Well-distributed 1T/2H MoS2 nanocrystals in the N-doped nanoporous carbon framework by direct pyrolysis

• Published in: Scientific reports 2023-05, Vol.13 (1), p.7492-7492, Article 7492
• Main Authors: Baheri, Yalda Tarpoudi, Maleki, Mahdi, Karimian, Hossein, Javadpoor, Jafar, Masoudpanah, Seyed Morteza
• Format: Article
• Language: English
• Subjects: 639/301; 639/4077; 639/925; Acrylonitrile; Carbon; Crystals; Electrical conductivity; Humanities and Social Sciences; Immunoglobulins; Lithium; Low temperature; Molybdenum; Molybdenum disulfide; multidisciplinary; Nanocrystals; Nanoparticles; Polymers; Pyrolysis; Raman spectroscopy; Science; Science (multidisciplinary)
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-023-34551-8

Molybdenum disulfide (MoS 2 ) has been a promising anode material in lithium-ion batteries (LIBs) because of its high theoretical capacity and large interlayer spacing. However, its intrinsic poor electrical conductivity and large volume changes during the lithiation/delithiation reactions limit its practical application. An efficient synthesis strategy was developed to prepare the MoS 2 nanocrystals well-anchored into the N-doped nanoporous carbon framework to deal with these challenges by a confined reaction space in an acrylonitrile-based porous polymer during the carbonization process. The prepared hybrid material comprises small 1T/2H-MoS 2 nanoparticles surrounded by a nanoporous carbon matrix. In addition to the highly crystalline nature of the synthesized MoS 2 , the low I D /I G of the Raman spectrum demonstrated the development of graphitic domains in the carbon support during low-temperature pyrolysis (700 °C). This novel three-dimensional (3D) hierarchical composite shows superior advantages, such as decreased diffusion lengths of lithium ions, preventing the agglomeration of MoS 2 nanocrystals, and maintaining the whole structural stability. The prepared C/MoS 2 hybrid demonstrated fast rate performance and satisfactory cycling stability as an anode material for LIBs.