Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 163, Issue 13, Pages E351-E353Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0031614jes
Keywords
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Funding
- National Natural Science Foundation of China (NSFC) [51325102]
- International Science and Technology Cooperation Project of MOST, China [2015DFA90750]
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Germanium oxide (GeO2) was electrochemically reduced to Ge in molten CaCl2-NaCl at 600 degrees C, and the electrochemical behaviors of the electrolytic Ge were studied in the same electrolyte. From the cyclic voltammetry study, three alloying-dealloying processes were found to be related with electrochemical alloying of Ca2+ ions in the electrolytic Ge and stripping of Ca out from the Ca-Ge alloys. Galvanostatic charge-discharge technique was employed to study the specific capacity of electrolytic Ge for storing Ca, as well as the cyclability of the alloying-dealloying processes. At a charge-discharge rate of 2 A g(-1), the gravimetric capacity of the electrolytic Ge is 553 mAh g(-1). Overall, the results show that Ge is a promising material for Ca storage. (C) 2016 The Electrochemical Society. All rights reserved.
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