Electrochemical properties of LiNi0.8Co0.2-xAl xO2 prepared by a sol-gel method

Chang Joo Han; Jang Hyuk Yoon; Won Il Cho; Ho Jang

doi:10.1016/j.jpowsour.2004.05.006

Electrochemical properties of LiNi_0.8Co_0.2-xAl _xO₂ prepared by a sol-gel method

Chang Joo Han, Jang Hyuk Yoon, Won Il Cho, Ho Jang

Department of Materials Science and Engineering

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

105 Citations (Scopus)

Abstract

Prospective positive-electrode (cathode) materials for a lithium secondary battery, viz., LiNi_0.8Co_0.2-xAl_xO₂ (x = 0.00, 0.01, 0.03, and 0.05), were synthesized using a sol-gel method and the structural and electrochemical properties are examined by means of X-ray diffraction, cyclic voltammetry, and charge-discharge tests. The LiNi _0.8Co_0.2-xAl_xO₂ maintains the α-NaFeO₂-type layered structure regardless of the aluminium content in the range x ≤ 0.05. On the other hand, as the aluminium content is increased, the capacity retention of LiNi_0.8Co _0.2-xAl_xO₂ is improved while initial discharge capacity is slightly decreased. Results also show that the current peaks on the cyclic voltammograms are diminished and merged on aluminium addition. This suggests that the improved cycle stability of LiNi_0.8Co _0.2-xAl_xO₂ is due to suppression of the phase transition.

Original language	English
Pages (from-to)	132-138
Number of pages	7
Journal	Journal of Power Sources
Volume	136
Issue number	1
DOIs	https://doi.org/10.1016/j.jpowsour.2004.05.006
Publication status	Published - 2004 Sept 10

Keywords

LiNi CoAlO
Lithium secondary battery
Phase transition
Positive electrode
Sol-gel method

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

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

Access to Document

10.1016/j.jpowsour.2004.05.006

Cite this

@article{ca305931fce14614b6b6b67d22348760,

title = "Electrochemical properties of LiNi0.8Co0.2-xAl xO2 prepared by a sol-gel method",

abstract = "Prospective positive-electrode (cathode) materials for a lithium secondary battery, viz., LiNi0.8Co0.2-xAlxO2 (x = 0.00, 0.01, 0.03, and 0.05), were synthesized using a sol-gel method and the structural and electrochemical properties are examined by means of X-ray diffraction, cyclic voltammetry, and charge-discharge tests. The LiNi 0.8Co0.2-xAlxO2 maintains the α-NaFeO2-type layered structure regardless of the aluminium content in the range x ≤ 0.05. On the other hand, as the aluminium content is increased, the capacity retention of LiNi0.8Co 0.2-xAlxO2 is improved while initial discharge capacity is slightly decreased. Results also show that the current peaks on the cyclic voltammograms are diminished and merged on aluminium addition. This suggests that the improved cycle stability of LiNi0.8Co 0.2-xAlxO2 is due to suppression of the phase transition.",

keywords = "LiNi CoAlO, Lithium secondary battery, Phase transition, Positive electrode, Sol-gel method",

author = "Han, {Chang Joo} and Yoon, {Jang Hyuk} and Cho, {Won Il} and Ho Jang",

note = "Funding Information: The research was performed with financial support from the Center for Nanostructure Materials Technology under {\textquoteleft}21st Century Frontier R&D Programs{\textquoteright} of the Ministry of Science and Technology, Korea.",

year = "2004",

month = sep,

day = "10",

doi = "10.1016/j.jpowsour.2004.05.006",

language = "English",

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T1 - Electrochemical properties of LiNi0.8Co0.2-xAl xO2 prepared by a sol-gel method

AU - Han, Chang Joo

AU - Yoon, Jang Hyuk

AU - Cho, Won Il

AU - Jang, Ho

N1 - Funding Information: The research was performed with financial support from the Center for Nanostructure Materials Technology under ‘21st Century Frontier R&D Programs’ of the Ministry of Science and Technology, Korea.

PY - 2004/9/10

Y1 - 2004/9/10

N2 - Prospective positive-electrode (cathode) materials for a lithium secondary battery, viz., LiNi0.8Co0.2-xAlxO2 (x = 0.00, 0.01, 0.03, and 0.05), were synthesized using a sol-gel method and the structural and electrochemical properties are examined by means of X-ray diffraction, cyclic voltammetry, and charge-discharge tests. The LiNi 0.8Co0.2-xAlxO2 maintains the α-NaFeO2-type layered structure regardless of the aluminium content in the range x ≤ 0.05. On the other hand, as the aluminium content is increased, the capacity retention of LiNi0.8Co 0.2-xAlxO2 is improved while initial discharge capacity is slightly decreased. Results also show that the current peaks on the cyclic voltammograms are diminished and merged on aluminium addition. This suggests that the improved cycle stability of LiNi0.8Co 0.2-xAlxO2 is due to suppression of the phase transition.

AB - Prospective positive-electrode (cathode) materials for a lithium secondary battery, viz., LiNi0.8Co0.2-xAlxO2 (x = 0.00, 0.01, 0.03, and 0.05), were synthesized using a sol-gel method and the structural and electrochemical properties are examined by means of X-ray diffraction, cyclic voltammetry, and charge-discharge tests. The LiNi 0.8Co0.2-xAlxO2 maintains the α-NaFeO2-type layered structure regardless of the aluminium content in the range x ≤ 0.05. On the other hand, as the aluminium content is increased, the capacity retention of LiNi0.8Co 0.2-xAlxO2 is improved while initial discharge capacity is slightly decreased. Results also show that the current peaks on the cyclic voltammograms are diminished and merged on aluminium addition. This suggests that the improved cycle stability of LiNi0.8Co 0.2-xAlxO2 is due to suppression of the phase transition.

KW - LiNi CoAlO

KW - Lithium secondary battery

KW - Phase transition

KW - Positive electrode

KW - Sol-gel method

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