期刊
NANO ENERGY
卷 79, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2020.105384
关键词
Aluminum-ion batteries; Channels-rich VS4; Ex-situ X-ray diffraction; In-situ Raman
类别
资金
- National Natural Science Foundation of China [51832004, 51521001]
- National Key Research and Development Program of China [2016YFA0202603]
- Program of Introducing Talents of Discipline to Universities [B17034]
- Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory [XHT2020-003]
Transition metal sulfides, as promising electrode materials for aluminum-ion batteries, have been hindered by their low energy density and poor rate property. This study successfully synthesized channels-rich VS4 nanowire clusters, demonstrating superior electrochemical performances as a cathode for rechargeable AIBs. The stable channels-rich structures of the VS4 nanowire clusters and proposed intercalation mechanism provide new insights into the chemistry of AIBs for electrochemical energy storage.
As promising electrode materials for aluminum-ion batteries (AIBs), transition metal sulfides have attracted significant attention. However, the relative low energy density and poor rate property restrict their further applications. Herein, channels-rich VS4 nanowire clusters were synthesized via an amine ions-assisted method. When assessed as a cathode for rechargeable AIB, the VS4 nanowire clusters exhibit superior electrochemical performances, specifically, outstanding rate property (103.32 mAh g(-1) at 800 mA g(-1)), good cycling stability and a high reversible capacity of 252.51 mAh g(-1) (at 100 mA g(-1)). Moreover, ex-situ X-ray diffraction (XRD) and in-situ Raman techniques reveal that the as-prepared VS4 nanowire clusters have stable channels-rich structures, which is favorable for the mass transfer in electrochemical reaction. A mechanism of intercalation is proposed for the electrochemical process. This work takes a step toward the development of high-performance electrode materials for AIBs and provides new insights into the chemistry of AIBs for electrochemical energy storage.
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