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Titolo:
Electrochemical properties and thermal stability of LiaNi1-xCoxO2 cathode materials
Autore:
Cho, JP; Jung, HS; Park, YC; Kim, GB; Lim, HS;
Indirizzi:
Samsung Display Devices Co, Chonan, Chungchongnam D, South Korea Samsung Display Devices Co Chonan Chungchongnam D South Korea outh Korea
Titolo Testata:
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
fascicolo: 1, volume: 147, anno: 2000,
pagine: 15 - 20
SICI:
0013-4651(200001)147:1<15:EPATSO>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
SECONDARY LITHIUM CELLS; LINIO2; R(3)OVER-BAR-M; ELECTRODE; BATTERIES; LICOO2;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Cho, JP Samsung Display Devices Co, Chonan, Chungchongnam D, South Korea Samsung Display Devices Co Chonan Chungchongnam D South Korea ea
Citazione:
J.P. Cho et al., "Electrochemical properties and thermal stability of LiaNi1-xCoxO2 cathode materials", J ELCHEM SO, 147(1), 2000, pp. 15-20

Abstract

Conductive and electrochemical properties as well as thermal stability of LiaNil-xCoxO2 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 less than or equal to 0.8) increases substantially when the cobalt content is increased to x = 0.3 from 0.2. The mobility, chemical diffusion coefficient, and Li+ ion diffusion coefficient in the partially charged material are in the neighborhood of 10(-6) cm(-2)/V s, 10(-8) cm(2)/s, and 5 x 10(-10) cm(2)/s, respectively, and are rather insensitive to the values of a and x. Results of electrochemical and DSC studies show that LiNi0.7Co0.3O2 is the best cathode material for a Li cell of all materials studied here in view of thebest cycle stability, the smallest irreversible capacity, and the greatestthermal stability with minimal reduction of specific capacity from that ofLiNiO2. (C) 2000 The Electrochemical Society. S0013-4651(99)04-113-9. All rights reserved.

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Documento generato il 09/07/20 alle ore 01:34:36