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Titolo:
In situ XAFS study on cathode materials for lithium-ion batteries
Autore:
Nonaka, T; Okuda, C; Ukyo, Y; Okamoto, T;
Indirizzi:
Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan Toyota CentRes & Dev Labs Inc Nagakute Aichi Japan 4801192 801192, Japan
Titolo Testata:
JOURNAL OF SYNCHROTRON RADIATION
, volume: 8, anno: 2001,
parte:, 2
pagine: 869 - 871
SICI:
0909-0495(200103)8:<869:ISXSOC>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
ABSORPTION FINE-STRUCTURE; LINIO2;
Keywords:
rechargeable battery; cathode; nickel; cobalt; in situ measurement;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
6
Recensione:
Indirizzi per estratti:
Indirizzo: Nonaka, T Toyota Cent Res & Dev Labs Inc, 41-1 Aza Yokomichi, Nagakute, Aichi 4801192, Japan Toyota Cent Res & Dev Labs Inc 41-1 Aza Yokomichi Nagakute Aichi Japan 4801192
Citazione:
T. Nonaka et al., "In situ XAFS study on cathode materials for lithium-ion batteries", J SYNCHROTR, 8, 2001, pp. 869-871

Abstract

Ni and Co K-edge X-ray absorption spectra of LiNi0.8Co0.2O2 have been collected using in situ coin cells. To investigate the electronic and structural changes accompanied by the capacity fading during electrochemical cyclingand keeping batteries at high temperatures, the cells with different cycling states and keeping conditions (temperature, time) were prepared. Upon charging the cell, the Ni and Co K absorption edge shifted towards higher energy, and the good correlation between the range of chemical shifts upon charging and the capacity of the cell was observed. From quantitative analysisof EXAFS data, it was revealed that the capacity fading is closely relatedto the Jahn-Teller distortion of the NiO6 octahedron.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 21:55:04