Electrochemical Properties of Li4Ti5O12 as a Negative Electrode for Calcium Secondary Batteries in Ca(TFSI)2/THF Electrolyte

Publisher: Trans Tech Publications

E-ISSN: 1662-9795|2016|724|97-101

ISSN: 1013-9826

Source: Key Engineering Materials, Vol.2016, Iss.724, 2017-02, pp. : 97-101

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Abstract

We investigated the electrochemical behavior and properties of lithium titanate oxide as the negative electrode for calcium ion batteries during charge/discharge tests in tetrahydrofuran (THF)-based electrolyte. The reversible charge and discharge capacities of ~150 and ~145 mAh g–1 were observed, respectively, in THF-based electrolyte. They are larger than those obtained in propylene carbonate-based electrolyte. Moreover, interesting charge/discharge curves were observed, which might be attributed to structural changes during the insertion/extraction of calcium ions. These results were confirmed by the charge/discharge curves and scanning electron microscopy images.