A novel Sn-based coordination polymer with high-efficiency and ultrafast lithium storage  

作　　者：Xinlu Zhang Lu Han Junfeng Li Ting Lu Jinliang Li Guang Zhu Likun Pan 

机构地区：[1]Shanghai Key Laboratory of Magnetic Resonance,School of Physics and Electronic Science,East China Normal University,Shanghai 200241,China [2]Siyuan Laboratory,Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials,Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials,Department of Physics,Jinan University,Guangzhou,Guangdong 510632,China [3]Key Laboratory of SpinElectron and Nanomaterials of Anhui Higher Education Institutes,Suzhou University,Suzhou 234000,China

出　　处：《Journal of Materials Science & Technology》2022年第2期156-164,共9页材料科学技术（英文版）

基　　金：financially supported by National Natural Science Foundation of China(51702056);Fundamental Research Funds for the Central Universities(2162140621617330);Science and Technology Program of Guangzhou(202102020737,201605030008);Provincial Natural Science Foundation of Anhui(1908085ME120);Primary Research and Development Program of Anhui Province(201904a05020087)。

摘　　要：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 m A h g^(-1) at 0.1 A g^(-1) after 100 cycles and impressive rate storage capability of 287.7 m A h g^(-1)at 20 A g^(-1).More importantly,a robust cycling performance of 205.5 m A h g^(-1) at an extra-high current density of 20 A g^(-1) are observed without remarkable capacity-fading up to1000 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.

关 键 词：Sn-based coordination polymer High electrical conductivity Li-ion batteries ANODE Lithium storage mechanism 

分 类 号：O641.4[理学—物理化学] TM912[理学—化学]