Conducting polymer composite film incorporated with aligned carbon nanotubes for transparent, flexible and efficient supercapacitor

Lin, Huijuan; Li, L i; Ren, Jing; Cai, Zaisheng; Qiu, Longbin; Yang, Zhibin; Peng, Huisheng

doi:10.1038/srep01353

Cited by 240 publications

(167 citation statements)

References 31 publications

(40 reference statements)

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“…Owing to the random aggregation of CNTs commonly observed in typical solution processing, charges have to cross many boundaries in random CNT networks with low transfer efficiency, resulting in poor electrochemical performance of the CNTs [58][59][60][61][62][63][64][65][66]. Aligned carbon nanotubes, called as carbon nanotube arrays, have excellent electrical conductivity and provide an outstanding charge transfer rate [63].…”

Section: Cnt Arraysmentioning

confidence: 99%

Recent advances in flexible supercapacitors based on carbon nanotubes and graphene

Zhang

2017

Sci. China Mater.

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Section: Cnt Arraysmentioning

confidence: 99%

Recent advances in flexible supercapacitors based on carbon nanotubes and graphene

Zhang

2017

Sci. China Mater.

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“…[17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] The electrode materials under investigation for this purpose are numerous, including carbon nanotubes, 27,[32][33] graphene, 21,29,34 transition metal oxides 17, 19-20, 23, 25 and conducting polymers. 17,22,30 In some transparent SC reports, the capacitive charge storage materials have been supported by an underlying transparent indium-tin oxide (ITO) layer to provide efficient current collection. [19][20][21][22][23][24][25] However, due to its brittle nature, the growing cost of indium and need for both high-vacuum and high-temperature processing, 36 it is unlikely this material will be 4 compatible with future printed electronics.…”

Section: Introductionmentioning

confidence: 99%

Avoiding Resistance Limitations in High-Performance Transparent Supercapacitor Electrodes Based on Large-Area, High-Conductivity PEDOT:PSS Films

Higgins

Coleman

2015

ACS Appl. Mater. Interfaces

140

134

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This work describes the potential of thin, spray-deposited, large-area poly(3,4-ethylenedioxythiophene)/poly(styrene-4-sulfonate) (PEDOT:PSS) conducting polymer films for use as transparent supercapacitor electrodes. To facilitate this, we provide a detailed explanation of the factors limiting the performance of such electrodes. These films have a very low optical conductivity of σop = 24 S/cm (at 550 nm), crucial for this application, and a reasonable volumetric capacitance of C V = 41 F/cm3. Secondary doping with formic acid gives these films a DC conductivity of σDC = 936 S/cm, allowing them to perform both as a transparent conductor/current collector and transparent supercapacitor electrode. Small-area films (A ∼ 1 cm2) display measured areal capacitance as high as 1 mF/cm2, even for reasonably transparent electrodes (T ∼ 80%). However, in real devices, the absolute capacitance will be maximized by increasing the device area. As such, here, we measure the electrode performance as a function of its length and width. We find that the measured areal capacitance falls dramatically with scan rate and sample length but is independent of width. We show that this is because the measured areal capacitance is limited by the electrical resistance of the electrode. We have derived an equation for the measured areal capacitance as a function of scan rate and electrode lateral dimensions that fits the data extremely well up to scan rates of ∼1000 mV/s (corresponding to charge/discharge times > 0.6 s). These results are self-consistent with independent analysis of the electrical and impedance properties of the electrodes. These results can be used to find limiting combinations of electrode length and scan rate, beyond which electrode performance falls dramatically. We use these insights to build large-area (∼100 cm2) supercapacitors using electrodes that are 95% transparent, providing a capacitance of ∼12 mF (at 50 mV/s), significantly higher than that of any previously reported transparent supercapacitor.

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“…Particularly, CNT networks are anticipated to be used in broader applications, such as reinforcements for lightweight and high performance composites, multifunctional membranes, electronics and electrodes for energy storage devices [2][3][4][5][6] . However, most assembled CNT networks are mainly based on weak van der Waals interactions between the CNTs in CNT arrays 7 .…”

mentioning

confidence: 99%

Sculpting carbon bonds for allotropic transformation through solid-state re-engineering of –sp2 carbon

et al. 2014

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Carbon forms one of nature's strongest chemical bonds; its allotropes having provided some of the most exciting scientific discoveries in recent times. The possibility of inter-allotropic transformations/hybridization of carbon is hence a topic of immense fundamental and technological interest. Such modifications usually require extreme conditions (high temperature, pressure and/or high-energy irradiations), and are usually not well controlled. Here we demonstrate inter-allotropic transformations/hybridizations of specific types that appear uniformly across large-area carbon networks, using moderate alternating voltage pulses. By controlling the pulse magnitude, small-diameter single-walled carbon nanotubes can be transformed predominantly into larger-diameter single-walled carbon nanotubes, multi-walled carbon nanotubes of different morphologies, multi-layered graphene nanoribbons or structures with sp 3 bonds. This re-engineering of carbon bonds evolves via a coalescence-induced reconfiguration of sp 2 hybridization, terminates with negligible introduction of defects and demonstrates remarkable reproducibility. This reflects a potential step forward for large-scale engineering of nanocarbon allotropes and their junctions.

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Conducting polymer composite film incorporated with aligned carbon nanotubes for transparent, flexible and efficient supercapacitor

Cited by 240 publications

References 31 publications

Recent advances in flexible supercapacitors based on carbon nanotubes and graphene

Recent advances in flexible supercapacitors based on carbon nanotubes and graphene

Avoiding Resistance Limitations in High-Performance Transparent Supercapacitor Electrodes Based on Large-Area, High-Conductivity PEDOT:PSS Films

Sculpting carbon bonds for allotropic transformation through solid-state re-engineering of –sp2 carbon

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