Preparation and electrochemical properties of Zn-doped LiNi0.8Co0.2O2

G. T.K. Fey; J. G. Chen; V. Subramanian; T. Osaka

doi:10.1016/S0378-7753(02)00400-7

Preparation and electrochemical properties of Zn-doped LiNi_0.8Co_0.2O₂

G. T.K. Fey^*, J. G. Chen, V. Subramanian, T. Osaka

^*Corresponding author for this work

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

101 Citations (Scopus)

Abstract

Zn-doped LiZn_yNi_0.8-yCo_0.2O₂ (0.0000 ≤ y ≤ 0.0100) compositions were synthesized by a conventional solid-state method. The products were characterized by XRD, galvanostatic cycling, cyclic voltammetry, electrochemical impedance spectroscopy and thermal analysis. For the LiZn_0.0025Ni_0.7975Co_0.2O₂ system cycled between 3.0 and 4.2 V, the discharge capacities in the 1st and 100th cycles were 170 and 138 mAh/g with charge retention of 81%. The corresponding values for the undoped material were 158 and 97 mAh/g, with charge retention of 61.4%. The improved electrochemical properties of the doped system were attributed to the structural stability derived from incorporating the size-invariant Zn²⁺ ions. The Zn-doped system also showed improved capacity and cyclability when the cycling was performed in a voltage wider window (2.5-4.4V) and at a higher temperature (55°C). The structural and electrochemical properties of the doped and undoped materials were correlated.

Original language	English
Pages (from-to)	384-394
Number of pages	11
Journal	Journal of Power Sources
Volume	112
Issue number	2
DOIs	https://doi.org/10.1016/S0378-7753(02)00400-7
Publication status	Published - 2002 Nov 14
Externally published	Yes

Keywords

Cathode materials
LiNiCoO
Lithiated nickel cobalt oxides
Lithium ion batteries
Zn-doping

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/S0378-7753(02)00400-7

Cite this

@article{c71445a484f746829bf57776cf782449,

title = "Preparation and electrochemical properties of Zn-doped LiNi0.8Co0.2O2",

abstract = "Zn-doped LiZnyNi0.8-yCo0.2O2 (0.0000 ≤ y ≤ 0.0100) compositions were synthesized by a conventional solid-state method. The products were characterized by XRD, galvanostatic cycling, cyclic voltammetry, electrochemical impedance spectroscopy and thermal analysis. For the LiZn0.0025Ni0.7975Co0.2O2 system cycled between 3.0 and 4.2 V, the discharge capacities in the 1st and 100th cycles were 170 and 138 mAh/g with charge retention of 81%. The corresponding values for the undoped material were 158 and 97 mAh/g, with charge retention of 61.4%. The improved electrochemical properties of the doped system were attributed to the structural stability derived from incorporating the size-invariant Zn2+ ions. The Zn-doped system also showed improved capacity and cyclability when the cycling was performed in a voltage wider window (2.5-4.4V) and at a higher temperature (55°C). The structural and electrochemical properties of the doped and undoped materials were correlated.",

keywords = "Cathode materials, LiNiCoO, Lithiated nickel cobalt oxides, Lithium ion batteries, Zn-doping",

author = "Fey, {G. T.K.} and Chen, {J. G.} and V. Subramanian and T. Osaka",

note = "Funding Information: Financial support by the National Science Council of the Republic of China is gratefully acknowledged (NSC-90-2214-E-008-003). One of the authors (V. Subramanian) thanks the National Science Council for the award of a post-doctoral fellowship. ",

year = "2002",

month = nov,

day = "14",

doi = "10.1016/S0378-7753(02)00400-7",

language = "English",

volume = "112",

pages = "384--394",

journal = "Journal of Power Sources",

issn = "0378-7753",

publisher = "Elsevier",

number = "2",

}

TY - JOUR

T1 - Preparation and electrochemical properties of Zn-doped LiNi0.8Co0.2O2

AU - Fey, G. T.K.

AU - Chen, J. G.

AU - Subramanian, V.

AU - Osaka, T.

N1 - Funding Information: Financial support by the National Science Council of the Republic of China is gratefully acknowledged (NSC-90-2214-E-008-003). One of the authors (V. Subramanian) thanks the National Science Council for the award of a post-doctoral fellowship.

PY - 2002/11/14

Y1 - 2002/11/14

N2 - Zn-doped LiZnyNi0.8-yCo0.2O2 (0.0000 ≤ y ≤ 0.0100) compositions were synthesized by a conventional solid-state method. The products were characterized by XRD, galvanostatic cycling, cyclic voltammetry, electrochemical impedance spectroscopy and thermal analysis. For the LiZn0.0025Ni0.7975Co0.2O2 system cycled between 3.0 and 4.2 V, the discharge capacities in the 1st and 100th cycles were 170 and 138 mAh/g with charge retention of 81%. The corresponding values for the undoped material were 158 and 97 mAh/g, with charge retention of 61.4%. The improved electrochemical properties of the doped system were attributed to the structural stability derived from incorporating the size-invariant Zn2+ ions. The Zn-doped system also showed improved capacity and cyclability when the cycling was performed in a voltage wider window (2.5-4.4V) and at a higher temperature (55°C). The structural and electrochemical properties of the doped and undoped materials were correlated.

AB - Zn-doped LiZnyNi0.8-yCo0.2O2 (0.0000 ≤ y ≤ 0.0100) compositions were synthesized by a conventional solid-state method. The products were characterized by XRD, galvanostatic cycling, cyclic voltammetry, electrochemical impedance spectroscopy and thermal analysis. For the LiZn0.0025Ni0.7975Co0.2O2 system cycled between 3.0 and 4.2 V, the discharge capacities in the 1st and 100th cycles were 170 and 138 mAh/g with charge retention of 81%. The corresponding values for the undoped material were 158 and 97 mAh/g, with charge retention of 61.4%. The improved electrochemical properties of the doped system were attributed to the structural stability derived from incorporating the size-invariant Zn2+ ions. The Zn-doped system also showed improved capacity and cyclability when the cycling was performed in a voltage wider window (2.5-4.4V) and at a higher temperature (55°C). The structural and electrochemical properties of the doped and undoped materials were correlated.

KW - Cathode materials

KW - LiNiCoO

KW - Lithiated nickel cobalt oxides

KW - Lithium ion batteries

KW - Zn-doping

UR - http://www.scopus.com/inward/record.url?scp=0037079088&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037079088&partnerID=8YFLogxK

U2 - 10.1016/S0378-7753(02)00400-7

DO - 10.1016/S0378-7753(02)00400-7

M3 - Article

AN - SCOPUS:0037079088

SN - 0378-7753

VL - 112

SP - 384

EP - 394

JO - Journal of Power Sources

JF - Journal of Power Sources

IS - 2

ER -