A Two-Dimensional Metal-Organic Polymer Enabled by Robust Nickel-Nitrogen and Hydrogen Bonds for Exceptional Sodium-Ion Storage.,Angewandte Chemie International Edition

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A Two-Dimensional Metal-Organic Polymer Enabled by Robust Nickel-Nitrogen and Hydrogen Bonds for Exceptional Sodium-Ion Storage.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-08-18 , DOI: 10.1002/anie.202008726
Liubin Wang ₁ , Youxuan Ni ₁ , Xuesen Hou ₁ , Li Chen ₂ , Fujun Li ₁ , Jun Chen ₁

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Organic electrode materials suffer from low electronic conductivity and poor structure stability. Herein, a metal–organic polymer, Ni‐coordinated tetramino‐benzoquinone (Ni‐TABQ), is synthesized via d–π hybridization. The polymer chains are stitched by hydrogen bonds to feature as a robust two‐dimensional (2D) layered structure. It offers both electron conduction and Na⁺ diffusion pathways along the directions of the polymer chains and the hydrogen bonds. With both the conjugated benzoid carbonyls and imines as the redox centers for the insertion and extraction of Na⁺, the Ni‐TABQ delivers high capacities of about 469.5 mAh g⁻¹ at 100 mA g⁻¹ and 345.4 mAh g⁻¹ at 8 A g⁻¹. The large capacities are sustained for 100 cycles with almost 100 % coulombic efficiencies. The exceptional electrochemical performance is attributed to the unique 2D electron conduction and Na⁺ diffusion pathways enabled by the robust Ni–N and hydrogen bonds.

中文翻译：

二维金属有机聚合物，通过坚固的镍-氮和氢键实现出色的钠离子存储。

有机电极材料具有较低的电子电导率和较差的结构稳定性。在此，通过d-π杂交合成了一种金属有机聚合物，即Ni配位的四氨基苯并醌（Ni-TABQ）。聚合物链通过氢键缝合，形成坚固的二维（2D）分层结构。它沿着聚合物链和氢键的方向提供电子传导和Na ⁺扩散途径。以共轭苯甲酰羰基和亚胺作为Na ⁺的插入和提取的氧化还原中心，Ni-TABQ在100 mA g ^-1下提供约469.5 mAh g ^-1的高容量，在8 A时提供345.4 mAh g ^-1的高容量g ^-1。大容量可维持100个循环，而库仑效率几乎达到100％。优异的电化学性能归因于独特的2D电子传导和Na ⁺扩散路径，这些路径由坚固的Ni–N和氢键实现。

更新日期：2020-08-18

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