Journal
CHEMISTRY OF MATERIALS
Volume 21, Issue 13, Pages 2632-2640Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm8033559
Keywords
-
Funding
- Japan Society for the Promotion of Science
- Japan Synchrotron Radiation Research Institute (JASRI) [2006A1663, 2007A3628]
Ask authors/readers for more resources
Surface and bulk structural changes in LiNi0.8Co0.2O2 were observed during electrochemical reactions using synchrotron X-ray scattering and a restricted reaction plane of two-dimensional (2D) epitaxial-film electrodes. The bulk structural changes confirmed lithium diffusion through the (110) surface, which is perpendicular to the 2D edges of the layered structure. No (de)intercalation reaction was observed through the (003) surface in the voltage range of 3.0-5.0 V. However, intercalation proceeded below 3.0 V, which indicates unusual three-dimensional lithium diffusion in the 2D structure in the overlithiated state. Structural changes at the electrode surface were different from those in the bulk. Contact with the liquid electrolyte caused all abrupt deformation of the surface crystal lattice, followed by restructuring upon applying a cell voltage. These slow reconstruction processes were dependent on the crystal lattice orientations. The reaction mechanism of the intercalation electrodes for lithium batteries is discussed oil the basis of the surface and bulk structural changes that occur during electrochemical reactions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available