MnO2@MoS2/RGO hollow structure as high-performance supercapacitor electrode materials

• Published in: Journal of energy storage Vol. 64; p. 107216
• Main Authors: Ran, Jing, Liu, Yafei, Yang, Tiantian, Feng, Huixia, Zhan, Huiying, Shi, Haixiong
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.08.2023
• Subjects: Electrode material; Graphene; Hollow structure; Manganese dioxide; Molybdenum disulfide; Supercapacitor; Hollow structure; Manganese dioxide; Supercapacitor; Molybdenum disulfide; Electrode material; Graphene
• ISSN: 2352-152X; 2352-1538
• DOI: 10.1016/j.est.2023.107216

Reduced graphene (RGO) has garnered substantial attention due to its specific surface area and electrical conductivity as a material for cathodes. However, RGO cannot meet the demand for new energy because of its low capacitance, which has the problem of RGO lamellar agglomeration. Herein, MnO2@MoS2/RGO electrode material composite is prepared by using MoS2/RGO as the conductive substrate and MnO2 as the active substance particles. Electrochemical performance tests showed that the MnO2@MoS2/RGO composite electrode has excellent specific capacitance and stable cyclic stability. The prepared nanocomposite material has a capacitance of 743 F g−1 of 1 A g−1, which is greater than that of MnO2 (102 F g−1). Specific energy and specific power were 31.22 Whkg−1 and 362.51 Wkg−1 of the MnO2@MoS2/RGO material. The cycle stability reaches 88.5 % after 5000 cycles. Due to its excellent electrochemical properties, it has become a hot subject in the research of materials for supercapacitor electrodes. [Display omitted] •The unique structure, MoS2, and RGO were restructured, to solve the agglomeration problem.•Hollow MnO2 nanospheres were synthesized by hydrothermal method on MoS2/RGO substrate.•The type of recombination mechanism was proposed to synthesize MnO2@MoS2/RGO electrode material.•Eelectrochemical properties, the capacitance of the prepared nanocomposite material is 743 F g−1 at 1 A g−1.