| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10267316 | Electrochemistry Communications | 2005 | 6 Pages |
Abstract
The reduction of graphite in propylene carbonate (PC) based electrolytes is a complex process involving solvated lithium-graphite intercalation compounds (GICs), Li+(PC)yCn-. XRD performed in situ to cyclic voltammetry allows to monitor the intercalation/de-intercalation of PC-solvated lithium into/from a crystalline graphite electrode, which is associated with up to 374% expansion of the basal plane spacing in c-direction of the graphite structure. The XRD data further allows to estimate the structure and stoichiometry of the ternary GIC: Li+(PC)yCn-, with y ⩾ 4, indicating a 3-dimensional, tetrahedral solvate shell. The stability of ternary GICs vs. reduction is addressed in view of graphite exfoliation and electrode failure.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
M.R. Wagner, J.H. Albering, K.-C. Moeller, J.O. Besenhard, M. Winter,