Multilayered poly(p-phenylenevinylene)/reduced graphene oxide film: an efficient organic current collector in an all-plastic supercapacitor.
Multilayered poly(p-phenylenevinylene)/reduced graphene oxide film: an efficient organic current collector in an all-plastic supercapacitor.
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DOI：
10.1021/la500636m
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发表时间：
2014-04
期刊：
影响因子：
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通讯作者：
B. Wee;Jong-Dal Hong
中科院分区：
文献类型：
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作者：
B. Wee;Jong-Dal Hong
本文描述了采用层层沉积技术制备全固态柔性面内超级电容器，该超级电容器基于聚对苯二甲酸乙二醇酯（PET）基板，层压有两层超薄多层膜，该多层膜由30个聚苯胺（PANi）/还原氧化石墨烯（RGO）双层和30个超薄多层膜组成。 聚（对亚苯基亚乙烯基）（PPV）/RGO 双层。评估了 (PPV/RGO)30 层对 PET 上支撑的 (PANi/RGO)30/(PPV/RGO)30 薄膜（表示为 P30）（d = 90.1 nm）电化学性能的影响，并与 (PANi/RGO)53 薄膜（表示为 P53）（d = 91.5 nm）的相应影响进行比较。 P30在20 A/cm(3)放电电流下的体积电容(957 F/cm(3))远高于P53获得的体积电容(733 F/cm(3))，表明(PPV/RGO)30薄膜作为集流体表现良好。此外，与EC53（用P30电极组装）相比，以并联模式组装的全固态柔性面内EC（表示为EC30）表现出出色的体积电容（20 A/cm（3）时为152 F/cm（3）），具有高能量密度（9.4 mW h/cm（3））和功率密度（6.5 W/cm（3））。 P53）。 P30 电极的电子转移电阻仅相当于 P53 值的 59%（1.53 vs 2.60 kΩ cm(2)）。 EC30 的高电容归因于 P30 的低内阻，这是由于电极中存在额外的面内电通路。经过 1000 次充电/放电循环测试后，增强的传输使 EC30 的电容保持率为 85%（EC53 为 69%）。 EC30 的串联电阻变化 (ΔR/R0) 也表明该器件具有良好的机电耐久性，在最小半径 5 mm 的 1000 次弯曲循环中，电阻增加了 5.0%（相比之下，EC53 增加了 10.8%）。 EC30 优异的电化学性能可能满足柔性、轻质、机械耐用的微电子应用制造中对小型化电极的要求。
This article describes the preparation, using layer-by-layer deposition techniques, of an all-solid-state flexible in-plane supercapacitor based on a poly(ethylene terephthalate) (PET) substrate, laminated with two strata of ultrathin multilayer films composed of 30 polyaniline (PANi)/reduced graphene oxide (RGO) bilayers and 30 poly(p-phenylenevinylene) (PPV)/RGO bilayers. The influence of the (PPV/RGO)30 stratum on the electrochemical properties of the (PANi/RGO)30/(PPV/RGO)30 film (denoted P30) (d = 90.1 nm) supported on a PET was evaluated and compared to the corresponding influence of the (PANi/RGO)53 film (denoted P53) (d = 91.5 nm). The volumetric capacitance of P30 at a discharge current of 20 A/cm(3) (957 F/cm(3)) was much higher than that obtained from P53 (733 F/cm(3)), indicating that the (PPV/RGO)30 film performed well as a current collector. Furthermore, an all-solid-state flexible in-plane EC assembled with P30 electrodes in parallel mode (denoted EC30) exhibited an outstanding volumetric capacitance (152 F/cm(3) at 20 A/cm(3)) with a high energy density (9.4 mW h/cm(3)) and power density (6.5 W/cm(3)), compared to EC53 (assembled with P53). The electron-transfer resistance of the P30 electrode corresponded to only 59% of the P53's value (1.53 vs 2.60 kΩ cm(2)). The high capacitance of EC30 was attributed to the low internal resistance of P30, which resulted from the presence of additional in-plane electrical pathways in the electrode. The enhanced transport led to 85% capacitance retention by EC30 (69% for EC53) after a 1000 charge/discharge cycles test. The series resistance variations (ΔR/R0) of EC30 also indicated good electromechanical durability in the device, with a 5.0% increase in the resistance (contrasted with a 10.8% increase in EC53) over 1000 bending cycles at a minimum radius of 5 mm. The excellent electrochemical properties of EC30 may potentially meet the requirements for miniaturized electrodes in the manufacture of flexible, lightweight, mechanically durable microelectronic applications.