Acidity Considerations in the Self-Assembly of POM/Ag/trz-Based Compounds with Efficient Electrochemical Activities in LIBs

作者：Sha, Jing-Quan^*; Li, Xiao; Li, Ji-Sen; Yang, Xi-Ya; Zhang, Hai-Feng; Yue, Ming-Bo^*; Zhou, Kunfeng

来源：Crystal Growth & Design, 2018, 18(4): 2289-2296.

DOI：10.1021/acs.cgd.7b01730

• METAL-ORGANIC FRAMEWORKS
• LITHIUM-ION BATTERIES
• POLYOXOMETALATE-BASED HYBRID
• COORDINATION POLYMERS
• CARBENE FRAMEWORKS
• PERFORMANCE
• ANODE
• PH
• CONSTRUCTION
• NANOTUBES

Controlled self-assembly of the inorganicorganic hybrid compounds based on polyoxometalates (POMs) is hampered by the wide range of oxo and hydroxo units on the peripheries of POMs and many chemical parameters. In this work, aiming to understand the pH value influence on the POM/Ag/trz assembly (trz = 1,2,3-triazole), two new hybrid compounds based on POMs combining with metalorganic frameworks (MOFs), H[Ag-27(trz)(16)(H2O)(4)][(AsW12O40)(2)] (1), and [Ag-15(trz)(8)][AsW12O40] (2), were isolated under different pH value. The structural analysis reveals that the [Ag-7(trz)(4)](3+) subunits and Keggin-type arsenotungstate are assembled into a complicated three-dimensional framework containing two distinct types of channels in compound 1. And the [Ag-5(trz)(4)](+) subunits and Keggin-type arsenotungstate are assembled into a three-dimensional framework containing the single channel under the aid of AgAg bonds in compound 2. In addition, compounds 1 and 2 were employed as anode materials of lithium-ion batteries (LIBs) and exhibited the promising electrochemical performances.

• 出版日期2018-4
• 单位济宁学院; 曲阜师范大学