New Route toward POM[6]Catenane Members for Lithium-Ion Batteries

作者：Sha, Jing-Quan^*; Li, Meng-Ting; Yang, Xi-Ya; Sheng, Ning; Li, Ji-Sen; Zhu, Meng-Liang; Liu, Guo-Dong; Jiang, Jianzhuang^*

来源：Crystal Growth & Design, 2017, 17(7): 3775-3782.

DOI：10.1021/acs.cgd.7b00373

• METAL-ORGANIC FRAMEWORK
• WALLED CARBON NANOTUBES
• ANODE MATERIALS
• POLYOXOMETALATE
• CATALYSTS
• CLUSTERS
• KEGGIN
• FUNCTIONALIZATION
• INTERCALATION
• COMPLEXES

A new general route was developed for the synthesis of polyoxometalate (POM)-based [6]catenane frameworks. The hydrothermal reaction of 1,2,4-triazole and AgNO3 with the saturated Keggin polyoxoanions [Si-W-O-40](4-)/ [PMo12O40](3-)/[ASW(12) O-40](3-) as a template led to the successful isolation of POM[n]catenane members [Ag(trz)]-[Ag-12(trz)(9)][HSiW12O40]-2H(2)O (1), [Ag(trz)][Ag-12(trz)(9)][PMo12O40]center dot 2H(2)O (2), and [Ag(trz)] [Ag12(trz)9] [AsW12O40]. 2H20 (3). Single crystal X-ray diffraction analysis not only clearly reveals their [6]catenane nature but also discloses their regular three-dimensional infinite polycatenated structure with a self -dual NaCl-type topology. And for the first time, POM[6]catenane (1 and 2) are used as anode materials in lithium -ion batteries, which exhibit promising electrochemical performance with the first discharge capacities of 1182 mAh g(-1) for 1 and 1355 mAh g(-1.) for 2, and stabilized discharge capacity of 330 mAh g(-1) for 1 and 520 mAh g(-1) for 2 after 100 cycles at the current density of 0.5 A g(-1).

• 出版日期2017-7
• 单位济宁学院; 东北师范大学; 北京科技大学; 山东大学