Stretchable and transparent supercapacitors based on extremely long MnO2/Au nanofiber networks

Lee, Yein; Chae, Sanghak; Park, Hyeji; Kim, Juhyeon; Jeong, Soo‐Hwan

doi:10.1016/j.cej.2019.122798

Cited by 41 publications

(18 citation statements)

References 64 publications

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“…We attempted the MnO 2 coating on the Ag NW and the AACS NW network electrodes using the same electroplating process. The input voltage was kept at 1.5 V for 1 min, and a mixture of Mn(NO 3 ) 2 (20 mM, 50 mL) aqueous solution and NaNO 3 (100 mM, 50 mL) aqueous solution was used as a plating solution [ 24 ]. We examined the changes in the appearance and the electrical conductivity of the electrodes before and after the electroplating process, as shown in Figure S6a .…”

Section: Resultsmentioning

confidence: 99%

Electrodeposition of the MnO2 on the Ag/Au Core–Shell Nanowire and Its Application to the Flexible Supercapacitor

Seo

Kim

et al. 2021

Materials

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Supercapacitors have received considerable attention as energy storage devices owing to their high power density, fast charge/discharge rate, and long cyclic life. Especially with an increasing demand for flexible and wearable devices, research on flexible supercapacitors has surged in recent years. The silver nanowire (Ag NW) network has been used as a flexible electrode owing to its excellent mechanical and electrical properties; however, its use as an electrode for flexible supercapacitors has been limited due to insufficient electrochemical stability. In this study, we proposed a method to resolve this issue. We employed a solution process that enabled the coating of the surface of Ag NW by a thin Au shell of ≈ 5 nm thickness, which significantly improved the electrochemical stability of the Ag NW network electrodes. Furthermore, we confirmed for the first time that MnO2, which is one of the most widely used capacitive materials, can be directly electroplated on the AACS NW network electrode. Finally, we fabricated a high-performance and flexible solid-state supercapacitor using the suggested Ag/Au/MnO2 core–shell NW network electrodes.

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Section: Resultsmentioning

confidence: 99%

Electrodeposition of the MnO2 on the Ag/Au Core–Shell Nanowire and Its Application to the Flexible Supercapacitor

Seo

Kim

et al. 2021

Materials

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“…(1) Carbonaceous materials include CNTs, graphene, and its allotrope, where graphene is mainly based on double-layer capacitance, which utilizes only the surface of the electrode material; however, the capacitance of bare carbonaceous will be relatively small, limiting the applications of supercapacitors. (2) Metal oxides, especially Ni oxide, Co oxide, Mn oxide, and Co oxide, include MnO 2 [12], NiO, Co 3 O 4 , and Co(OH) 2 [13], and these metals have many energy levels [41], which can easily absorb and emit some electrons. Furthermore, the power density of these metal oxides is the largest among all active materials; however, they have shown poor high cycle and charge abilities, as well as environmental pollution.…”

Section: Active Materialsmentioning

confidence: 99%

Supercapacitors: Fabrication Challenges and Trends

Su¹

2023

Updates on Supercapacitors

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Supercapacitors have shown great potential as important complements to batteries. We first describe the principle of supercapacitors, including the categories and the main components of supercapacitors. In the second part, we compare the advantages of supercapacitors with other energy storage devices, and then the power densities of active materials are compared with each other. In the third part, we show how various technologies are used to fabricate electrodes and supercapacitors. In the last part, several applications are presented, showing the high value of supercapacitors, including hybrid vehicles, solar cells, and wearable and portable devices.

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“…This method is superior because it obviates the need for a conductive metal oxide coating, enabling the fabrication of current collector-free supercapacitor electrodes on any glass surface. In previous studies, transparent electrode fabrication often involves a trade-off between transparency and functionality. ,,− We circumvent this issue by localizing a PEDOT coating to the edge of a glass substrate, enabling the assembly of a proof-of-concept tandem supercapacitor. This approach retains the electrochemical performance of a PEDOT electrode without compromising the transparency of glass.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Poly(3,4-ethylenedioxythiophene) Coatings on Functionalized Glass for Energy Storage

Yang

Chow

Awoyomi

et al. 2023

ACS Appl. Mater. Interfaces

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Conducting polymers rise among some of the most promising transparent supercapacitor electrode materials due to high conductivity, environmental stability, light weight, and ease of synthesis. A major challenge for depositing conducting polymers on a glass substrate is the lack of molecular interactions between organic and inorganic moieties resulting in poor adhesion and low cycling stability of the electrode. We present a synthetic approach by covalently linking poly(3,4-ethylyenedioxythiophene) (PEDOT) and glass through Friedel–Crafts alkylation on a self-assembled diphenyldimethoxysilane monolayer. This method obviates the need for a conductive FTO or ITO coating, enabling the fabrication of current collector-free planar supercapacitor electrodes on any glass surface. The electrode produced from our vapor-phase synthesis is coated with a highly conductive nanofibrillar PEDOT film (sheet resistance 2.1 Ω/□) possessing a gravimetric capacitance of ∼200 F/g. Our PEDOT planar supercapacitor possesses outstanding stability (86% capacitance retention after 50,000 cycles). We also fabricate a proof-of-concept transparent tandem supercapacitor on PEDOT-coated glass using 3D-printed frames that supplies enough voltage and current to light up a blue light-emitting diode (LED).

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Stretchable and transparent supercapacitors based on extremely long MnO2/Au nanofiber networks

Cited by 41 publications

References 64 publications

Electrodeposition of the MnO2 on the Ag/Au Core–Shell Nanowire and Its Application to the Flexible Supercapacitor

Electrodeposition of the MnO2 on the Ag/Au Core–Shell Nanowire and Its Application to the Flexible Supercapacitor

Supercapacitors: Fabrication Challenges and Trends

Nanostructured Poly(3,4-ethylenedioxythiophene) Coatings on Functionalized Glass for Energy Storage

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