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

doi:10.1016/j.electacta.2005.01.022

Effects of surface modification on the cycling stability of LiNi _0.8Co_0.2O₂ electrodes by CeO₂ coating

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

* Honorary professors

Research output: Contribution to journal › Article › peer-review

50 Citations (Scopus)

Abstract

A high-performance LiNi_0.8Co_0.2O₂ cathode was successfully fabricated by a sol-gel coating of CeO₂ to the surface of the LiNi_0.8Co_0.2O₂ powder and subsequent heat treatment at 700 °C for 5 h. The surface-modified and pristine LiNi_0.8Co_0.2O₂ powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), slow rate cyclic voltammogram (CV), and differential scanning calorimetry (DSC). Unlike pristine LiNi_0.8Co_0.2O₂, the CeO ₂-coated LiNi_0.8Co_0.2O₂ 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 language	English
Pages (from-to)	3764-3769
Number of pages	6
Journal	Electrochimica Acta
Volume	50
Issue number	18
DOIs	https://doi.org/10.1016/j.electacta.2005.01.022
Publication status	Published - 2005 Jun 10

Bibliographical note

Funding Information:
This research was performed by the financial support of ‘Center for Nanostructured Materials Technology’ under ‘21st Century Frontier R&D Programs’ of the Ministry of Science and Technology, and supported by the Korea Science and Engineering Foundation through the Research Center for Energy Conversion & Storage, Korea.

Keywords

CeO coating
LiNiCoO
Lithium batteries
Sol-gel synthesis
Surface modification

ASJC Scopus subject areas

Chemical Engineering(all)
Electrochemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.electacta.2005.01.022

Cite this

@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",

note = "Funding Information: This research was performed by the financial support of {\textquoteleft}Center for Nanostructured Materials Technology{\textquoteright} under {\textquoteleft}21st Century Frontier R&D Programs{\textquoteright} of the Ministry of Science and Technology, and supported by the Korea Science and Engineering Foundation through the Research Center for Energy Conversion & Storage, Korea.",

year = "2005",

month = jun,

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

N1 - Funding Information: This research was performed by the financial support of ‘Center for Nanostructured Materials Technology’ under ‘21st Century Frontier R&D Programs’ of the Ministry of Science and Technology, and supported by the Korea Science and Engineering Foundation through the Research Center for Energy Conversion & Storage, Korea.

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

U2 - 10.1016/j.electacta.2005.01.022

DO - 10.1016/j.electacta.2005.01.022

M3 - Article

AN - SCOPUS:19144366360

SN - 0013-4686

VL - 50

SP - 3764

EP - 3769

JO - Electrochimica Acta

JF - Electrochimica Acta

IS - 18

ER -