Consequences of Combinatorial Studies of Positive Electrodes for Li-ion Batteries

  • Eric McCalla
Part of the Springer Theses book series (Springer Theses)

About this book

Introduction

Li-Co-Mn-Ni oxides have been of extreme interest as potential positive electrode materials for next generation Li-ion batteries.  Though many promising materials have been discovered and studied extensively, much debate remains in the literature about the structures of these materials.  There is no consensus as to whether the lithium-rich layered materials are single-phase or form a layered-layered composite on the few nanometer length-scales.  Much of this debate came about because no phase diagrams existed to describe these systems under the synthesis conditions used to make electrode materials.  Detailed in this thesis are the complete Li-Co-Mn-O and Li-Mn-Ni-O phase diagrams generated by way of the combinatorial synthesis of mg-scale samples at over five hundred compositions characterized with X-ray diffraction.  Selected bulk samples were used to confirm that the findings are relevant to synthesis conditions used commercially.  The results  help resolve a number of points of confusion and contradiction in the literature.  Amongst other important findings, the compositions and synthesis conditions giving rise to layered-layered nano-composites are presented and electrochemical results are used to show how better electrode materials can be achieved by making samples in the single phase-layered regions.

Keywords

Combinatorial Science Li-Co-Mn-O systems Li-Mn-Ni-O systems Li-ion Batteries Positive Electrodes XRD Analysis

Authors and affiliations

  • Eric McCalla
    • 1
  1. 1.Physics and Atmospheric Sciences Dept.Dalhousie UniversityQuebecCanada

Bibliographic information

  • DOI https://doi.org/10.1007/978-3-319-05849-8
  • Copyright Information Springer International Publishing Switzerland 2014
  • Publisher Name Springer, Cham
  • eBook Packages Chemistry and Materials Science
  • Print ISBN 978-3-319-05848-1
  • Online ISBN 978-3-319-05849-8
  • Series Print ISSN 2190-5053
  • Series Online ISSN 2190-5061
  • About this book