POMs-based metal-organic frameworks with interpenetrating structures and their carbon nanotube-coated materials for lithium-ion anode applications

• Published in: Journal of solid state chemistry Vol. 337; p. 124787
• Main Authors: Li, Meng-Ting, Zhou, Xiao-Han, Liang, Qiao-Ming, Chen, Jun, Sun, Jing-Wen, Yu, Yang, Wang, Ling-Yan
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.09.2024
• Subjects: Carbon nanotubes (CNTs); Lithium-ion batteries (LIBs); Polyoxometalates (POMs); POMOFs; Carbon nanotubes (CNTs); Lithium-ion batteries (LIBs); Polyoxometalates (POMs); POMOFs
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2024.124787

The inherent characteristics of abundant, stable, and swift electron transfer make polyoxometalates (POMs) exceptionally suitable for utilization in energy storage applications, particularly in Lithium-ion batteries (LIBs). By immobilizing POMs within metal-organic frameworks, Ag-BTBA-POM was synthesized to address the challenges associated with the low electronic conductivity and solubility of POMs. To enhance the electronic conductivity of POMOFs crystals further, CNT@Ag-BTBA-POM was developed. This carbon composite material exhibits exceptional cyclic stability and electrochemical characteristics, with the discharge specific capacity stabilizing at around 730 mA h g−1 over 100 cycles. A metal-organic framework constructed from polyoxometalates with an interpenetrating structure, along with its carbon nanotube-coated derivatives, showcasing remarkable lithium ion storage capabilities. [Display omitted] •POMOFs furnish a steadfast conduit for swift lithium ion migration, ensuring utmost structural integrity and stability.•By encapsulating POMOFs crystals with a carbon nanotube layer, the electronic conductivity of the material is improved.•CNT@Ag-BTBA-POM can mitigate the impact of a large amount of electrolyte infiltrating into the crystal lattice.