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首页> 外文期刊>Crystal growth & design >Structure and LIBs Anode Material Application of Novel Wells-Dawson Polyoxometalate-Based Metal Organic Frameworks with Different Helical Channels
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Structure and LIBs Anode Material Application of Novel Wells-Dawson Polyoxometalate-Based Metal Organic Frameworks with Different Helical Channels

机译：具有不同螺旋通道的新型Wells-Dawson多氧化酯基金属有机框架的结构和Libs阳极材料应用

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摘要

Two new Wells-Dawson polyoxometalate-based metal-organic frameworks (POMOFs) with different helical channels were synthesized depending on the self-adaptive coordination nature of P2W18 polyanion. The hemispherical coordination of P2W18 clusters with Ag under the help of 1,2,4-triazole ligand induces the isolation of the twofold helical channels-containing POMOF 1, while the clockwise coordination of P2W18 clusters with Cu results in the fourfold helical channels-containing POMOF 2. Both compounds exhibit good electrochemical performance as lithium-ion batteries electrode materials due to their excellent redox properties and structural stabilization. The long-term cycling capacity as demonstrated by the still above 400-450 mA h g(-1) for 350 cycles at the current density of 100 mA g(-1 )reveals the important role of the helical channels within exposed P2W18 polyanions in 1 and 2, which allow the relatively easy Li+ deintercalation/intercalation. To illustrate the lithium storage, the impedance spectra of compound 2 during the first and 350th charge process was also studied for the first time.
机译：根据P2W18聚阳离子的自适应协调性质，合成了两个新的井 - 道森多氧化胍基金属 - 有机框架（POMOFS），其具有不同的螺旋通道。在1,2,4-三唑配体的帮助下，P2W18簇具有AG的半球形协调诱导含双螺旋通道的孔1的隔离，而P2W18簇的顺时针协调与Cu导致含有四倍螺旋通道的POMOF 2.由于其优异的氧化还原性能和结构稳定，两种化合物作为锂离子电池电极材料表现出良好的电化学性能。通过高于400-450 mA Hg（-1）所示的长期循环能力在100 mA g（-1）的电流密度下350次循环显示出螺旋通道在1中暴露的P2W18聚膜内的螺旋通道的重要作用和2，它允许相对容易的Li + Deidercalation /嵌入。为了说明锂储存，首次研究了第一和350℃充电过程中化合物2的阻抗光谱。

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  • 来源
    《Crystal growth & design》 |2018年第9期|共9页
  • 作者

    Yang Xi-Ya; Li Meng-Ting; Sheng Ning; Li Ji-Sen; Liu Guo-Dong; Sha Jing-Quan; Jiang Jianzhuang;

  • 作者单位

    Jining Univ Dept Chem &

    Chem Engn Key Lab Inorgan Chem Qufu 273155 Shandong Peoples R China;

    Qufu Normal Univ Sch Chem &

    Chem Engn Key Lab Life Organ Anal Qufu 273165 Shandong Peoples R China;

    Jining Univ Dept Chem &

    Chem Engn Key Lab Inorgan Chem Qufu 273155 Shandong Peoples R China;

    Jining Univ Dept Chem &

    Chem Engn Key Lab Inorgan Chem Qufu 273155 Shandong Peoples R China;

    Jining Univ Dept Chem &

    Chem Engn Key Lab Inorgan Chem Qufu 273155 Shandong Peoples R China;

    Jining Univ Dept Chem &

    Chem Engn Key Lab Inorgan Chem Qufu 273155 Shandong Peoples R China;

    Univ Sci &

    Technol Beijing Beijing Key Lab Sci &

    Applicat Funct Mol &

    Crysta Dept Chem Beijing 100083 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 晶体学;
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