Flexible Symmetric Supercapacitors Based on TiO$_2$ and Carbon Nanotubes

Chien, Chung-Jen; Deora, Suvil; Chang, Pai‐Chun; Li, Dong Dong; Lu, Jia Grace

doi:10.1109/tnano.2010.2069569

Cited by 23 publications

(10 citation statements)

References 23 publications

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“…[ 185,186 ] In general, vanadium oxides can provide high pseudo-capacitance but limited specifi c surface area and electrical conductivity. To overcome this problem, nanostructured vanadium oxide was deposited onto the surface of porous CNT electrodes via atomic layer deposition and the thicknesses of vanadium oxide layer can be well controlled.…”

Section: Cnt/transition Metal Oxide Composite Architecturesmentioning

confidence: 99%

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Programmable Nanocarbon‐Based Architectures for Flexible Supercapacitors

Niu

Liu

Zhang

et al. 2015

Advanced Energy Materials

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Supercapacitors (SCs), also called electrochemical capacitors, often show high power density, excellent charge/discharge rates, and long cycle life. The recent development of flexible and wearable electronic devices requires that their power sources be sufficiently compact and flexible to match these electronic components. Therefore, flexible SCs have attracted much attention to power current advanced electronics that can be flexible and wearable. In the past several years, many different strategies have been developed to programmably construct different nanocarbon materials into bendable electrode architectures. Furthermore, flexible SC devices with simplified configurations have also been designed based on these nanocarbon‐based architectures. Here, recent developments in the programmable assembly of bendable architectures based on nanocarbon materials are presented. Additionally, the design of flexible nanocarbon‐based SC devices with various configurations is highlighted. The progress made recently paves the way for further development of nanocarbon architectures and corresponding flexible SC devices. Future development and prospects in this area are also analyzed.

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Section: Cnt/transition Metal Oxide Composite Architecturesmentioning

confidence: 99%

“…In addition to MnO 2 and In 2 O 3 , other transition metal oxides were also developed to enhance the energy density of the nanocarbon‐based electrodes . In general, vanadium oxides can provide high pseudo‐capacitance but limited specific surface area and electrical conductivity.…”

Section: Nanocarbon/transition Metal Oxide Composite Architecturesmentioning

confidence: 99%

Programmable Nanocarbon‐Based Architectures for Flexible Supercapacitors

Niu

Liu

Zhang

et al. 2015

Advanced Energy Materials

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“…It is apparent that the capacitive intensity in the 1‐SWCNT/TiO 2 electrode is much higher than expected according to the rule of mixtures. In TiO 2 composites, synergistic improvements in the double‐layer capacitance have been reported in carbon xerogel/TiO 2 , multi‐walled carbon nanotube/TiO 2 ,, and graphene/TiO 2 electrodes ,. The increase in capacitance has been typically associated to surface area and electrical conductivity given by the nanostructured carbon materials.…”

Section: Resultsmentioning

confidence: 99%

Capacitive and Charge Transfer Effects of Single‐Walled Carbon Nanotubes in TiO₂ Electrodes

et al. 2019

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The transfer of nanoscale properties from single‐walled carbon nanotubes (SWCNTs) to macroscopic systems is a topic of intense research. In particular, inorganic composites of SWCNTs and metal oxide semiconductors are being investigated for applications in electronics, energy devices, photocatalysis, and electroanalysis. In this work, a commercial SWCNT material is separated into fractions containing different conformations. The liquid fractions show clear variations in their optical absorbance spectra, indicating differences in the metallic/semiconducting character and the diameter of the SWCNTs. Also, changes in the surface chemistry and the electrical resistance are evidenced in SWCNT solid films. The starting SWCNT sample and the fractions as well are used to prepare hybrid electrodes with titanium dioxide (SWCNT/TiO2). Raman spectroscopy reflects the optoelectronic properties of SWCNTs in the SWCNT/TiO2 electrodes, while the electrochemical behavior is studied by cyclic voltammetry. A selective development of charge transfer characteristics and double‐layer behavior is achieved through the suitable choice of SWCNT fractions.

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“…The proposed model with parallel SP branches is limited to double layer SCs (corresponding to the most widespread SCs technology for high power applications and to the tested components in this paper) as SP structure is purely associated with double layer energy storage. SCs using pseudo capacitance as a major storage mechanism have a different impedance spectrum in high frequency due to charge transfer and are more close to battery [26]. Thus, even though the principle of branches identification by frequency zone can be applied to pseudo capacitive SCs, a specific model with supplementary equivalent parameters has to be developed.…”

Section: A Principlementioning

confidence: 99%

Novel Experimental Identification Method for a Supercapacitor Multipore Model in Order to Monitor the State of Health

German

Hammar

Lallemand

et al. 2016

IEEE Trans. Power Electron.

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Supercapacitors (SCs)impedance modeling represents one important key to get information for SCs health monitoring and simulation. As a matter of fact, SCs behavior is dependent on various parameters such as pore size distribution of electrodes, electrolyte state, temperature, aging… We propose in this work to model supercapacitor taking into account physical considerations. Basing on theory on homogenous structure impedance, we define in first time, single pore (SP) model using uniform size of pores distribution. In the second step, we attempt to generalize this circuit model considering an electrode with different pores sizes or different penetrabilities of the pores. This model called multi-pore (MP) model (or multi-penetrability model) has been developed by our laboratories. This model allows analyzing the behavior of supercapacitor by modelling each group of electrode pores as a branch of an electrical equivalent circuit. This paper is the first in literature to give a simple and reproducible method for MP model parameters identification. The validity of the identification method will also be verified at different supercapacitor aging rates thanks to experimental aging tests.

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Flexible Symmetric Supercapacitors Based on TiO$_2$ and Carbon Nanotubes

Cited by 23 publications

References 23 publications

Programmable Nanocarbon‐Based Architectures for Flexible Supercapacitors

Programmable Nanocarbon‐Based Architectures for Flexible Supercapacitors

Capacitive and Charge Transfer Effects of Single‐Walled Carbon Nanotubes in TiO₂ Electrodes

Novel Experimental Identification Method for a Supercapacitor Multipore Model in Order to Monitor the State of Health

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Flexible Symmetric Supercapacitors Based on TiO$_2$ and Carbon Nanotubes

Cited by 23 publications

References 23 publications

Programmable Nanocarbon‐Based Architectures for Flexible Supercapacitors

Programmable Nanocarbon‐Based Architectures for Flexible Supercapacitors

Capacitive and Charge Transfer Effects of Single‐Walled Carbon Nanotubes in TiO2 Electrodes

Novel Experimental Identification Method for a Supercapacitor Multipore Model in Order to Monitor the State of Health

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Product

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Capacitive and Charge Transfer Effects of Single‐Walled Carbon Nanotubes in TiO₂ Electrodes