A novel Sn-based coordination polymer with high-efficiency and ultrafast lithium storage. (20th January 2022)

• Record Type: Journal Article
• Authors: Zhang, Xinlu; Han, Lu; Li, Junfeng; Lu, Ting; Li, Jinliang; Zhu, Guang; Pan, Likun
• Is Part Of: Journal of materials science & technology. Volume 97(2022)
• Page Start: 156
• Page End: 164
• Publication Date: 2022-01-20
• Subjects: Sn-based coordination polymer -- High electrical conductivity -- Li-ion batteries -- Anode -- Lithium storage mechanism; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2021.04.045
• Languages: English
• ISSNs: 1005-0302

Abstract

Highlights: A Sn-based coordination polymer with high electrical conductivity was fabricated. The Sn-DHTPA was evaluated as an anode material for LIBs. High capacity, ultrafast Li storage and good cycling performance were achieved. The lithium storage mechanism was studied by a series of ex-situ characterizations. Abstract: Recently, Coordination Polymers (CPs) have been widely utilized as energy storage materials for reversible Lithium-Ion Batteries (LIBs) benefiting from their tunable building blocks and adjusted electrochemical properties. However, the unsatisfied electrochemical behavior of CPs with poor conductivity and sluggish ion transport kinetics is still a bottle-neck for their large-scale energy storage applications in LIBs. Herein, we display the rational fabrication of a conductive Sn-based coordination polymer (Sn-DHTPA) via judiciously choosing suitable building units. The Sn-DHTPA is employed as anode for LIBs, exhibiting superior reversible storage capacity of 1142.6 mA h g −1 at 0.1 A g −1 after 100 cycles and impressive rate storage capability of 287.7 mA h g −1 at 20 A g −1 . More importantly, a robust cycling performance of 205.5 mA h g −1 at an extra-high current density of 20 A g −1 are observed without remarkable capacity-fading up to 1000 cycles. The behavior superiority of Sn-DHTPA is related to its advanced architecture with abundant lithium storage sites, high electrical conductivity and rapid lithium transport. A series of ex-situ characterizations reveal that the impressive lithium storage capacity is contributed by the redox active sites of both the aromatic linker and metal center related to in-situ generated metallic nanoparticles dispersed in the skeleton. Graphical abstract: Image, graphical abstract