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首页> 外文期刊>ACS applied materials & interfaces >Cl-/SO32--Codoped Poly(3,4-ethylenedioxythiophene) That Interpenetrates and Encapsulates Porous Fe2O3 To Form Composite Nanoframeworks for Stable Lithium-Ion Batteries
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Cl-/SO32--Codoped Poly(3,4-ethylenedioxythiophene) That Interpenetrates and Encapsulates Porous Fe2O3 To Form Composite Nanoframeworks for Stable Lithium-Ion Batteries

机译：CL- / SO32 - 编排的聚（3,4-乙二氧基噻吩），其渗流并包封多孔Fe2O3以形成稳定的锂离子电池的复合纳米摩擦作业

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摘要

Penetrating into the inner surface of porous metal-oxide nanostructures to encapsulate the conductive layer is an efficient but challenging route to exploit high-performance lithium-ion battery electrodes. Furthermore, if the bonding force on the interface between the core and shell was enhanced, the structure and cyclic performance of the electrodes will be greatly improved. Here, vertically aligned interpenetrating encapsulation composite nanoframeworks were assembled from Cl-/SO32--codoped poly(3,4-ethylenedioxythiophene) (PEDOT) that interpenetrated and coated on porous Fe2O3 nanoframeworks (PEDOT-IE-Fe2O3) via a one-step Fe3+-induced in situ growth strategy. Compared with conventional wrapped structures and methods, the special PEDOT-IE-Fe2O3 encapsulation structure has many advantages. First, the codoped PEDOT shell ensures a high conductive network in the composites (100.6 S cm(-1)) and provides interpenetrating fast ion/electron transport pathways on the inner and outer surface of a single composite unit. Additionally, the pores inside offer void space to buffer the volume expansion of the nanoscale frameworks in cycling processes. In particular, the formation of Fe-S bonds on the organic-inorganic interface (between PEDOT shell and Fe2O3 core) enhances the structural stability and further extends the cell cycle life. The PEDOT-IE- Fe2O3 was applied as lithium-ion battery anodes, which exhibit excellent lithium storage capability and cycling stability. The capacity was as high as 1096 mA h g(-1) at 0.05 A g(-1), excellent rate capability, and a long and stable cycle process with a capacity retention of 89% (791 mA h g(-1)) after 1000 cycles (2 A g(-1)). We demonstrate a novel interpenetrating encapsulation structure to highly enhance the electrochemical performance of metal-oxide nanostructures, especially the cycling stability, and provide new insights for designing electrochemical energy storage materials.
机译：渗透到多孔金属氧化物纳米结构中以包封导电层是利用高性能锂离子电池电极的有效但具有挑战性的路线。此外，如果增强了芯和壳之间的界面上的接合力，则电极的结构和循环性能将大大提高。这里，垂直对齐的渗透封装复合纳米rameworks由Cl-/ So32 - 编排的聚（3,4-亚乙二氧基噻吩）（PEDOT）组装在多孔Fe 2 O 3纳米rameworks（PEDOT-IE-FE2O3）上渗透并涂覆在多孔Fe3 +上 - 原位生长策略引起。与传统的包装结构和方法相比，特殊的PEDOT-IE-FE2O3封装结构具有许多优点。首先，编码的佩特壳确保了复合材料中的高导电网络（100.6 s cm（-1）），并在单个复合单元的内表面和外表面上提供互通的快电离离子/电子传输通路。另外，内部的孔提供空隙空间以缓冲循环过程中纳米级框架的体积膨胀。特别地，在有机 - 无机界面上形成Fe-S键（PEDOT壳和Fe 2 O 3核心之间）增强了结构稳定性，并进一步延伸了细胞循环寿命。将PEDOT-IE-FE2O3施加为锂离子电池阳极，其表现出优异的锂储存能力和循环稳定性。该容量高达1096 mA Hg（-1），0.05Ag（-1），优异的速率能力，且稳定的循环过程，容量保持89％（791 mA Hg（-1）） 1000个循环（2 a g（-1））。我们证明了一种新型的互进的封装结构，以高度增强金属氧化物纳米结构的电化学性能，尤其是循环稳定性，并为设计电化学储能材料提供新的见解。

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  • 来源
    《ACS applied materials & interfaces》 |2019年第34期|共9页
  • 作者

    Yang Qiao; Wu Xuhao; Huang Xuankai; Liao Shuang; Liang Kaijie; Yu Xueang; Li Kuan; Zhi Chunyi; Zhang Haiyan; Li Na;

  • 作者单位

    Guangdong Univ Technol Sch Mat &

    Energy Guangzhou 510006 Guangdong Peoples R China;

    Guangdong Univ Technol Sch Mat &

    Energy Guangzhou 510006 Guangdong Peoples R China;

    Guangdong Univ Technol Sch Mat &

    Energy Guangzhou 510006 Guangdong Peoples R China;

    Foshan Univ Sch Mat Sci &

    Energy Engn Foshan 528000 Peoples R China;

    Guangdong Univ Technol Sch Mat &

    Energy Guangzhou 510006 Guangdong Peoples R China;

    Guangdong Univ Technol Sch Mat &

    Energy Guangzhou 510006 Guangdong Peoples R China;

    Guangdong Univ Technol Sch Mat &

    Energy Guangzhou 510006 Guangdong Peoples R China;

    City Univ Hong Kong Dept Mat Sci &

    Engn Kowloon 83 Tat Chee Ave Hong Kong 999077 Peoples R China;

    Guangdong Univ Technol Sch Mat &

    Energy Guangzhou 510006 Guangdong Peoples R China;

    Guangdong Univ Technol Sch Mat &

    Energy Guangzhou 510006 Guangdong Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    interpenetrating encapsulation; PEDOT; porous Fe2O3; organic-inorganic interface; lithium-ion battery;

    机译：互穿封装;PEDOT;多孔Fe2O3;有机 - 无机界面;锂离子电池;

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