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Titolo:
Charge-discharge stability of graphite anodes for lithium-ion batteries
Autore:
Wang, CS; Appleby, AJ; Little, FE;
Indirizzi:
Texas A&M Univ, Texas Engn Expt Stn, Ctr Electrochem Syst & Hydrogen Res, College Stn, TX 77843 USA Texas A&M Univ College Stn TX USA 77843 en Res, College Stn, TX 77843 USA Texas A&M Univ, Texas Engn Expt Stn, Ctr Space Power, College Stn, TX 77843 USA Texas A&M Univ College Stn TX USA 77843 Power, College Stn, TX 77843 USA
Titolo Testata:
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
fascicolo: 1-2, volume: 497, anno: 2001,
pagine: 33 - 46
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTROCHEMICAL IMPEDANCE; INTERCALATION; ELECTRODES; POWDER;
Keywords:
electrochemical reaction kinetics; intrinsic resistance; electrochemical impedance spectroscopy; thermal stability;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Wang, CS Texas A&M Univ, Texas Engn Expt Stn, Ctr Electrochem Syst & Hydrogen Res, College Stn, TX 77843 USA Texas A&M Univ College Stn TX USA 77843ollege Stn, TX 77843 USA
Citazione:
C.S. Wang et al., "Charge-discharge stability of graphite anodes for lithium-ion batteries", J ELEC CHEM, 497(1-2), 2001, pp. 33-46

Abstract

A graphite powder disk sandwiched between two nickel screens was used as alithium-insertion working electrode. Electrochemical impedance spectroscopy (EIS), galvanostatic intermittent titration (GIT) using pulsed microcurrent, and in-situ intrinsic resistance measurements were used for the evaluation of kinetics and intrinsic (i.e. physical) resistance changes during charge-discharge cycling from room temperature to elevated temperatures. The investigation of the thermal stability of the electrolyte at elevated temperature used an EIS study of a palladium electrode in the electrolyte. EIS measurements for electrochemical reaction and intrinsic resistances of a graphite electrode show that the first high-frequency depressed semicircle is due to the 'solid electrolyte interphase' (SEI) film, although it is also influenced by the electrode contact impedance. The growth of the SEI film on the MCMB 10-28 graphite electrode surface with cycling, results in a decline in kinetic rate and a corresponding increase in contact resistance givingrapid capacity fade. The high stability of the capacity of JM 287 electrodes is due to the slow increase in SEI film thickness on their surfaces. Although new SEI films were formed on the originals at elevated temperature, the kinetics were still more rapid than at room temperature in the initial cycling. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/07/18 alle ore 13:23:40