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Reversibility of LiNiO2 cathode

โœ Scribed by Hajime Arai; Shigeto Okada; Yoji Sakurai; Jun-ichi Yamaki

Book ID
104296469
Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
677 KB
Volume
95
Category
Article
ISSN
0167-2738

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โœฆ Synopsis

LiNiO, is a promising cathode material for secondary lithium batteries with a reversible capacity of over 200 mAh gg '.

However, a low cycle efficiency of about 80% is observed in the first charge-discharge cycle. To explain this irreversibility, we have assumed a model in which part of the cathode domain becomes electrochemically inactive before the first discharging starts, while the rest remains electrochemically active throughout the cycle. By this model, the active domain is shown to have excellent reversibility. The reversibility in the first cycle can be improved by limiting the charge capacity. An application of this model to a LiCoO, cathode is also described.

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