Stabilizing Redox-Active Hexaazatriphenylene in a 2D Conductive Metal–Organic Framework for Improved Lithium Storage Performance

Jiacheng Yin; Na Li; Ming LiuZhigang LiXuemin WangMingren ChengMing ZhongWei LiYunhua XuXian-He Bu

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Stabilizing Redox-Active Hexaazatriphenylene in a 2D Conductive Metal–Organic Framework for Improved Lithium Storage Performance

机译：Stabilizing Redox-Active Hexaazatriphenylene in a 2D Conductive Metal–Organic Framework for Improved Lithium Storage Performance

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Organic redox-active materials are promising electrode candidates for lithiumion batteries by virtue of their designable structure and cost-effectiveness. However, their poor electrical conductivity and high solubility in organic electrolytes limit the device’s performance and practical applications. Herein, the π-conjugated nitrogen-containing heteroaromatic molecule hexaazatriphenylene (HATN) is strategically embedded with redox-active centers in the skeleton of a Cu-based 2D conductive metal–organic framework (2D c-MOF) to optimize the lithium (Li) storage performance of organic electrodes, which delivers improved specific capacity (763 mAh g~(?1) at 300 mA g~(?1)), long-term cycling stability (≈90% capacity retention after 600 cycles at 300 mA g~(?1)), and excellent rate performance. The correlation of experimental and computational results confirms that this high Li storage performance derives from the maximum number of active sites (C=N sites in the HATN unit and C=O sites in the CuO_4 unit), favorable electrical conductivity, and efficient mass transfer channels. This strategy of integrating multiple redox-active moieties into the 2D c-MOF opens up a new avenue for the design of high-performance electrode materials.

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《Advanced functional materials》 |2023年第21期|2211950.1-2211950.9|共9页
作者
Jiacheng Yin; Na Li; Ming LiuZhigang LiXuemin WangMingren ChengMing ZhongWei LiYunhua XuXian-He Bu;
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School of Materials Science and Engineering National Institute for Advanced Materials TKL of Metal and Molecule Based Material Chemistry Nankai University Tianjin 300350, China;

School of Materials Science and Engineering National Institute for Advanced Materials TKL of Metal and Molecule Based Material Chemistry Nankai University Tianjin 300350, China,State Key Laboratory of Elemento-Organic Chemistry College of Chemistry Nankai;

School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology (MOE) Tianjin Key Laboratory of Composite and Functional Materials Tianjin University Tianjin 300072, China;

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conductive metal–organic frameworks; hexaazatriphenylene; lithium-ion batteries; redox-active sites;

Stabilizing Redox-Active Hexaazatriphenylene in a 2D Conductive Metal–Organic Framework for Improved Lithium Storage Performance

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