An XRD Study of Chemical Self-Discharge in Delithiated Cobalt Oxide - Archive ouverte HAL
Article Dans Une Revue Electrochemical and Solid-State Letters Année : 2004

An XRD Study of Chemical Self-Discharge in Delithiated Cobalt Oxide

Résumé

Changes in samples of Li1–xCoO2 were measured by X-ray diffractometry (XRD) after thermal aging treatments that cause capacity losses in electrochemical cells. Changes in lattice parameters were used to identify lithium re-intercalation into Li1–xCoO2 when it was aged in the presence of LiClO4, LiPF6, and LiAsF6 in propylene carbonate (PC). Li+ re-intercalation could account for the reversible capacity loss. Thermal aging at 75°C in pure PC or pure argon gas resulted in other changes that are attributed to the formation of spinel phase. The rate of the lithium re-intercalation increases in the following sequence: LiPF6<.LiClO4

Dates et versions

hal-00417865 , version 1 (17-09-2009)

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Yasunori Ozawa, Rachid Yazami, Brent Fultz. An XRD Study of Chemical Self-Discharge in Delithiated Cobalt Oxide. Electrochemical and Solid-State Letters, 2004, 8, pp. A38-A41. ⟨10.1149/1.1830395⟩. ⟨hal-00417865⟩
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