Applications of Supercapacitors

Nigam, Ravi; Verma, Kapil Dev; Pal, Tanvi; Kar, Kamal K.

doi:10.1007/978-3-030-52359-6_17

Cited by 19 publications

(6 citation statements)

References 53 publications

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“…The electrochemical properties of the electrodes were tested by cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS). The specific capacitance value ( C s ) of the electrode was calculated using the GCD method, applying eq : C s = 2 I ∫ V .25em normald t m false( normalΔ V false) 2 where I / m is the current density, ∫ V d t is an area of discharge curve, and Δ V is the potential window …”

Section: Methodsmentioning

confidence: 99%

Porous Electrospun Carbon Nanofibers Bearing TiO₂ Hollow Nanospheres for Supercapacitor Electrodes

Wongprasod,

Tanapongpisit,

Laohana

et al. 2024

ACS Appl. Nano Mater.

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A facile fabrication method was introduced to enhance the specific surface area and porosity of the carbon nanofibers. The carbon nanofibers bearing TiO 2 hollow nanosphere electrodes were synthesized using an electrospinning technique followed by heat treatment. Varying amounts of as-prepared TiO 2 hollow nanospheres were incorporated into the polymer precursor to examine their impact on the electrode enhancement. The electrochemical performance of supercapacitor electrodes composed of carbon nanofibers bearing TiO 2 hollow nanospheres was investigated. Results revealed that the specific capacitance of the bare carbon nanofibers electrode (170 F g −1 at a current density of 0.5 A g −1 ) was significantly improved upon when embedded with 5 wt % TiO 2 hollow nanospheres of 191 F g −1 . Additionally, the carbon nanofibers bearing 5 wt % TiO 2 hollow nanosphere electrodes demonstrated excellent cycling stability, retaining 97% of its initial specific capacitance even after 10000 cycles. Additionally, the electrochemical performance of asymmetric supercapacitors from these electrodes was also demonstrated. These findings highlight the ability of as-prepared TiO 2 hollow nanospheres to improve the efficiency of the carbon nanofibers electrode due to the optimum porosity to the amount of TiO 2 hollow nanospheres in the carbon nanofibers, opening up possibilities for the development of high-performance supercapacitors.

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Section: Methodsmentioning

confidence: 99%

Porous Electrospun Carbon Nanofibers Bearing TiO₂ Hollow Nanospheres for Supercapacitor Electrodes

Wongprasod,

Tanapongpisit,

Laohana

et al. 2024

ACS Appl. Nano Mater.

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“…Supercapacitors have already reached the market and are used in fast charging of public transportation, as well as in combination with fuel cells for maximized energy storage and rapid charging capabilities. [2] The two prominent advantages of supercapacitors are high power, which is expressed in fast charging and discharging, and high cyclability. [3] Despite their fast charging and high-power features, the relatively low specific energy (1-15 Wh kg À 1 ) and energy density (5-30 Wh L À 1 ) of supercapacitors restrict them as EES devices for most PEDs that require a large and continuous energy supply.…”

Section: Introductionmentioning

confidence: 99%

Formation of a CoMn‐Layered Double Hydroxide/Graphite Supercapacitor by a Single Electrochemical Step

et al. 2022

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Hybrid electric storage systems that combine capacitive and faradaic materials need to be well designed to benefit from the advantages of batteries and supercapacitors. The ultimate capacitive material is graphite (GR), yet high capacitance is usually not achieved due to restacking of its sheets. Therefore, an appealing approach to achieve high power and energy systems is to embed a faradaic 2D material in between the graphite sheets. Here, a simple one-step approach was developed, whereby a faradaic material [layered double hydroxide (LDH)] was electrochemically formed inside electrochemically exfoliated graphite. Specifically, GR was exfoliated under negative potentials by Co II and, in the presence of Mn II , formed GR-CoMn-LDH, which exhibited a high areal capacitance and energy density. The high areal capacitance was attributed to the exfoliation of the graphite at very negative potentials to form a 3D foam-like structure driven by hydrogen evolution as well as the deposition of CoMn-LDH due to hydroxide ion generation inside the GR sheets. The ratio between the Co II and Mn II in the CoMn-LDH was optimized and analyzed, and the electrochemical performance was studied. Analysis of a crosssection of the GR-CoMn-LDH confirmed the deposition of LDH inside the GR layers. The areal capacitance of the electrode was 186 mF cm À 2 at a scan rate of 2 mV s À 1 . Finally, an asymmetric supercapacitor was assembled with GR-CoMn-LDH and exfoliated graphite as the positive and negative electrodes, respectively, yielding an energy density of 96.1 μWh cm À 3 and a power density of 5 mW cm À 3 .

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“…The modern world depends much on the alternative of fossil fuels such as supercapacitors and conventional energy storage devices, due to the rapid growth of hybrid electric vehicles, electric vehicles, fuel cell vehicles, uninterruptible power supplies (UPSs) and other mobile electric devices. 5,6 On the basis of charge storage principles, supercapacitors are categorized into two groups: pseudo-capacitors and electrochemical double-layer capacitors (EDLCs). In general, pseudo-capacitors show better electrochemical performance than EDLCs and the performance of supercapacitors largely depends on the composition of electrode materials.…”

Section: Introductionmentioning

confidence: 99%

Impact of mesoporous SiO₂ support for Ni/polypyrrole nanocomposite particles on their capacitive performance

et al. 2022

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Applications of Supercapacitors

Cited by 19 publications

References 53 publications

Porous Electrospun Carbon Nanofibers Bearing TiO₂ Hollow Nanospheres for Supercapacitor Electrodes

Porous Electrospun Carbon Nanofibers Bearing TiO₂ Hollow Nanospheres for Supercapacitor Electrodes

Formation of a CoMn‐Layered Double Hydroxide/Graphite Supercapacitor by a Single Electrochemical Step

Impact of mesoporous SiO₂ support for Ni/polypyrrole nanocomposite particles on their capacitive performance

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Applications of Supercapacitors

Cited by 19 publications

References 53 publications

Porous Electrospun Carbon Nanofibers Bearing TiO2 Hollow Nanospheres for Supercapacitor Electrodes

Porous Electrospun Carbon Nanofibers Bearing TiO2 Hollow Nanospheres for Supercapacitor Electrodes

Formation of a CoMn‐Layered Double Hydroxide/Graphite Supercapacitor by a Single Electrochemical Step

Impact of mesoporous SiO2 support for Ni/polypyrrole nanocomposite particles on their capacitive performance

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Product

Resources

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Porous Electrospun Carbon Nanofibers Bearing TiO₂ Hollow Nanospheres for Supercapacitor Electrodes

Porous Electrospun Carbon Nanofibers Bearing TiO₂ Hollow Nanospheres for Supercapacitor Electrodes

Impact of mesoporous SiO₂ support for Ni/polypyrrole nanocomposite particles on their capacitive performance