School of Chemistry and Chemical Engineering, Shandong University , Jinan 250100, China.
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University , Tianjin 300071, China.
ACS Appl Mater Interfaces. 2017 Mar 1;9(8):7160-7168. doi: 10.1021/acsami.6b15757. Epub 2017 Feb 16.
Two multifunctional metal-organic frameworks (MOFs) with the same coordination mode, [Co(L)(HO)]·2nHO [defined as "Co(L) MOF"] and [Cd(L)(HO)]·2nHO [defined as "Cd(L) MOF"] (L = 5-aminoisophthalic acid) have been fabricated via a simple and versatile scalable solvothermal approach at 85 °C for 24 h. The relationship between the structure of the electrode materials (especially the coordination water and different metal ions) and the electrochemical properties of MOFs have been investigated for the first time. And then the possible electrochemical mechanisms of the electrodes have been studied and proposed. In addition, MOFs/RGO hybrid materials were prepared via ball milling, which demonstrated better electrochemical performances than those of individual Co(L) MOF and Cd(L) MOF. For example, when Co(L) MOF/RGO was applied as anode for sodium ion batteries (SIBs), it retained 206 mA h g after 330 cycles at 500 mA g and 1185 mA h g could be obtained after 50 cycles at 100 mA g for lithium-ion batteries (LIBs). The high-discharge capacity, excellent cyclic stability combined with the facile synthesis procedure enable Co(L) MOF- and Cd(L) MOF-based materials to be prospective anode materials for SIBs and LIBs.
两种具有相同配位模式的多功能金属有机骨架（MOFs），[Co(L)(HO)]·2nHO（定义为“Co(L) MOF”）和[Cd(L)(HO)]·2nHO（定义为“Cd(L) MOF”）（L = 5-氨基间苯二甲酸），是通过在 85°C 下简单且通用的可扩展溶剂热方法在 24 小时内制备的。首次研究了电极材料的结构（特别是配位水和不同金属离子）与 MOFs 电化学性能之间的关系。然后研究并提出了电极的可能电化学机制。此外，通过球磨制备了 MOFs/RGO 杂化材料，其电化学性能优于单个 Co(L) MOF 和 Cd(L) MOF。例如，当 Co(L) MOF/RGO 用作钠离子电池（SIBs）的阳极时，在 500 mA g 的电流密度下经过 330 次循环后仍保持 206 mA h g-1 的放电容量，在 100 mA g 的电流密度下经过 50 次循环后仍保持 1185 mA h g-1 的放电容量。高放电容量、优异的循环稳定性以及简便的合成程序，使得 Co(L) MOF 和 Cd(L) MOF 基材料成为 SIBs 和 LIBs 的有前途的阳极材料。
