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Author Suresh, P. ♦ Shukla, A. K. ♦ Munichandran, N.
Source CSIR-Central Electrochemical Research Institute
Content type Text
Publisher ECS
File Format PDF
Copyright Year ©2005
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Lead acid batteries ♦ Lithium batteries
Abstract 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.
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2005-01-01
Journal PeerReviewed