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.
| ISBN: | 9783319383170 |
| Publication date: | 3rd September 2016 |
| Author: | Eric McCalla |
| Publisher: | Springer an imprint of Springer International Publishing |
| Format: | Paperback |
| Pagination: | 146 pages |
| Series: | Springer Theses |
| Genres: |
Computational chemistry Electrochemistry and magnetochemistry Testing of materials Energy, power generation, distribution and storage |
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.
Consequences of Combinatorial Studies of Positive Electrodes for Li-Ion Batteries features in the following genres: Computational chemistry, Electrochemistry and magnetochemistry, Testing of materials, Energy, power generation, distribution and storage
Consequences of Combinatorial Studies of Positive Electrodes for Li-Ion Batteries is available in Paperback, Hardback
Consequences of Combinatorial Studies of Positive Electrodes for Li-Ion Batteries was written by Eric McCalla and published by Springer an imprint of Springer International Publishing
Consequences of Combinatorial Studies of Positive Electrodes for Li-Ion Batteries has 146 pages
Yes it is part of Springer Theses series