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

Chapter 1 Introduction

1.1-  Motivation: Li-Co-Mn-Ni Oxide Materials

1.2  -Layered and Spinel Structures

1.3 - TheLi-Co-Mn-O Face of the Pyramid

1.4-  TheLi-Mn-Ni-OFace of the Pyramid

1.4.1- Li-Mn-Ni-O Spinel Solid-Solutions

1.4.2- Li-Mn-Ni-O Layered Solid-Solutions

1.4.3- The Co-Existence Region Between theS pinel and Layered Struc­tures

1.5- Structure of this Thesis

 

 

Chapter 2 Experimental and Theoretical Considerations

2.1- Sample Preparation.

2.1.1-   Synthesis of Combinatorial Samples

2.1.2-   Synthesis of Bulk Samples

2.2- X-Ray Di?raction.

2.2.1- High Throughput XRD of Combinatorial Samples

2.2.2- XRD of Bulk Samples

2.3- Fitting of Combinatorial XRD Patterns.

2.4- Methods to Generate the Phase Diagrams

2.5- Electrochemical Tests

2.6- Thermo-Gravimetric Analysis

2.7- Elemental Analysis

2.8- Scanning Electron Microscopy

2.9- Redox Titration

2.10- X-Ray Absorption Spectroscopy

2.11- Helium Pycnometry

2.12- Monte Carlo Simulations

 

Chapter 3 Optimization of the Synthesis of Combinatorial Samples

 

3.1- Experimental Design

3.2- TGA Results for Lithium Loss During Synthesis

3.3- XRD Results of Lithium Loss

3.3.1- Combinatorial samples

3.3.2- Combinatorial Samples During Synthesis

3.4- Conclusions Regarding Synthesis of Combinatorial Samples

 

Chapter 4 Combinatorial Studies in the Li-Co-Mn-O System

 

4.1- Experimental Design

4.2- Spinel -Layered Co-Existence Region

4.3-  LiCoO2 -Li2MnO3

4.4-  Monte Carlo Simulation

4.5-   Conclusions Regarding the Formation of Layered-Layered Composites intheLi-Co-Mn-OSystem

 

Chapter 5       Combinatorial Studies of the Spinel and Rocksalt Re­gions in the Li-Mn-Ni-O System

 

5.1- Experimental Design

5.3- Rocksalt Single-Phase

Eric McCalla was born and raised in Quebec City.  He completed his undergraduate degree at Mount Allison University in 2000 before earning a Masters in Solid State Physics at McGill University.  Following the completion of the Master's in 2002, he become a computer science teacher in Kuujjuaraapik, an Inuit community in Northern Quebec.   After two years of teaching, he decided to become a teacher and followed the Bachelor of Education program at Memorial University of Newfoundland.  He then worked as a high school mathematics and science teacher in a small high school in Sept-Iles, Quebec.  After biking across Canada while on sabbatical, McCalla decided to return to graduate school in 2010.  The results derived in the following three years at Dalhousie University working in the group of Jeff Dahn and are the subject of this book.  McCalla is currently a Post-Doctoral Fellow at the Collège-de-France in Paris in the group of Jean-Marie Tarascon.