 to the surface of the LiNi0.8Co0.2O2 powder and subsequent heat treatment at 700 °C for 5 h. The surface-modified and pristine LiNi0.8Co0.2O2 powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), slow rate cyclic voltammogram (CV), and differential scanning calorimetry (DSC). Unlike pristine LiNi0.8Co0.2O2, the CeO 2-coated LiNi0.8Co0.2O2 cathode exhibits no decrease in its original specific capacity of 182 mAh/g (versus lithium metal) and excellent capacity retention (95% of its initial capacity) between 4.5 and 2.8 V after 55 cycles. The results indicate that the surface treatment should be an effective way to improve the comprehensive properties of the cathode materials for lithium ion batteries.

Original languageEnglish
Pages (from-to)3764-3769
Number of pages6
JournalElectrochimica Acta
Volume50
Issue number18
DOIs
Publication statusPublished - 2005 Jun 10

Fingerprint

Surface treatment
Cathodes
Coatings
Powders
Electrodes
Lithium
Sol-gels
Differential scanning calorimetry
Metals
Heat treatment
X ray diffraction
Scanning electron microscopy
Lithium-ion batteries

Keywords

  • CeO coating
  • LiNiCoO
  • Lithium batteries
  • Sol-gel synthesis
  • Surface modification

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

Effects of surface modification on the cycling stability of LiNi 0.8Co0.2O2 electrodes by CeO2 coating. / Ha, Hyung Wook; Jeong, Kyung Hee; Yun, Nan Ji; Hong, Ming Zi; Kim, Keon.

In: Electrochimica Acta, Vol. 50, No. 18, 10.06.2005, p. 3764-3769.

Research output: Contribution to journalArticle

Ha, Hyung Wook ; Jeong, Kyung Hee ; Yun, Nan Ji ; Hong, Ming Zi ; Kim, Keon. / Effects of surface modification on the cycling stability of LiNi 0.8Co0.2O2 electrodes by CeO2 coating. In: Electrochimica Acta. 2005 ; Vol. 50, No. 18. pp. 3764-3769.
@article{2bf54cda114b45938885c72b2e19c14c,
title = "Effects of surface modification on the cycling stability of LiNi 0.8Co0.2O2 electrodes by CeO2 coating",
abstract = "A high-performance LiNi0.8Co0.2O2 cathode was successfully fabricated by a sol-gel coating of CeO2 to the surface of the LiNi0.8Co0.2O2 powder and subsequent heat treatment at 700 °C for 5 h. The surface-modified and pristine LiNi0.8Co0.2O2 powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), slow rate cyclic voltammogram (CV), and differential scanning calorimetry (DSC). Unlike pristine LiNi0.8Co0.2O2, the CeO 2-coated LiNi0.8Co0.2O2 cathode exhibits no decrease in its original specific capacity of 182 mAh/g (versus lithium metal) and excellent capacity retention (95{\%} of its initial capacity) between 4.5 and 2.8 V after 55 cycles. The results indicate that the surface treatment should be an effective way to improve the comprehensive properties of the cathode materials for lithium ion batteries.",
keywords = "CeO coating, LiNiCoO, Lithium batteries, Sol-gel synthesis, Surface modification",
author = "Ha, {Hyung Wook} and Jeong, {Kyung Hee} and Yun, {Nan Ji} and Hong, {Ming Zi} and Keon Kim",
year = "2005",
month = "6",
day = "10",
doi = "10.1016/j.electacta.2005.01.022",
language = "English",
volume = "50",
pages = "3764--3769",
journal = "Electrochimica Acta",
issn = "0013-4686",
publisher = "Elsevier Limited",
number = "18",

}

TY - JOUR

T1 - Effects of surface modification on the cycling stability of LiNi 0.8Co0.2O2 electrodes by CeO2 coating

AU - Ha, Hyung Wook

AU - Jeong, Kyung Hee

AU - Yun, Nan Ji

AU - Hong, Ming Zi

AU - Kim, Keon

PY - 2005/6/10

Y1 - 2005/6/10

N2 - A high-performance LiNi0.8Co0.2O2 cathode was successfully fabricated by a sol-gel coating of CeO2 to the surface of the LiNi0.8Co0.2O2 powder and subsequent heat treatment at 700 °C for 5 h. The surface-modified and pristine LiNi0.8Co0.2O2 powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), slow rate cyclic voltammogram (CV), and differential scanning calorimetry (DSC). Unlike pristine LiNi0.8Co0.2O2, the CeO 2-coated LiNi0.8Co0.2O2 cathode exhibits no decrease in its original specific capacity of 182 mAh/g (versus lithium metal) and excellent capacity retention (95% of its initial capacity) between 4.5 and 2.8 V after 55 cycles. The results indicate that the surface treatment should be an effective way to improve the comprehensive properties of the cathode materials for lithium ion batteries.

AB - A high-performance LiNi0.8Co0.2O2 cathode was successfully fabricated by a sol-gel coating of CeO2 to the surface of the LiNi0.8Co0.2O2 powder and subsequent heat treatment at 700 °C for 5 h. The surface-modified and pristine LiNi0.8Co0.2O2 powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), slow rate cyclic voltammogram (CV), and differential scanning calorimetry (DSC). Unlike pristine LiNi0.8Co0.2O2, the CeO 2-coated LiNi0.8Co0.2O2 cathode exhibits no decrease in its original specific capacity of 182 mAh/g (versus lithium metal) and excellent capacity retention (95% of its initial capacity) between 4.5 and 2.8 V after 55 cycles. The results indicate that the surface treatment should be an effective way to improve the comprehensive properties of the cathode materials for lithium ion batteries.

KW - CeO coating

KW - LiNiCoO

KW - Lithium batteries

KW - Sol-gel synthesis

KW - Surface modification

UR - http://www.scopus.com/inward/record.url?scp=19144366360&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=19144366360&partnerID=8YFLogxK

U2 - 10.1016/j.electacta.2005.01.022

DO - 10.1016/j.electacta.2005.01.022

M3 - Article

AN - SCOPUS:19144366360

VL - 50

SP - 3764

EP - 3769

JO - Electrochimica Acta

JF - Electrochimica Acta

SN - 0013-4686

IS - 18

ER -