期刊
JOURNAL OF POWER SOURCES ADVANCES
卷 10, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.powera.2021.100061
关键词
Molybdenum sulfides; Amorphous; Solid electrolytes; Sodium batteries; All-solidstate batteries
资金
- JSPS KAKENHI [20K05688, 20J23722, 19H05816]
- Grants-in-Aid for Scientific Research [20J23722, 20K05688] Funding Source: KAKEN
Two types of amorphous MoS3 were prepared as electrode active materials for all-solid-state sodium secondary batteries, showing high reversible capacities and suggesting promising potential for the development of such batteries.
All-solid-state Na-S secondary batteries that use sodium and sulfur, both available in abundance, are the most attractive next-generation batteries. In this study, two types of amorphous MoS3 (a-MoS3) were prepared as electrode active materials for use in all-solid-state sodium secondary batteries using the thermal decomposition (TD) of (NH4)(2) MoS4 and mechanochemical (MC) processes, denoted a-MoS3 (TD) and a-MoS3 (MC), respectively. X-ray diffraction, thermogravimetric-differential thermal analysis, and X-ray photoelectron spectroscopy (XPS) analyses revealed that a-MoS3 (TD) and a-MoS3 (MC) had different local structures. The a-MoS3 (TD) and a-MoS3 (MC) electrodes showed high reversible capacities of 310 mAh g(-1) and 260 mAh g(-1) , respectively, for five cycles in all-solid-state sodium secondary batteries. XPS analysis of the discharge-charge products suggested that the dissociation and formation of disulfide bonds occurred during the discharge-charge reaction. The results show that a-MoS3 is a promising active electrode material for all-solid-state sodium batteries.
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