期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 825, 期 -, 页码 51-56出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2018.08.008
关键词
Calcium-ion batteries; alpha-MoO3; New electrode material
资金
- Hibi Science Foundation (Japan)
- Japanese Ministry of Education, Culture, Sports, Science and Technology [24360109]
A layered structure of orthorhombic MoO3 (alpha-MoO3) was investigated as a new electrode material for calcium ion batteries in a Ca-based organic electrolyte. Ground alpha-MoO3 with a low reactivity carbon additive demonstrated a relatively high capacity of similar to 120 mAh/g per one-electron reaction even though a large irreversible capacity was obtained because of electrolyte decomposition during the 1st discharge (Ca2+ insertion). In addition, the X-ray diffraction (XRD) patterns after the 1st discharge and charge showed decreased intensities of the OkO reflections with increased peak widths in comparison with the XRD patterns of an as-prepared pellet, which suggests that structural damage occurs in the layered structures. However, the XRD patterns, energy dispersive X-ray (EDX) spectra and X-ray photoelectron spectra (XPS) of the discharged and discharged charged electrodes indicated that Ca2+ ions are inserted into and extracted from the crystal structures via a two-phase reaction.
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