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Combinatorial Studies in the Li–Co–Mn–O System

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Part of the Springer Theses book series (Springer Theses)

Abstract

The layered single-phase region in the Li–Co–Mn oxide pseudo-ternary system was explored by a solution-based combinatorial approach. The results showed that the layered region is a single composition line corresponding to cobalt being constrained to the 3+ oxidation state only. This composition line, joining LiCoO2 to Li2MnO3, was a solid solution over its entire length when samples were quenched from either 800 or 900 °C. Upon slow cooling, the structures phase separated near the center of the line with the maximum phase separation occurring over the range x = 0.2–0.8 in Li[Li\(_{(1-x)/3}\)Co\(_x\)Mn\(_{(2-2x)/3}\)]O2 when samples were cooled from 900 °C at a rate of 1 °C/min. These endpoints correspond to Co and Mn2Li domains with approximately 20 \(\%\) disorder on the transition metal layers. Such disorder was also found over a range of temperatures during cooling using a Monte Carlo simulation.

Keywords

Phase Separation Near Neighbor Peak Splitting Lever Rule Solid Solution Region 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  1. 1.Physics and Atmospheric Sciences Dept.Dalhousie UniversityHalifax, Nova ScotiaCanada

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