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| Type |
Poster Presentation |
| Area |
Electrochemistry |
| Room No. |
Grand Ballroom |
| Time |
10월 19일 (금요일) 11:00~12:30 |
| Code |
ELEC.P-481 |
| Subject |
Electrochemical and spectroscopic investigations of calcium alloying/ de-alloying with tin for calcium ion battery |
| Authors |
Amol Bhairuba Ikhe, Myoungho Pyo*
Department of Printed Electronics Engineering, Suncheon National University, Korea
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| Abstract |
Recently, rechargeable calcium ion batteries (CIB) have gained increasing attention as a promising battery systems alternative to lithium-based batteries for grid-scale energy storage. Ca, as an anode material which inherently possesses a number of merits over the alkali metals such as lithium/potassium is safe to use without dendritic growth (like magnesium), high crustal abundant, low cost, and high gravimetric capacity (1340 mAhg-1). In addition, the Ca has a higher reduction potential (-2.87 vs. NHE), which is close to that of alkali metals such as Li and K. The high redox potential and dendrite free nature of Ca are amenable for assembling high voltage and high energy density batteries with suitable cathode materials. However, the passivating behaviors of the Ca in carbonate type electrolytes are similar to that of magnesium, rendering it unsuitable as an anode in CIBs. Alloying of Ca with suitable metals are a promising alternative and previous reports employing this strategy fail to focus on the mechanism of Ca storage at the anode. Herein, we demonstrate the Ca electrochemical alloying/de-alloying with Sn anode for CIB using electrochemical and spectroscopic techniques. In our investigation, we found that the first step of Ca alloying can occur at ca. -1.4 V (vs. NHE). Furthermore, the alloying/de-alloying was confirmed by the XPS, FE-SEM, and EDX mapping. Detailed electrochemical and spectroscopic investigations of the Ca alloying/de-alloying mechanism are underway. |
| E-mail |
ikheamol@gmail.com |
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122nd General Meeting of the KCS