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Rationally Engineered Electrodes for a High-Performance Solid-State Cable-Type Supercapacitor

机译：合理设计的电极，用于高性能固态电缆型超级电容器

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摘要

Wire-shaped electrodes for solid-state cable-type supercapacitors (SSCTS) with high device capacitance and ultrahigh rate capability are prepared by depositing poly(3,4-ethylenedioxythiophene) onto self-doped TiO2 nanotubes (D-TiO2) aligned on Ti wire via a well-controlled electrochemical process. The large surface area, short ion diffusion path, and high electrical conductivity of these rationally engineered electrodes all contribute to the energy storage performance of SSCTS. The cyclic voltammetric studies show the good energy storage ability of the SSCTS even at an ultrahigh scan rate of 1000 V s(-1), which reveals the excellent instantaneous power characteristics of the device. The capacitance of 1.1 V SSCTS obtained from the charge-discharge measurements is 208.36 mu F cm(-1) at a discharge current of 100 mu A cm(-1) and 152.36 mu F cm(-1) at a discharge current of 2000 mu A cm(-1), respectively, indicating the ultrahigh rate capability. Furthermore, the SSCTS shows superior cyclic stability during long-term (20 000 cycles) cycling, and also maintains excellent performance when it is subjected to bending and succeeding straightening process.
机译：通过将聚（3,4-乙撑二氧噻吩）沉积到在Ti线上排列的自掺杂TiO2纳米管（D-TiO2）上，制备具有高器件电容和超高倍率性能的用于固态电缆型超级电容器（SSCTS）的线形电极通过良好控制的电化学过程。这些合理设计的电极的大表面积，短离子扩散路径和高电导率都有助于SSCTS的储能性能。循环伏安研究表明，即使在1000 V s（-1）的超高扫描速率下，SSCTS仍具有良好的能量存储能力，这揭示了该器件出色的瞬时功率特性。从充放电测量中获得的1.1 V SSCTS的电容在100μAcm（-1）的放电电流下为208.36μFcm（-1），在2000μm的放电电流下为152.36μFcm（-1） μA cm（-1）分别表示超高速率能力。此外，SSCTS在长期（20,000次循环）循环中显示出优异的循环稳定性，并且在经受弯曲和后续的矫直过程后仍保持出色的性能。

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  • 来源
    《Advanced Functional Materials》 |2017年第18期|1606696.1-1606696.7|共7页
  • 作者

    Vellacheri Ranjith; Zhao Huaping; Muehlstaedt Mike; Al-Haddad Ahmed; Jandt Klaus D.; Lei Yong;

  • 作者单位

    Ilmenau Univ Technol, Inst Phys, D-98693 Ilmenau, Germany|Ilmenau Univ Technol, IMN Macronano, D-98693 Ilmenau, Germany;

    Ilmenau Univ Technol, Inst Phys, D-98693 Ilmenau, Germany|Ilmenau Univ Technol, IMN Macronano, D-98693 Ilmenau, Germany;

    Friedrich Schiller Univ Jena, Otto Schott Inst Mat Res, Chair Mat Sci, D-07743 Jena, Germany;

    Ilmenau Univ Technol, Inst Phys, D-98693 Ilmenau, Germany|Ilmenau Univ Technol, IMN Macronano, D-98693 Ilmenau, Germany;

    Friedrich Schiller Univ Jena, Otto Schott Inst Mat Res, Chair Mat Sci, D-07743 Jena, Germany;

    Ilmenau Univ Technol, Inst Phys, D-98693 Ilmenau, Germany|Ilmenau Univ Technol, IMN Macronano, D-98693 Ilmenau, Germany;

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