Electrochemical performance of various activated carbon-multi-walled carbon nanotubes symmetric supercapacitor electrodes in aqueous electrolytes

Thillaikkarasi, D. Thillaikkarasi D.; Karthikeyan, Srinivasan; Ramesh, R.; Prabhu, Shivananda; Kavitha, D.; Malarvizhi, Muthubalasubramanian

doi:10.1007/s42823-022-00386-y

Cited by 20 publications

(3 citation statements)

References 108 publications

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“…In fact, the limitation of the narrow electrochemical window can be overcome in highly concentrated aqueous electrolytes, also known as water-in-salt (WiS) electrolytes [ 8 , 9 , 10 , 11 , 12 , 13 ], which have been shown to significantly widen the electrochemical stability window to over 3.0 V, via interface modification [ 14 , 15 ], or the development of chemically stable, high surface area carbon structures [ 16 , 17 , 18 ]. As a result, aqueous electrolytes are still popular in the study of EDLCs [ 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

RETRACTED: Capacitive Behavior of Aqueous Electrical Double Layer Based on Dipole Dimer Water Model

2022

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The aim of the present paper is to investigate the possibility of using the dipole dimer as water model in describing the electrical double layer capacitor capacitance behaviors. Several points are confirmed. First, the use of the dipole dimer water model enables several experimental phenomena of aqueous electrical double layer capacitance to be achievable: suppress the differential capacitance values gravely overestimated by the hard sphere water model and continuum medium water model, respectively; reproduce the negative correlation effect between the differential capacitance and temperature, insensitivity of the differential capacitance to bulk electrolyte concentration, and camel–shaped capacitance–voltage curves; and more quantitatively describe the camel peak position of the capacitance–voltage curve and its dependence on the counter-ion size. Second, we fully illustrate that the electric dipole plays an irreplaceable role in reproducing the above experimentally confirmed capacitance behaviors and the previous hard sphere water model without considering the electric dipole is simply not competent. The novelty of the paper is that it shows the potential of the dipole dimer water model in helping reproduce experimentally verified aqueous electric double layer capacitance behaviors. One can expect to realize this potential by properly selecting parameters such as the dimer site size, neutral interaction, residual dielectric constant, etc.

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Section: Introductionmentioning

confidence: 99%

RETRACTED: Capacitive Behavior of Aqueous Electrical Double Layer Based on Dipole Dimer Water Model

2022

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“…The Ragone plot (Figure 5e) demonstrates that the AC// CNF-5hTiO 2 system achieves a maximum energy density of 2.7 Wh kg −1 with a corresponding power density of 278.9 W kg −1 , outperforming various published devices, including CNFs electrode, 67 MWCNTs−MWCNTs symmetric supercapacitor, 68 NCF-SSC device, 69 and graphene/MnO 2 //graphene/ MnO 2 symmetrical supercapacitor. 70 Furthermore, stability testing over 1000 cycles at 1 A g −1 (Figure 5f) reveals an impressive 103% increase in specific capacitance for AC//CNF-5hTiO 2 , while AC//CNF-Bare shows a slight decrease to 97%.…”

Section: Electrochemical Measurementmentioning

confidence: 97%

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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“…[5][6][7][8][9][10][11] SCs have also been acknowledged as potential substitutes for conventional rechargeable batteries in applications such as civil aviation, military, telecommunications, automobiles, and portable electronics that benet from rapid power harvesting and delivery. [12][13][14][15][16][17][18][19][20] SCs store electrochemical energy mainly via electric double-layer capacitance (EDLC) using reversible ion adsorption or via pseudocapacitance using surface-assisted, reversible faradaic reactions. 21,22 Among them, EDLC occurs in different kinds of carbon derivatives including biomass derived activated carbons (ACs) where carbon derivatives comprise large specic surface areas (SSAs), high electrical conductivities, and suitable physicochemical properties, making them applicable to commercial SCs.…”

Section: Introductionmentioning

confidence: 99%

Electrolyte ions-matching hierarchically porous biochar electrodes with an extended potential window for next-generation supercapacitors

Raju¹,

Kondrat²,

Chodankar³

et al. 2023

J. Mater. Chem. A

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Electrochemical performance of various activated carbon-multi-walled carbon nanotubes symmetric supercapacitor electrodes in aqueous electrolytes

Cited by 20 publications

References 108 publications

RETRACTED: Capacitive Behavior of Aqueous Electrical Double Layer Based on Dipole Dimer Water Model

RETRACTED: Capacitive Behavior of Aqueous Electrical Double Layer Based on Dipole Dimer Water Model

Porous Electrospun Carbon Nanofibers Bearing TiO₂ Hollow Nanospheres for Supercapacitor Electrodes

Electrolyte ions-matching hierarchically porous biochar electrodes with an extended potential window for next-generation supercapacitors

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Electrochemical performance of various activated carbon-multi-walled carbon nanotubes symmetric supercapacitor electrodes in aqueous electrolytes

Cited by 20 publications

References 108 publications

RETRACTED: Capacitive Behavior of Aqueous Electrical Double Layer Based on Dipole Dimer Water Model

RETRACTED: Capacitive Behavior of Aqueous Electrical Double Layer Based on Dipole Dimer Water Model

Porous Electrospun Carbon Nanofibers Bearing TiO2 Hollow Nanospheres for Supercapacitor Electrodes

Electrolyte ions-matching hierarchically porous biochar electrodes with an extended potential window for next-generation supercapacitors

Contact Info

Product

Resources

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Porous Electrospun Carbon Nanofibers Bearing TiO₂ Hollow Nanospheres for Supercapacitor Electrodes