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Relationship between physical properties and electrochemical performances for Li1+yNixCo1−2xMnxO2 positive active materials by Kenji Shizuka; Shouji Takano; Kenji Okahara is a Engineering article available to read on EtoBox.

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We investigated the relationship between physical properties and electrochemical performances for Li 1+y Ni x Co 1-2x Mn x O 2 positive active materials. The improvement of rate capability by excess Li was related to the increased electrical conductivity that was accompanied by Ni 3+ increase. Electrochemical impedance measurements indicated that the charge-transfer resistance decreases with increased excess Li content (electrical conductivity) for Li 1+y Ni x Co 1-2x Mn x O 2 . The value of charge-transfer resistance was compared with the simulated value by the equivalent circuits' model considering the volume resistivity of positive active material.

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Author

Kenji Shizuka; Shouji Takano; Kenji Okahara

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0378-7753)

Published

2007

Language

EN

Field

Engineering (Physical Sciences)