Trade-off between areal capacitance and optical transmittance of highly transparent MnO2 electrodes for supercapacitors

Jin, Sohyun; Ryu, Ilhwan; Choe, Geunpyo; Song, Sun‐Ju; Kim, Hyung Min; Hong, Dajung; Yim, Sanggyu

doi:10.1016/j.est.2022.104641

Cited by 14 publications

(11 citation statements)

References 47 publications

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“…In [38] NiMn 2 O 4 nanomaterials were fabricated on tissue paper by a sol-gel process and the material demonstrated a high specific capacity of 303 F/g at the discharge current density of 0.5 A/g; furthermore, GCD studies show good cyclic stability after 5000 cycles. Conversely, in [39], the pure MnO 2 thin-film transparent electrodes prepared through the sol-gel route showed a specific capacity of 576 F/g. The main result of [39] is that the areal capacitance in the range of transparency was related to the thickness of the film.…”

Section: Mn-based Materialsmentioning

confidence: 93%

“…Conversely, in [39], the pure MnO 2 thin-film transparent electrodes prepared through the sol-gel route showed a specific capacity of 576 F/g. The main result of [39] is that the areal capacitance in the range of transparency was related to the thickness of the film.…”

Section: Mn-based Materialsmentioning

confidence: 93%

“…Manganese-based nanomaterials as a potential electrode can be measured as a promising candidate owing to being very cheap, naturally viable, and harmless, as demonstrated in [35,38,39]. In [38] NiMn2O4 nanomaterials were fabricated on tissue paper by a sol-gel process and the material demonstrated a high specific capacity of 303 F/g at the NiCo 2 O 4 /CeO 2 nanomaterials were prepared with a different mole ratio of Ce (0.2 to 1.0) in an aqueous medium [37].…”

Section: Mn-based Materialsmentioning

confidence: 99%

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Sol-Gel Materials for Electrochemical Applications: Recent Advances

2022

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This review article emphases on the modern approaches to the types of sol-gel materials that are beneficial for electrochemistry, monitored by a report of recent advances in the numerous fields of sol-gel electrochemistry. Modified electrodes for sensors and supercapacitors as well as anti-corrosion are described. Sol-gel synthesis expands the capabilities of technologists to obtain highly porous, homogeneous, and hybrid thin-film materials for supercapacitor electrode application. The widespread materials are transition metal oxides, but due to their low conductivity, they greatly impede the rate capability of electrochemical supercapacitors. The way to optimize their properties is the production of complex oxides or different composites. Among the new materials, a special place is occupied by perovskites and materials with an olivine-type structure, which can be easily obtained by the sol-gel method. The sol-gel coating process has demonstrated excellent chemical stability to advance the corrosion resistance of the various metal alloy substrates. Furthermore, the sol-gel process is a user-friendly technique for applying a hybrid sol-gel coating to provide corrosion resistance. The hybrid sol-gel coating technique is the most attractive, easy to prepare at a lower temperature, and has shown the potential to swap Cr-based coatings. The hybrid sol-gel coating has exhibited promising properties of adherent and uses chemically inert to enhance the corrosion resistance of the metal and alloys. Hence, this review article emphases on the recent advances and approaches in the sol-gel coating processes that influence the belongings of its hybrid sol-gel coating for protecting metal substrates and their alloys from corrosion. In addition, the author discusses the current problem and challenges of hybrid anti-corrosion sol-gel coatings. Metal oxides and composites based on them are actively used to create electrochemical sensors. They synthesized, including the anhydrous and citrate sol-gel methods. Such materials are widely used as glucose biosensors and harmful gas sensors.

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Section: Mn-based Materialsmentioning

confidence: 93%

Section: Mn-based Materialsmentioning

confidence: 93%

Section: Mn-based Materialsmentioning

confidence: 99%

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Sol-Gel Materials for Electrochemical Applications: Recent Advances

2022

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“…The samples were prepared via CV and CA method. (1, 2) pH1_CV_60 (30 cycles), (3,4) pH1_CV_60 (40 cycles), (5,6) pH1_CV_90, (7, 8) pH1_CA_60, (9, 10) pH1_CA_90, (11,12) pH2_CV_60, (13,14) pH2_CV_90, (15, 16) pH2_CA_60, (17,18) pH2_CA_90, (19,20) pH3.5_CV_60, (21,22) pH3.5_CV_90, (23,24) pH3.5_CA_60, (25,26) pH3.5_CA_90. For details, see main text.…”

Section: 2mentioning

confidence: 99%

“…Particular attention is paid to the methods of its formation. Most researchers prefer time-consuming thermochemical or sol-gel techniques for the formation of dioxide [14], [15]. [16], [17], [18].…”

Section: Introductionmentioning

confidence: 99%

Formation of MnO2-based electrodes with high catalytic activity on the surface of ITO for glucose detection

Poltavets

Krawczyk

Maslak³

et al. 2023

Preprint

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In this paper, we report on the formation of MnO2-based electrodes for the determination of hydrogen peroxide. We apply thin films of manganese dioxide on the surface of indium tin oxide-coated glass (ITO) using electrochemical deposition under different conditions. MnO2 is a selective catalyst for the decomposition of hydrogen peroxide. Of all methods of sediment formation, we settled on anodic electrodeposition in sulphate electrolytes. By changing the conditions of the process, we can form an electrode material MnO2/ITO with maximum catalytic performance. The electrodes were characterized by SEM, electrochemical impedance spectroscopy, and XPS. The MnO2/ITO and GOx/MnO2/ITO (modified with glucose oxidase enzymes (GOx)) electrodes’ sensing properties were studied by chronoamperometry at an applied potential and by cyclic voltammetry. The film of manganese dioxide with the best catalytic characteristics is formed by electrochemical deposition on the surface of the ITO in electrolyte with pH 1 by CV method during 30 cycles at the range of potentials 0.65 V – 2.1 V vs Ag/AgCl/3M KCl and after this drying at 60°C. the MnO2 films form branching networks which provide an extra-large surface area and show high conductivity. As a proof-of-principle, we developed a GOx/MnO2/ITO working electrode for biosensors for the detection of glucose based on the electrocatalytic determination of hydrogen peroxide generated in the process of enzymatic glucose oxidation. The calibration curve of the GOx/MnO2/ITO electrode shows a linear relationship with the concentration of glucose from 0.1 mM to 3 mM with a correlation coefficient of 0.9938. The sensitivity of such an electrode is 117.8 μA/mmol cm2. The developed electrode can be used in glucose biosensors or similar systems based on other oxidases.

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Overcoming the Trade‐Off between Optical Transmittance and Areal Capacitance of Transparent Supercapacitors for Practical Application

Ryu

Choe

Kwon

et al. 2023

Small

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It is substantially challenging for transition metal oxide nanoparticle (NP)‐based electrodes for supercapacitors to achieve high transparency and large capacity simultaneously due to the inherent trade‐off between optical transmittance (T) and areal capacitance (CA). This study demonstrates how this trade‐off limitation can be overcome by replacing some electrode NPs with transparent tin oxide (SnO2) NPs. Although SnO2 NPs are non‐capacitive, they provide effective paths for charge transport, which simultaneously increase the CA and T550nm of the manganese oxide (Mn3O4) NP electrode from 11.7 to 13.4 mF cm−2 and 82.1% to 87.4%, respectively, when 25 wt% of Mn3O4 are replaced by SnO2. The obtained CA values at a given T are higher than those of the transparent electrodes previously reported. An energy storage window fabricated using the mixed‐NP electrodes exhibits the highest energy density among transparent supercapacitors previously reported. The improved energy density enables the window to operate various electronic devices for a considerable amount of time, demonstrating its applicability in constructing a reliable and space‐efficient building‐integrated power supply system.

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Trade-off between areal capacitance and optical transmittance of highly transparent MnO2 electrodes for supercapacitors

Cited by 14 publications

References 47 publications

Sol-Gel Materials for Electrochemical Applications: Recent Advances

Sol-Gel Materials for Electrochemical Applications: Recent Advances

Formation of MnO2-based electrodes with high catalytic activity on the surface of ITO for glucose detection

Overcoming the Trade‐Off between Optical Transmittance and Areal Capacitance of Transparent Supercapacitors for Practical Application

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