Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
Notes
Relaxation Analysis of Graphite Anode Materials after Charge-Discharge Cycles
Shigeomi TAKAITakashi KITAMURATakeshi YABUTSUKATakeshi YAO
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2020 年 88 巻 5 号 p. 434-436

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Relaxation analysis has been carried out on fresh and charge-discharge cycled graphites to evaluate the effect of cycle process on the relaxation behavior after lithium insertion. While the formed stage I at charging partly transforms into stage II during relaxation, the cycled samples exhibit smaller fraction of transformation. The charge-discharge cycles also restrict the relaxation variation in c-axis of stage II, even though lithium occupation ordering similarly occurs between the fresh and cycled samples. Variation in c-length of stage II would be the results of stage transformation from I into II, and charge-discharge process enables to follow the equilibrium stages rapidly at charging.

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© The Author(s) 2020. Published by ECSJ.

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