Flower-Like MoSe2/MoO2 Composite with High Capacity and Long-Term Stability for Lithium-Ion Battery

Qiuyan Hao; Guoliang Cui; Yan Zhao; Zhumabay Bakenov

doi:10.3390/nano9091256

Flower-Like MoSe₂/MoO₂ Composite with High Capacity and Long-Term Stability for Lithium-Ion Battery

Nanomaterials (Basel). 2019 Sep 5;9(9):1256. doi: 10.3390/nano9091256.

Authors

Qiuyan Hao¹, Guoliang Cui¹, Yan Zhao², Zhumabay Bakenov³

Affiliations

¹ School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China.
² School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China. yanzhao1984@hebut.edu.cn.
³ Institute of Batteries LLC, National Laboratory Astana, Nazarbayev University, 53 Kabanbay Batyr Avenue, Nur-Sultan 010000, Kazakhstan.

Abstract

A simple method is developed for the preparation of MoSe₂/MoO₂ composite with a flower-like structure for high-performance lithium-ion batteries (LIBs). MoSe₂ could lead to fast and facile movement of Li⁺ due to its larger interlayer spacing. Meanwhile, MoO₂ could protect the lamellar structure of MoSe₂ from being destroyed in the charging/discharging processes to maintain the required active surface to electrolytes. In addition, the flower-like structure of the composite could effectively alleviate the volume expansion during charging/discharging. As LIBs are anode material, MoSe₂/MoO₂ composite demonstrates an excellent specific discharge capacity of 1042 mAh g^-1 after 100 cycles at 0.1 A g^-1, which is attributed to the synergistic effects of MoSe₂ and MoO₂ in the composite.

Keywords: LIBs; MoSe2/MoO2 composite; anode; capacity; long-term cycle performance.

Abstract

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