Molecular‐Scale Hybridization of Clay Monolayers and Conducting Polymer for Thin‐Film Supercapacitors
Molecular‐Scale Hybridization of Clay Monolayers and Conducting Polymer for Thin‐Film Supercapacitors
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DOI：
10.1002/adfm.201500408
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发表时间：
2015-05
影响因子：
19
通讯作者：
Jingwen Zhao;Si-Min Xu;K. Tschulik;R. Compton;Min Wei;D. O′Hare;D. Evans;X. Duan
中科院分区：
文献类型：
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作者：
Jingwen Zhao;Si-Min Xu;K. Tschulik;R. Compton;Min Wei;D. O′Hare;D. Evans;X. Duan
具有明确结构的电极材料的开发是实现高效储能系统的富有成效和有利可图的方法。本文提出了一种分子尺度的杂化体系，该体系是基于CoNi -层状双氢氧化物（CoNi - LDH）单层自组装和导电聚合物（聚（3,4 -乙烯二氧噻吩）：聚（苯乙烯磺酸盐），标记为PEDOT:PSS）形成交替层超晶格。由于均匀的界面和密切的相互作用，得到的CoNi - LDH/PEDOT:PSS杂化材料同时增强了离子和电荷载流子的输运，并表现出改善的电容性能，具有高比电容（在2 a g-1时为960 F - 1）和优异的倍率能力（在30 a g-1时保持83.7%）。此外，基于CoNi - LDH/PEDOT:PSS薄膜，制造了一种具有跨数字设计的平面内超级电容器器件，提供了显著增强的能量和功率输出（11.9 kW kg-1时能量密度为46.1 Wh kg-1）。通过成功驱动光电探测器，进一步证明了其在小型化器件中的应用。这些特性表明，LDH单层和导电聚合物的分子尺度组装在小型化电子器件的能量存储和转换应用中是有前景的。
Development of electrode materials with well‐defined architectures is a fruitful and profitable approach for achieving highly‐efficient energy storage systems. A molecular‐scale hybrid system is presented based on the self‐assembly of CoNi‐layered double hydroxide (CoNi‐LDH) monolayers and the conducting polymer (poly(3,4‐ethylene dioxythiophene):poly(styrene sulfonate), denoted as PEDOT:PSS) into an alternating‐layer superlattice. Owing to the homogeneous interface and intimate interaction, the resulting CoNi‐LDH/PEDOT:PSS hybrid materials possess a simultaneous enhancement in ion and charge‐carrier transport and exhibit improved capacitive properties with a high specific capacitance (960 F g–1 at 2 A g–1) and excellent rate capability (83.7% retention at 30 A g–1). In addition, an in‐plane supercapacitor device with an interdigital design is fabricated based on a CoNi‐LDH/PEDOT:PSS thin film, delivering a significantly enhanced energy and power output (an energy density of 46.1 Wh kg–1 at 11.9 kW kg–1). Its application in miniaturized devices is further demonstrated by successfully driving a photodetector. These characteristics demonstrate that the molecular‐scale assembly of LDH monolayers and the conducting polymer is promising for energy storage and conversion applications in miniaturized electronics.