2D Ti3C2 MXene embedded with Co(II)(OH)n nanoparticles as the cathode material for hybrid magnesium–lithium-ion batteries

• Published in: Journal of materials science Vol. 56; no. 3; pp. 2464 - 2473
• Main Authors: Li, Xiaohui, Tang, Yakun, Liu, Lang, Gao, Yang, Zhu, Caixia, NuLi, Yanna, Yang, Tongyu
• Format: Journal Article
• Language: English
• Published: New York Springer US 2021; Springer Nature B.V
• Subjects: Bonding strength; Cathodes; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Cobalt; Covalent bonds; Crystallography and Scattering Methods; Electrical resistivity; Electrochemical analysis; Electrode materials; Energy Materials; Energy storage; Interlayers; Lithium; Lithium batteries; Lithium-ion batteries; Magnesium; Materials Science; MXenes; Nanocomposites; Nanoparticles; Nickel; Polymer Sciences; Rechargeable batteries; Solid Mechanics; Synergistic effect; Ultrafines
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-020-05358-z

MXene, the 2D layered material, is intensively investigated for application in the energy storage field due to its multiple advantages of the high electrical conductivity, hydrophilicity and the plastic layer structure. Herein, a composite (M(II)(OH) n @Ti 3 C 2 ) of Ti 3 C 2 MXene matrices embedded with ultrafine M(II)(OH) n (M = Fe/Co/Ni) particles is in-situ prepared. M(II)(OH) n particles are tightly grown on the surface and between the interlayers of Ti 3 C 2 MXene by strong Ti–O–Co covalent bonds. Co(II)(OH) n @Ti 3 C 2 exhibits the remarkable performance in hybrid magnesium–lithium batteries (HMLBs) due to the redox capacitive contribution and “pillar effect” of Co(II)(OH) n particles between the interlayers of Ti 3 C 2 MXene. It exhibits a promising reversible capacity and excellent cycling stability. Its reversible capacity maintains 81.1 mAh g −1 after 600 cycles at 100 mA g −1 , and the coulombic efficiency is nearly 100%. Therefore, it is an effective strategy to enhance the electrochemical performance of HMLBs by increasing redox capacitance of MXene cathodes. Graphic abstract The Co(II)(OH) n nanoparticles decorated Ti 3 C 2 nanocomposite (M(II)(OH) n @Ti 3 C 2 ) was successfully synthesized by three processing steps. The Co(II)(OH) n @Ti 3 C 2 nanocomposite exhibits the superior performance in HMLBs due to the synergistic effect of the Co(II)(OH) n nanoparticles and the Ti 3 C 2 matrix.