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Title: Electrochemical properties and thermal stability of Li{sub {alpha}}Ni{sub 1{minus}x}Co{sub x}O{sub 2} cathode materials

Abstract

Conductive and electrochemical properties as well as thermal stability of Li{sub a}Ni{sub 1{minus}x}Co{sub x}O{sub 2} where x = 0--0.3 and a = 1.0--0.4 have been studied using impedance spectroscopy, galvanostatic intermittent titration technique, cyclic voltammetry, electrochemical cycling, and differential scanning calorimetry (DSC). The electronic conductivity of partially charged material (a {le} 0.8) increases substantially when the cobalt content is increased to x = 0.3 from 0.2. The mobility, chemical diffusion coefficient, and Li{sup +} ion diffusion coefficient in the partially charged material are in the neighborhood of 10{sup {minus}6}cm{sup {minus}2}/V x, 10{sup {minus}8}cm{sup 2}/s, and 5 x 10{sup {minus}10}cm{sup 2}/s, respectively, and are rather insensitive to the values of a and x. Results of electrochemical and DSC studies show that LiNi{sub 0.7}Co{sub 0.3}O{sub 2} is the best cathode material for a Li cell of all materials studied here in view of the best cycle stability, the smallest irreversible capacity, and the greatest thermal stability with minimal reduction of specific capacity from that of LiNiO{sub 2}.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Samsung Display Devices Co., Chonan (KR)
OSTI Identifier:
20014478
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 147; Journal Issue: 1; Other Information: PBD: Jan 2000; Journal ID: ISSN 0013-4651
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; METAL-NONMETAL BATTERIES; CATHODES; LITHIUM OXIDES; NICKEL OXIDES; COBALT OXIDES; ELECTRIC CONDUCTIVITY; THERMODYNAMIC PROPERTIES

Citation Formats

Cho, J, Jung, H S, Park, Y C, Kim, G B, and Lim, H S. Electrochemical properties and thermal stability of Li{sub {alpha}}Ni{sub 1{minus}x}Co{sub x}O{sub 2} cathode materials. United States: N. p., 2000. Web. doi:10.1149/1.1393137.
Cho, J, Jung, H S, Park, Y C, Kim, G B, & Lim, H S. Electrochemical properties and thermal stability of Li{sub {alpha}}Ni{sub 1{minus}x}Co{sub x}O{sub 2} cathode materials. United States. https://doi.org/10.1149/1.1393137
Cho, J, Jung, H S, Park, Y C, Kim, G B, and Lim, H S. 2000. "Electrochemical properties and thermal stability of Li{sub {alpha}}Ni{sub 1{minus}x}Co{sub x}O{sub 2} cathode materials". United States. https://doi.org/10.1149/1.1393137.
@article{osti_20014478,
title = {Electrochemical properties and thermal stability of Li{sub {alpha}}Ni{sub 1{minus}x}Co{sub x}O{sub 2} cathode materials},
author = {Cho, J and Jung, H S and Park, Y C and Kim, G B and Lim, H S},
abstractNote = {Conductive and electrochemical properties as well as thermal stability of Li{sub a}Ni{sub 1{minus}x}Co{sub x}O{sub 2} where x = 0--0.3 and a = 1.0--0.4 have been studied using impedance spectroscopy, galvanostatic intermittent titration technique, cyclic voltammetry, electrochemical cycling, and differential scanning calorimetry (DSC). The electronic conductivity of partially charged material (a {le} 0.8) increases substantially when the cobalt content is increased to x = 0.3 from 0.2. The mobility, chemical diffusion coefficient, and Li{sup +} ion diffusion coefficient in the partially charged material are in the neighborhood of 10{sup {minus}6}cm{sup {minus}2}/V x, 10{sup {minus}8}cm{sup 2}/s, and 5 x 10{sup {minus}10}cm{sup 2}/s, respectively, and are rather insensitive to the values of a and x. Results of electrochemical and DSC studies show that LiNi{sub 0.7}Co{sub 0.3}O{sub 2} is the best cathode material for a Li cell of all materials studied here in view of the best cycle stability, the smallest irreversible capacity, and the greatest thermal stability with minimal reduction of specific capacity from that of LiNiO{sub 2}.},
doi = {10.1149/1.1393137},
url = {https://www.osti.gov/biblio/20014478}, journal = {Journal of the Electrochemical Society},
issn = {0013-4651},
number = 1,
volume = 147,
place = {United States},
year = {2000},
month = {1}
}