Flower-like MoSe2@N-doped carbon sub-nanoclusters regulated by MoO3 hexagonal prism as advanced anode for lithium-ion battery

Autor: Junjie Cai, Min Yonggang, Chen Miaoling, Liu Yidong, Liao Songyi, Wang Lingzhi, Xing-Wen Huang, Cao Jingru
Rok vydání: 2021
Předmět:
Zdroj: Journal of Alloys and Compounds. 865:158276
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2020.158276
Popis: Carbon-coated transition metal dihalide composite materials have shown favorable performance for lithium ion batteries. Herein, 3D flower-like MoSe2@N-doped carbon sub-nanocluster (MoSe2@NC SNCs) with uniform size ~500 nm was successfully synthesized using the pre-made MoO3 hexagonal prisms as the regulator, Se powder and PDA as raw materials through a simple self-assembly method followed by annealing treatment. The as-synthesized MoSe2@NC SNCs composite was characterized by XRD, XPS, SEM and TEM analyses. When fabricated into coin-cells with the counter of Li metal, the MoSe2@NC SNCs anode exhibited enhanced Li storage properties compared to the larger MoSe2@NC MPs electrode without MoO3 regulator, including better rate performance of 480 mA h/g at current density of 4.0 A/g and cycling stability of 501 mA h/g after 320 cycles at high current density of 2.0 A/g. Therefore, the MoSe2@NC SNCs composite may be one of the promising anode candidate materials for constructing LIBs. Furthermore, the strategy of controlling the size of MoSe2@N-doped carbon by adding its pre-treated transition metal oxides may also guide the controllable synthesis of other similar electrode materials.
Databáze: OpenAIRE