Abstract
The development of rechargeable lithium batteries with a high mass capacity, made with non-toxic and low cost materials is an important industrial challenge. Morphological and structural modifications occurring in the electrode materials during charge-output cycles should not lower the electrochemical characteristics and the cycling properties of the battery. Thus the structure of electrode materials must be sufficiently deformable and stable to support the constraints linked with lithium intercalation and de-intercalation (ions and electrons absorption/extraction). The aim of this work is to explain some characteristics (mass capacity, ions and electrons mobility, cycling) using the relation between some mechanisms of lithium insertion (sites occupation, lattice reduction mods) and the nature of atoms and chemical bonds (covalence, ionicity). This approach is developed on 2-D models of crystallized and vitreous sulfur compounds (CdI{sub 2} type) with a large inter-sheet distance, and on 3-D spinel models with a huge number of vacant sites. The method is based on a correlation between experimental studies (XAFS, DX, Moessbauer, XPS) and theoretical calculations and on the electronic and electrochemical characteristics. The model proposed should allow to improve materials in a predictive way (type of substitution) or to imagine new materials. (J.S.) 15 refs.
Olivier-Fourcade, J;
Branci, C;
Sarradin, J;
Jumas, J C
[1]
- Montpellier-2 Univ., 34 (France). Laboratoire de Physicochimie de la Matiere Condensee
Citation Formats
Olivier-Fourcade, J, Branci, C, Sarradin, J, and Jumas, J C.
A fundamental approach to better understand the lithium insertion mechanisms in electrode materials; Une approche fondamentale pour mieux comprendre les mecanismes d`insertion du lithium dans les materiaux d`electrodes.
France: N. p.,
1996.
Web.
Olivier-Fourcade, J, Branci, C, Sarradin, J, & Jumas, J C.
A fundamental approach to better understand the lithium insertion mechanisms in electrode materials; Une approche fondamentale pour mieux comprendre les mecanismes d`insertion du lithium dans les materiaux d`electrodes.
France.
Olivier-Fourcade, J, Branci, C, Sarradin, J, and Jumas, J C.
1996.
"A fundamental approach to better understand the lithium insertion mechanisms in electrode materials; Une approche fondamentale pour mieux comprendre les mecanismes d`insertion du lithium dans les materiaux d`electrodes."
France.
@misc{etde_334003,
title = {A fundamental approach to better understand the lithium insertion mechanisms in electrode materials; Une approche fondamentale pour mieux comprendre les mecanismes d`insertion du lithium dans les materiaux d`electrodes}
author = {Olivier-Fourcade, J, Branci, C, Sarradin, J, and Jumas, J C}
abstractNote = {The development of rechargeable lithium batteries with a high mass capacity, made with non-toxic and low cost materials is an important industrial challenge. Morphological and structural modifications occurring in the electrode materials during charge-output cycles should not lower the electrochemical characteristics and the cycling properties of the battery. Thus the structure of electrode materials must be sufficiently deformable and stable to support the constraints linked with lithium intercalation and de-intercalation (ions and electrons absorption/extraction). The aim of this work is to explain some characteristics (mass capacity, ions and electrons mobility, cycling) using the relation between some mechanisms of lithium insertion (sites occupation, lattice reduction mods) and the nature of atoms and chemical bonds (covalence, ionicity). This approach is developed on 2-D models of crystallized and vitreous sulfur compounds (CdI{sub 2} type) with a large inter-sheet distance, and on 3-D spinel models with a huge number of vacant sites. The method is based on a correlation between experimental studies (XAFS, DX, Moessbauer, XPS) and theoretical calculations and on the electronic and electrochemical characteristics. The model proposed should allow to improve materials in a predictive way (type of substitution) or to imagine new materials. (J.S.) 15 refs.}
place = {France}
year = {1996}
month = {Dec}
}
title = {A fundamental approach to better understand the lithium insertion mechanisms in electrode materials; Une approche fondamentale pour mieux comprendre les mecanismes d`insertion du lithium dans les materiaux d`electrodes}
author = {Olivier-Fourcade, J, Branci, C, Sarradin, J, and Jumas, J C}
abstractNote = {The development of rechargeable lithium batteries with a high mass capacity, made with non-toxic and low cost materials is an important industrial challenge. Morphological and structural modifications occurring in the electrode materials during charge-output cycles should not lower the electrochemical characteristics and the cycling properties of the battery. Thus the structure of electrode materials must be sufficiently deformable and stable to support the constraints linked with lithium intercalation and de-intercalation (ions and electrons absorption/extraction). The aim of this work is to explain some characteristics (mass capacity, ions and electrons mobility, cycling) using the relation between some mechanisms of lithium insertion (sites occupation, lattice reduction mods) and the nature of atoms and chemical bonds (covalence, ionicity). This approach is developed on 2-D models of crystallized and vitreous sulfur compounds (CdI{sub 2} type) with a large inter-sheet distance, and on 3-D spinel models with a huge number of vacant sites. The method is based on a correlation between experimental studies (XAFS, DX, Moessbauer, XPS) and theoretical calculations and on the electronic and electrochemical characteristics. The model proposed should allow to improve materials in a predictive way (type of substitution) or to imagine new materials. (J.S.) 15 refs.}
place = {France}
year = {1996}
month = {Dec}
}