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首页> 外文期刊>Advanced energy materials >Exfoliated Triazine-Based Covalent Organic Nanosheets with Multielectron Redox for High-Performance Lithium Organic Batteries
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Exfoliated Triazine-Based Covalent Organic Nanosheets with Multielectron Redox for High-Performance Lithium Organic Batteries

机译：用于高性能锂电池的多电元氧化还原，exfoliated基于三嗪的共价有机纳米片

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摘要

The development of the next-generation lithium ion battery requires environmental-friendly electrode materials with long cycle life and high energy density. Organic compounds are a promising potential source of electrode materials for lithium ion batteries due to their advantages of chemical richness at the molecular level, cost benefit, and environmental friendliness, but they suffer from low capacity and dissatisfactory cycle life mainly due to hydrophobic dissolution in organic electrolytes and poor electronic conductivity. In this work, two types of triazine-based covalent organic nanosheets (CONs) are exfoliated and composited with carbon nanotubes. The thin-layered 2D structure for the exfoliated CONs can activate more functional groups for lithium storage and boost the utilization efficiency of redox sites compared to its bulk counterpart. Large reversible capacities of above 1000 mAh g(-1) can be achieved after 250 cycles, which is comparable to high-capacity inorganic electrodes. Moreover, the lithium-storage mechanism is determined to be an intriguing 11 and 16 electron redox reaction, associated with the organic groups (unusual triazine ring, piperazine ring, and benzene ring, and common C(sic)N, Symbol of the Klingon Empire NH Symbol of the Klingon Empire groups).
机译：下一代锂离子电池的开发需要具有长循环寿命和高能量密度的环保电极材料。有机化合物是锂离子电池的有希望的电极材料来源，因为它们的分子水平，成本效益和环境友好的优点，但它们患有低容量和不满的循环寿命，主要是由于有机疏水溶解电解质和差的电子电导率。在这项工作中，用碳纳米管剥离两种类型的三嗪类共价有机纳米片（CIRS）。用于剥离缺点的薄层2D结构可以激活锂储存的更多官能团，并与其散装对应物相比增强氧化还原位点的利用效率。在250次循环之后，可以实现高于1000mAhg（-1）的较大可逆容量，其与高容量无机电极相当。此外，确定锂储存机制是与有机基团相关的有趣11和16电子氧化还原反应（不寻常的三嗪环，哌嗪环和苯环，以及Klingon Empire的符号的常见C（SiC）n Klingon Empire组的NH象征）。

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  • 来源
    《Advanced energy materials》 |2019年第3期|1801010.1-1801010.13|共13页
  • 作者

    Lei Zhendong; Chen Xiudong; Sun Weiwei; Zhang Yong; Wang Yong;

  • 作者单位

    Shanghai Univ Dept Chem Engn Sch Environm & Chem Engn 99 Shangda Rd Shanghai 200444 Peoples R China|Natl Univ Singapore NUS Grad Sch Integrat Sci & Engn Singapore 117583 Singapore;

    Shanghai Univ Dept Chem Engn Sch Environm & Chem Engn 99 Shangda Rd Shanghai 200444 Peoples R China|Qiannan Normal Coll Nationalities Sch Chem & Chem Engn Duyun 558000 Guizhou Peoples R China;

    Shanghai Univ Dept Chem Engn Sch Environm & Chem Engn 99 Shangda Rd Shanghai 200444 Peoples R China|Univ Wollongong Inst Superconducting & Elect Mat North Wollongong NSW 2500 Australia;

    Natl Univ Singapore NUS Grad Sch Integrat Sci & Engn Singapore 117583 Singapore;

    Shanghai Univ Dept Chem Engn Sch Environm & Chem Engn 99 Shangda Rd Shanghai 200444 Peoples R China|Univ Wollongong Inst Superconducting & Elect Mat North Wollongong NSW 2500 Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    covalent-organic nanosheets; exfoliation; lithium-storage mechanism; organic electrodes;

    机译：共价 - 有机纳米片;剥离;锂储存机制;有机电极;

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