| Title | Long-term structural stability of PMMA-based gel polymer electrolytes |
|---|---|
| Publication Type | Articolo su Rivista peer-reviewed |
| Year of Publication | 1998 |
| Authors | Quartarone, E., Tomasi C., Mustarelli P., Appetecchi Giovanni Battista, and Croce F. |
| Journal | Electrochimica Acta |
| Volume | 43 |
| Pagination | 1435-1439 |
| ISSN | 00134686 |
| Keywords | Annealing, Crystal growth, Crystal structure, Dimethyl carbonate, Electric conductivity of solids, Electrochemical electrodes, Ethylene carbonate, Gel electrolytes, Gels, Lithium batteries, Lithium compounds, Lithium triflate, Polyelectrolytes, Polymethyl methacrylates, Reaction kinetics, Structural stability |
| Abstract | Gel-based SPEs are promising candidates as polymer electrolytes in electrochemical devices such as Li-ion batteries. In particular, PMMA-based gel electrolytes have shown electrical conductivity at room temperature as high as 10-3 Scm-1. One of the most important drawbacks of these gels is their lack of long-term structural stability, which determines a reduction of the contact area with the electrode and causes drops in conductance. We have observed macroscopic volume reductions (> 5%) in gels made of PMMA, ethylene carbonate (EC), dimethyl carbonate (DMC) and LiN(CF3SO2)2. The timescale of this phenomenon depends on the ratio EC/DMC. In this paper we investigate the structural modifications induced in the above mentioned system by annealing for several months at room temperature. We show that a crystalline phase grows in a matter of weeks with a kinetics controlled by the ratio EC/DMC and disappears for longer annealings. © 1998 Published by Elsevier Science Ltd. All rights reserved. |
| Notes | cited By 38 |
| URL | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032310525&partnerID=40&md5=c8fa6c9d5d14a5b0684c794f8110a555 |
| Citation Key | Quartarone19981435 |
