Facile construction of two-dimensional coordination polymers with a well-designed redox-active organic linker for improved lithium ion battery performance

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2019,（5）
• 页码范围: 602-608
• 页数: 7页
• 语种: 英文

摘要

A well-designed redox-active organic linker,pyrazine-2,3,5,6-tetracarboxylate (H4pztc) with brimming active sites for lithium ions storage was utilized to construct coordination polymers (CPs) via a facile hydrothermal reaction.Those two isostructural two-dimensional (2D) CPs,namely [M2(pztc)(H2O)6]n (M=Co for 1 and Ni for 2),delivered excellent reversible capacities and stable cycling performance as anodes in lithium ion batteries.As demonstrated in electrochemical studies,1 and 2 can achieve highly reversible capacities of 815 and 536 mA h g-1 at 200 mA g 1 for 150 cycles,respectively,best performed for the reported 2D-CP-based anode materials.The electrochemical mechanism studies showed that the remarkable performances can be ascribed to the synergistic Li-storage redox reactions of metal centers and organic moieties.Our work highlights the opportunities of using a well-designed organic ligand to construct low-dimensional CPs as new type of electrode materials for advanced lithium ion batteries.