Contact angle measurements: a preliminary diagnostic tool for evaluating the performance of ZnFe<sub>2</sub>O<sub>4</sub> nano-flake based supercapacitors

Vadiyar, Madagonda M.; Bhise, Sagar C.; Patil, Sandip K.; Kolekar, Sanjay S.; Shelke, A.R.; Deshpande, Nishad G.; Chang, Jia-Yaw; Ghule, Kaustubh S.; Ghule, Anil V.

doi:10.1039/c5cc08373g

Cited by 75 publications

(40 citation statements)

References 27 publications

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“…S6, † inset). 54 PMC-based electrode gave a smaller CA value, which was in agreement with the larger CV integrated area, and thus a higher specic capacitance. The CV curves of PMC-based SC remained a relatively rectangular shape at various scan rates from 5 to 500 mV s À1 , indicating a near-ideal capacitive behavior with good rate performance (Fig.…”

Section: Electrochemical Measurementssupporting

confidence: 75%

Fabrication of N-doped and shape-controlled porous monolithic carbons from polyacrylonitrile for supercapacitors

et al. 2017

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Section: Electrochemical Measurementssupporting

confidence: 75%

Fabrication of N-doped and shape-controlled porous monolithic carbons from polyacrylonitrile for supercapacitors

et al. 2017

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“…Thus, contact angle measurement experiments were performed using 1 M LiOH, NaOH, KOH, LiOH‐NaOH, NaOH‐KOH and LiOH‐KOH electrolyte in contact with ZnFe 2 O 4 nano‐flakes thin films as electrode . The measured contact angles show interesting trend as shown Table . These results suggest that the presence of soluble impurities or ionic impurities into the electrolyte system or mixed electrolyte system can significantly degrade the electrochemical performance i. e. specific capacitance of the supercapacitor.…”

Section: Resultsmentioning

confidence: 91%

“…However, the reason of significant drop in specific capacitance on use of mixed electrolyte system, when compared to individual electrolyte system is still not clear. Thus, contact angle measurement experiments were performed using 1 M LiOH, NaOH, KOH, LiOH‐NaOH, NaOH‐KOH and LiOH‐KOH electrolyte in contact with ZnFe 2 O 4 nano‐flakes thin films as electrode . The measured contact angles show interesting trend as shown Table .…”

Section: Resultsmentioning

confidence: 96%

Comparative Study of Individual and Mixed Aqueous Electrolytes with ZnFe₂O₄ Nano–flakes Thin Film as an Electrode for Supercapacitor Application

et al. 2016

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In the present work, ZnFe2O4 nano‐flakes thin films are grown on stainless steel substrate using mechanochemical approach. The prepared thin films are characterized and used as working electrodes for supercapacitor application. Investigation for an ideal electrolyte is systematically carried out by comparing three aqueous electrolytes such as LiOH, NaOH, KOH (1 M) and their binary mixtures (1:1 v/v of 1 M each electrolyte) on the basis of their supercapacitive performances. Among the electrolytes, 1 M KOH is found to be an ideal electrolyte, which demonstrates higher specific capacitance (433 F g−1), cycle stability (91 % retention up to 4000 cycles), energy density (86 Wh kg−1), respectively. The binary mixtures of LiOH‐NaOH, NaOH‐KOH and LiOH‐KOH electrolytes show relatively less specific capacitance of 106, 146 and 180 F g−1, respectively. The use of mixed electrolytes and underlying factors affecting the performance are investigated in detail for the first time. The physical parameters such as conductivity, density, viscosity, contact angle and hydrated ionic radius of aqueous electrolytes influencing the specific capacitance of the ZnFe2O4 nano‐flakes based electrode is studied.

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“…Such surface wetting properties revealed by contact angle data should affect supercapacitive properties of these carbon materials. [24] Due to the enhanced content of hydrophilic oxygen-containing surface functionalities, the surface wetting properties of the activated samples show significant improvement towards water and 2 M KOH solution. The contact angles of DI water and 2 M KOH solution on the thin films of the activated carbon samples all show a clear trend of decrease with the increase of activation temperature.…”

Section: Nitric Acid Activation Of Cns and Characterizationsmentioning

confidence: 99%

Effects of Nitric Acid Activation on Textural, Surface, and Supercapacitive Properties of Ultra-Small Carbon Nanospheres

Chen¹,

Ye²

2019

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Chemical activation of carbon materials is critical to modify their textural and surface properties in an effort to optimize their supercapacitive performance as electrode materials for supercapacitors. This present work investigates the effects of nitric acid activation on the textural, surface, and supercapacitive properties of u ltra-small carbon nanospheres with a uniform size of 24 nm synthesized through a unique catalytic emulsion polymerization strategy. Nitric acid activation has been undertaken at different temperatures for various time. The effects of these two activation parameters have been systematically examined, with some important correlations established. The optimum activation conditions for achieving the best supercapacitive performance in different aqueous electrolytes have been identified.

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Contact angle measurements: a preliminary diagnostic tool for evaluating the performance of ZnFe₂O₄ nano-flake based supercapacitors

Cited by 75 publications

References 27 publications

Fabrication of N-doped and shape-controlled porous monolithic carbons from polyacrylonitrile for supercapacitors

Fabrication of N-doped and shape-controlled porous monolithic carbons from polyacrylonitrile for supercapacitors

Comparative Study of Individual and Mixed Aqueous Electrolytes with ZnFe₂O₄ Nano–flakes Thin Film as an Electrode for Supercapacitor Application

Effects of Nitric Acid Activation on Textural, Surface, and Supercapacitive Properties of Ultra-Small Carbon Nanospheres

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Contact angle measurements: a preliminary diagnostic tool for evaluating the performance of ZnFe2O4 nano-flake based supercapacitors

Cited by 75 publications

References 27 publications

Fabrication of N-doped and shape-controlled porous monolithic carbons from polyacrylonitrile for supercapacitors

Fabrication of N-doped and shape-controlled porous monolithic carbons from polyacrylonitrile for supercapacitors

Comparative Study of Individual and Mixed Aqueous Electrolytes with ZnFe2O4 Nano–flakes Thin Film as an Electrode for Supercapacitor Application

Effects of Nitric Acid Activation on Textural, Surface, and Supercapacitive Properties of Ultra-Small Carbon Nanospheres

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Product

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Contact angle measurements: a preliminary diagnostic tool for evaluating the performance of ZnFe₂O₄ nano-flake based supercapacitors

Comparative Study of Individual and Mixed Aqueous Electrolytes with ZnFe₂O₄ Nano–flakes Thin Film as an Electrode for Supercapacitor Application