Suresh, P. and Shukla, A.K. and Munichandran, N. (2005) Electrochemical Properties of LiMn1−xMxO2 „M = Ni, Al, Mg… as Cathode Materials in Lithium-Ion Cells. Journal of the Electrochemical Soceity, 152 (12). pp. 2273-2280.

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Layered LiMn1−xMxO2 M = Ni, Al, Mg has been synthesized over a wide range of composition by ion-exchange from their sodium precursors and characterized. Both the lattice parameters a and c of the hexagonal unit cell increase with x for Ni and Mg substitutions but decrease for Al substitution. As reflected by the broad powder X-ray diffraction peaks, scanning electron micrographs show agglomeration of submicrometer-size particles. The discharge capacity of these cathode materials varies with the nature and concentration of the substituents. LiMn0.95Ni0.05O2 exhibits a specific capacity of about 220 mAh g−1 during the initial cycling, which decays gradually to about 150 mAh g−1 after 30 charge-discharge cycles. LiMn0.95Al0.05O2 and LiMn0.95Mg0.05O2 yield capacity values of 180 and 150 mAh g−1, respectively. Cyclic voltammetry, galvanostatic intermittent titration, and ac impedance data corroborate the observed discharge capacity behavior of these cathode materials.

Item Type: Article
Subjects: Lead acid batteries
Lithium batteries
Depositing User: TTBD CECRI
Date Deposited: 16 Jan 2012 15:40
Last Modified: 16 Jan 2012 15:40

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