Thermal behavior of Li1-yNiO2 and the decomposition mechanism

Hajime Arai, Shigeto Okada, Yoji Sakurai, Jun Ichi Yamaki

Research output: Contribution to journalArticle

222 Citations (Scopus)

Abstract

We report the thermal behavior of Li1-yNiO2 up to 300°C which we investigated using thermogravimetry (TG) and differential scanning calorimetry (DSC). The decomposition mechanism was studied using the X-ray diffraction data obtained for the thermally decomposed products. At about 200°C Li1-yNiO2 turned into Li(1-y)/(2-y)Ni1/(2-y)O which has a rock-salt structure. This was accompanied by oxygen evolution. A significant exothermic process was observed for compounds with y ≥ 0.7 and this resulted in products with disordered rock-salt structures. Using these results, we propose a mechanism in which the exothermic behavior is caused by random cation mixing.

Original languageEnglish
Pages (from-to)295-302
Number of pages8
JournalSolid State Ionics
Volume109
Issue number3-4
Publication statusPublished - Jun 2 1998
Externally publishedYes

Fingerprint

halites
Salts
Rocks
Decomposition
decomposition
products
thermogravimetry
Thermogravimetric analysis
Cations
Differential scanning calorimetry
heat measurement
Positive ions
Oxygen
cations
X ray diffraction
scanning
oxygen
diffraction
x rays
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Arai, H., Okada, S., Sakurai, Y., & Yamaki, J. I. (1998). Thermal behavior of Li1-yNiO2 and the decomposition mechanism. Solid State Ionics, 109(3-4), 295-302.

Thermal behavior of Li1-yNiO2 and the decomposition mechanism. / Arai, Hajime; Okada, Shigeto; Sakurai, Yoji; Yamaki, Jun Ichi.

In: Solid State Ionics, Vol. 109, No. 3-4, 02.06.1998, p. 295-302.

Research output: Contribution to journalArticle

Arai, H, Okada, S, Sakurai, Y & Yamaki, JI 1998, 'Thermal behavior of Li1-yNiO2 and the decomposition mechanism', Solid State Ionics, vol. 109, no. 3-4, pp. 295-302.
Arai H, Okada S, Sakurai Y, Yamaki JI. Thermal behavior of Li1-yNiO2 and the decomposition mechanism. Solid State Ionics. 1998 Jun 2;109(3-4):295-302.
Arai, Hajime ; Okada, Shigeto ; Sakurai, Yoji ; Yamaki, Jun Ichi. / Thermal behavior of Li1-yNiO2 and the decomposition mechanism. In: Solid State Ionics. 1998 ; Vol. 109, No. 3-4. pp. 295-302.
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