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 judi-ciously 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 charac-terizations 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.
基金项目
国家自然科学基金(51702056)
中央高校基本科研业务费专项(2162140621617330)
广州市科技计划(202102020737)
广州市科技计划(201605030008)
Provincial Natural Science Foundation of Anhui(1908085ME120)
Primary Research and Development Program of Anhui Province(201904a05020087)
NETL
NSTL
维普
万方数据