Synthesis and enhanced electrochemical supercapacitive properties of manganese oxide nanoflake electrodes

Jo, Young‐Heon; Kim, J.; Han, Jeong In; Pawar, S.M.; Kalubarme, Ramchandra S.; Park, C.J.; Hong, Jin Pyo; Park, Y.S.; Jung, Woo Young; Kim, H.; Im, Hyunsik

doi:10.1016/j.energy.2015.02.058

Cited by 30 publications

(13 citation statements)

References 43 publications

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“…The capacitive current increases quasi-linearly as the scan rate increases and the specific capacitance decreases in a similar way (see Fig. 4b), corroborating the good rate capability of the nanograin WO3+ electrode film and diffusion-controlled reaction based standard Randles-Sevcik equation [50].…”

Section: Electrochemical Supercapacitor Performancesupporting

confidence: 69%

Highly efficient electro-optically tunable smart-supercapacitors using an oxygen-excess nanograin tungsten oxide thin film

Inamdar

Kim

et al. 2017

Solar Energy Materials and Solar Cells

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105

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Next-generation electronic technology requires the use of advanced energy storage devices with integrated functionality to fulfill key application requirements. A smart supercapacitor shares the same electrochemical processes as a conventional energy storage device in addition to electrochromic functionality. It can sense the energy storage level and can display it in a noticeable manner, which results in added convenience to everyday applications. In this study we have developed a smart supercapacitor that uses tungsten oxide nanograin thin film to provide the combined advantages of energy storage and electrochromism. The nanostructured tungsten oxide is dark blue in the charged state and becomes transparent in its discharged state; and it has a specific capacitance of 228 Fg −1 at 0.25 Ag −1 with a quite large potential window of 1.4 V. It is highly durable, exhibits good electrochemical stability over 2000 cycles, retains a significant charge storage of 75%; and exhibits a high coloration efficiency of ~170 cm 2 /C with an optical modulation of 82%. The smart-supercapacitor fabricated with this material exhibits a superb combination of 2 energy storage and electrochromic features in one device to monitor the energy storage level through visible changes in color.

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Section: Electrochemical Supercapacitor Performancesupporting

confidence: 69%

Highly efficient electro-optically tunable smart-supercapacitors using an oxygen-excess nanograin tungsten oxide thin film

Inamdar

Kim

et al. 2017

Solar Energy Materials and Solar Cells

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105

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“…In recent years, attempts have been made to explore inexpensive transition-metal oxide nanomaterials such as manganese oxide, 19–21 cobalt oxide, 22,23 nickel oxide, 24 cobalt hydroxide, 25 and nickel hydroxide 26 due to their potential to offer much higher energy densities and specific capacitances than typical carbon-based EDLCs and conducting polymers. 27 Among them, Mn 3 O 4 nanomaterials have been reported as promising electrode materials for supercapacitor application 28 owing to the high abundance of the Mn element, environmental benignity, low cost, satisfactory energy storage performance, and relatively wide work potential window of these nanomaterials in aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Reduced graphene oxide-mediated synthesis of Mn₃O₄ nanomaterials for an asymmetric supercapacitor cell

Gao

Qiu

et al. 2018

RSC Adv.

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“…Electrochromism is an interesting electrochemical phenomenon observed in oxides and conjugated polymers that have been actively employed in various fields, including energy-efficient smart windows, wearable devices, antiglare rearview mirrors, military camouflage, Li-ion batteries, and displays. − This electrochemically reversible visualization technique can also be combined with various functional devices such as supercapacitors, smart windows, information displays, switchable mirrors, and dynamic shading elements. , Over the last two decades, supercapacitors have also received a considerable amount of interest as a promising energy storage technology because of their high capacitance, good cycling stability, and fast charge–discharge capabilities. − …”

Section: Introductionmentioning

confidence: 99%

Optimal Rule-of-Thumb Design of Nickel–Vanadium Oxides as an Electrochromic Electrode with Ultrahigh Capacity and Ultrafast Color Tunability

Chavan

Hou

et al. 2021

ACS Appl. Mater. Interfaces

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The use of electrodes capable of functioning as both electrochromic windows and energy storage devices has been extended from green building development to various electronics and displays to promote more efficient energy consumption. Herein, we report the electrochromic energy storage of bimetallic NiV oxide (NiVO) thin films fabricated using chemical bath deposition. The best optimized NiVO electrode with a Ni/V ratio of 3 exhibits superior electronic conductivity and a large electrochemical surface area, which are beneficial for enhancing electrochemical performance. The color switches between semitransparent (a discharged state) and dark brown (a charged state) with excellent reproducibility because of the intercalation and deintercalation of OH– ions in an alkaline KOH electrolyte. A specific capacity of 2403 F g–1, a coloration efficiency of 63.18 cm2 C–1, and an outstanding optical modulation of 68% are achieved. The NiVO electrode also demonstrates ultrafast coloration and bleaching behavior (1.52 and 4.79 s, respectively), which are considerably faster than those demonstrated by the NiO electrode (9.03 and 38.87 s). It retains 91.95% capacity after 2000 charge–discharge cycles, much higher than that of the NiO electrode (83.47%), indicating that it has significant potential for use in smart energy storage applications. The superior electrochemical performance of the best NiVO compound electrode with an optimum Ni/V compositional ratio is due to the synergetic effect between the high electrochemically active surface area induced by V-doping-improved redox kinetics (low charge-transfer resistance) and fast ion diffusion, which provides a facile charge transport pathway at the electrolyte/electrode interface.

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Synthesis and enhanced electrochemical supercapacitive properties of manganese oxide nanoflake electrodes

Cited by 30 publications

References 43 publications

Highly efficient electro-optically tunable smart-supercapacitors using an oxygen-excess nanograin tungsten oxide thin film

Highly efficient electro-optically tunable smart-supercapacitors using an oxygen-excess nanograin tungsten oxide thin film

Reduced graphene oxide-mediated synthesis of Mn₃O₄ nanomaterials for an asymmetric supercapacitor cell

Optimal Rule-of-Thumb Design of Nickel–Vanadium Oxides as an Electrochromic Electrode with Ultrahigh Capacity and Ultrafast Color Tunability

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Synthesis and enhanced electrochemical supercapacitive properties of manganese oxide nanoflake electrodes

Cited by 30 publications

References 43 publications

Highly efficient electro-optically tunable smart-supercapacitors using an oxygen-excess nanograin tungsten oxide thin film

Highly efficient electro-optically tunable smart-supercapacitors using an oxygen-excess nanograin tungsten oxide thin film

Reduced graphene oxide-mediated synthesis of Mn3O4 nanomaterials for an asymmetric supercapacitor cell

Optimal Rule-of-Thumb Design of Nickel–Vanadium Oxides as an Electrochromic Electrode with Ultrahigh Capacity and Ultrafast Color Tunability

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Reduced graphene oxide-mediated synthesis of Mn₃O₄ nanomaterials for an asymmetric supercapacitor cell