One-step hydrothermal synthesis of Co-MOF/Co3O4/rGO hybrid nanocomposite as high-performance anode of alkali metal-ion batteries

• Published in: Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2025-02, Vol.707, Article 135931
• Main Authors: Yin, Xiaojie, Yang, Fei, Mao, Wenlu, Mei, Yu, Qi, Jia-ao, Li, Ping, Li, Zhaowei, Jiang, Tao, Ding, Shuxin, Han, Yang
• Format: Article
• Language: English
• Subjects: Alkali metal-ion batteries; Anode; Energy storage mechanisms; Hybrid Nanocomposite; One-Step Hydrothermal Synthesis
• ISSN: 0927-7757
• DOI: 10.1016/j.colsurfa.2024.135931

Metal-organic frameworks (MOFs) frequently encounter issues such as inadequate conductivity and structural stability, constraining their utility in energy storage. Combining MOFs with other functional materials to form MOFs composites offers a promising approach to amalgamate advantages and address limitations. In this study, we developed a Co-MOF/Co3O4/rGO hybrid nanocomposite using a controlled one-step hydrothermal method. The pristine Co-MOF can be transformed into Co-MOF/Co3O4 by varying the amount of NaOH, and the final product Co-MOF/Co3O4/rGO can be obtained when reduced graphene oxide is added during the synthesis process. Due to the unique and synergistic structure consisting of Co-MOF, Co3O4, and rGO, Co-MOF/Co3O4/rGO exhibited excellent electrochemical performances. The Co-MOF/Co3O4/rGO composite demonstrated an initial charge capacity of 931 mAh g−1 when utilized as an anode in lithium-ion batteries at 100 mA g−1. Impressively, it maintained a reversible capacity of 1210 mAh g−1 even after 300 cycles, showcasing its excellent cycling stability. Furthermore, its applicability was extended to sodium-ion and potassium-ion batteries, where it exhibited reversible capacities of 343 mAh g−1 and 319 mAh g−1, respectively, at the same current density after 300 cycles. These results highlight the versatility and promising performance of the Co-MOF/Co3O4/rGO composite as an electrode material across various types of batteries. [Display omitted]