University of Wollongong
Browse

Heterostructured Mo2C–MoO2 as highly efficient catalyst for rechargeable Li–O2 battery

Download (2.01 MB)
journal contribution
posted on 2024-11-15, 15:05 authored by Chang Wu, Yuyang Hou, Jicheng Jiang, Haipeng Guo, Hua LiuHua Liu, Jun ChenJun Chen, Jiazhao WangJiazhao Wang
© 2020 Elsevier B.V. Li–O2 batteries has been widely investigated for its ultra-high capacity as next generation batteries. Nevertheless, some problems like sluggish kinetic reaction and instability hugely impede the practical use of Li–O2 batteries. In this work, Mo2C/MoO2@RGO heterostructures was fabricated by in-situ growth of Mo2C between MoO2 and RGO during calcination and being employed as cathode to explore the synergistic effect in Li–O2 batteries. As a result, Mo2C/MoO2@RGO exhibits good specific capacity with 2365 mAh g−1, high round-trip efficiency (89% at first cycle) and improved cycling performance. Density functional theory calculations indicated that the Mo2C/MoO2@RGO heterostructures have better capability of oxygen adsorption than sole constituent (Mo2C@RGO or MoO2@RGO), which triggers the formation of film-like amorphous discharge products, leading to lower overpotential and stable performance. Our study reveals the important role of heterostructures in Li–O2 batteries system and demonstrates a promising design strategy for heterostructured catalyst.

History

Citation

Wu, C., Hou, Y., Jiang, J., Guo, H., Liu, H., Chen, J. & Wang, J. (2020). Heterostructured Mo2C–MoO2 as highly efficient catalyst for rechargeable Li–O2 battery. Journal of Power Sources,

Journal title

Journal of Power Sources

Volume

470

Language

English

RIS ID

143391

Usage metrics

    Categories

    Keywords

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC