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|
| Type |
Poster Presentation |
| Area |
Electrochemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
ELEC.P-614 |
| Subject |
Storage of divalent alkali ion in carbonaceous host for secondary battery applications |
| Authors |
Prabakar Richard, myoungho pyo*
Department of Printed Electronics Engineering, Suncheon National University, Korea
|
| Abstract |
Insertion of guest species in carbon based host such as graphite or hard carbon remain to be the topic of continued interest as it attracts a broad spectrum of applications especially centered towards energy storage and liquid purification. The versatility of graphite allows simultaneous insertion of more than one type of guest species in the host structure through a co-intercalation phenomenon. We for the first time demonstrate the successful electrochemical intercalation of calcium in host graphite with appreciable reversible capacity through a co-intercalation phenomenon. In contrast to the simple intercalation forming binary graphite intercalation compounds (GIC’s) such as LiC6 or KC8, the intercalation was achieved by the careful choice of an electrolyte salt and a suitable solvent that can form a solvate ionic liquid type complex. The co-intercalation in graphite proceeds via a stepwise staging and was quantified successfully by X-ray diffraction (XRD), thermogravimetry analysis (TGA), X-ray Spectroscopy (XPS) and dilatometer measurements. A reversible stable capacity approaching 80 mAhg-1 was achieved for 50 C/D cycles, suggesting that the staging proceeds close to stage-1. Our results will lead to further advancement of ternary GICs as potential anode materials for calcium ion batteries. |
| E-mail |
richiechem@gmail.com |
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121st General Meeting of the KCS