Flexible and transparent supercapacitor based on In2O3 nanowire/carbon nanotube heterogeneous films

Chen, Po‐Chiang; Shen, Guozhen; Sukcharoenchoke, Saowalak; Zhou, Chongwu

doi:10.1063/1.3069277

Cited by 191 publications

(179 citation statements)

References 22 publications

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“…However, some aspects of device performance, such as the high ESR and low energy density, need to be further improved. As proposed in our earlier work [27], we adapted a simple and efficient solution for fabricating hybrid nanostructured thin film electrodes through the integration of metal oxide nanowires and carbon nanotube films. This significantly improved the device performance, due to the pseudocapacitance contributed by the metal oxide nanowires.…”

Section: Resultsmentioning

confidence: 99%

“…As we discussed earlier, this can be attributed to the high sheet resistance of SWNT films printed on cloth fabric. The specific capacitance can be calculated from the charge/discharge curves by using the equation [8,27,30],…”

Section: Resultsmentioning

confidence: 99%

“…Owing to its unique properties, such as metallic conductivity, intrinsic reversibility of surface redox reactions, and ultrahigh pseudocapacitance, RuO 2 has become one of the most promising electrode materials for electrochemical capacitors [24][25][26]. As we proposed earlier [27], instead of using SWNT films alone, we integrated RuO 2 nanowires together with SWNT films and fabricated hybrid RuO 2 nanowire/ printed SWNT nanostructured films. Importantly, the printed supercapacitors can be fully integrated with the fabrication process used in current printing electronics.…”

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confidence: 99%

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Inkjet printing of single-walled carbon nanotube/RuO2 nanowire supercapacitors on cloth fabrics and flexible substrates

et al. 2010

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Single-walled carbon nanotube (SWNT) thin film electrodes have been printed on flexible substrates and cloth fabrics by using SWNT inks and an off-the-shelf inkjet printer, with features of controlled pattern geometry (0.4-6 cm 2 ), location, controllable thickness (20-200 nm), and tunable electrical conductivity. The as-printed SWNT films were then sandwiched together with a piece of printable polymer electrolyte to form flexible and wearable supercapacitors, which displayed good capacitive behavior even after 1,000 charge/discharge cycles. Furthermore, a simple and efficient route to produce ruthenium oxide (RuO 2 ) nanowire/SWNT hybrid films has been developed, and it was found that the knee frequency of the hybrid thin film electrodes can reach 1,500 Hz, which is much higher than the knee frequency of the bare SWNT electrodes (~158 Hz). In addition, with the integration of RuO 2 nanowires, the performance of the printed SWNT supercapacitor was significantly improved in terms of its specific capacitance of 138 F/g, power density of 96 kW/kg, and energy density of 18.8 Wh/kg. The results indicate the potential of printable energy storage devices and their significant promise for application in wearable energy storage devices.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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confidence: 99%

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Inkjet printing of single-walled carbon nanotube/RuO2 nanowire supercapacitors on cloth fabrics and flexible substrates

et al. 2010

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“…Since the fi rst report [ 7 ] that showed promising high power density (8 kW kg − 1 ), there has been increasing interest in CNTs as supercapacitor electrodes. Thus far, CNT electrodes have not only achieved notable energy and power performance (7 Wh kg − 1 , 20 kW kg − 1 ), [ 8 ] they have also enabled new functionalities such as fl exible [ 9 ] and transparent [ 10 ] supercapacitors. Moreover, nanostructured CNT composites [ 11 ] have shown exceptionally high capacitance (100 F g − 1 ) at high discharge rate (77 A g − 1 ).…”

Section: Doi: 101002/adma200904349mentioning

confidence: 99%

Extracting the Full Potential of Single‐Walled Carbon Nanotubes as Durable Supercapacitor Electrodes Operable at 4 V with High Power and Energy Density

et al. 2010

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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

145

135

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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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Flexible and transparent supercapacitor based on In2O3 nanowire/carbon nanotube heterogeneous films

Cited by 191 publications

References 22 publications

Inkjet printing of single-walled carbon nanotube/RuO2 nanowire supercapacitors on cloth fabrics and flexible substrates

Inkjet printing of single-walled carbon nanotube/RuO2 nanowire supercapacitors on cloth fabrics and flexible substrates

Extracting the Full Potential of Single‐Walled Carbon Nanotubes as Durable Supercapacitor Electrodes Operable at 4 V with High Power and Energy Density

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

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