Coaxial Ag–base metal nanowire networks with high electrochemical stability for transparent and stretchable asymmetric supercapacitors

Park, Sangbaek; Tan, Alvin Wei Ming; Wang, Jiangxin; Lee, Pooi See

doi:10.1039/c7nh00024c

Cited by 65 publications

(53 citation statements)

References 47 publications

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Section: Graphene-based Stecmentioning

confidence: 99%

“…[85] Furthermore, our group synthesized Ag@Ni core-shell structures and found that percolated Ag@Ni NW networks showed reversible stretchability and good electrochemical stability in stretchable transparent supercapacitors. [47] Therefore, further ongoing effort is necessary to develop the highly stable Ag NW-based STECs for various soft energy device applications.…”

Section: Metal Nw-based Stecmentioning

confidence: 99%

“…The Ag-Ni NWs (+) //Ag-Fe NWs (−) asymmetric supercapacitor with PVA/KOH gel electrolyte could be operated at 1.6 V and maintained 92% of its original capacitance during 5000 cycles even after stretching to 35% strain (Figure 12c). Moreover, as a prototype of the stretchable [47] Copyright 2017, Royal Society of Chemistry. transparent asymmetric supercapacitor, the micropatterned device was designed so that each electrode only covers 50% of the entire area in the device and exhibited area-specific capacitances of 1.48 mF cm −2 with stable stretchability up to 20% strain (Figure 12d).…”

Section: Supercapacitorsmentioning

confidence: 99%

“…[197] As a proof of concept, Park et al reported stretchable transparent asymmetric supercapacitors with a 1.6 V operating voltage based on Ag-Ni and Ag-Fe core-shell NW electrodes. [47] The core-shell structure where the welded Ag NW networks is thoroughly covered with Ni or Fe nanoshells was fabricated by electrodeposition and transferred into polyurethane acrylate elastomers for the application to STECs (Figure 12a). Ag-Ni and Ag-Fe electrodes exhibited high electrochemical stability in aqueous potassium hydroxide (KOH) electrolyte and provided area-specific capacitances of ≈3 mF cm −2 by surface Faradaic reactions of metal oxide/hydroxide layer (Figure 12b).…”

Section: Supercapacitorsmentioning

confidence: 99%

“…Conventionally, indium tin oxide (ITO) film is a ubiquitous transparent electrode of optoelectronics due to excellent sheet resistance and transparency (10 Ω sq −1 at 90% transmittance), but its brittleness by ceramic nature limits its further application to deformable devices. [53,54] Therefore, potential alternative materials have been extensively studied for ST electrodes, including CNTs, [55][56][57][58][59][60][61][62][63] graphene, [64][65][66][67][68][69] metallic NWs, [16,36,47, metallic grid/nanostructure, [94][95][96][97][98][99][100] conducting polymers, [52,[101][102][103][104][105][106][107] and hybrid composites. [39,[108][109][110][111][112][113][114] The performances of STECs are summarized in Table 1.…”

Section: Stecsmentioning

confidence: 99%

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Deformable and Transparent Ionic and Electronic Conductors for Soft Energy Devices

Park

Parida

Lee

2017

Advanced Energy Materials

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The recent boom in deformable or stretchable electronics, flexible transparent displays/screens, and their integration into the human body has facilitated the development of multifunctional energy devices that are stretchable, transparent, wearable, and/or biocompatible while meeting the energy or power requirements. The development of soft energy systems begins with the preparation of relevant conductors and the design of innovative device configurations. In this study, recent advances and trends in stretchable and transparent electronic and ionic conductors are reviewed coupled with the growing efforts to use them for soft energy storage and conversion systems. Stretchable transparent ionic conductors present possibilities for use as current collectors and electrolytes in soft electronic/energy devices, providing novel insight into biofriendly systems for an effective human–machine interaction. Moreover, representative examples that demonstrate soft energy devices based on stretchable transparent ionic/electronic conductors are discussed in detail. Furthermore, the challenges and perspectives of developing novel stretchable transparent conductors and device configurations with tailored features are also considered.

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Section: Graphene-based Stecmentioning

confidence: 99%

Section: Metal Nw-based Stecmentioning

confidence: 99%

Section: Supercapacitorsmentioning

confidence: 99%

Section: Supercapacitorsmentioning

confidence: 99%

Section: Stecsmentioning

confidence: 99%

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Deformable and Transparent Ionic and Electronic Conductors for Soft Energy Devices

Park

Parida

Lee

2017

Advanced Energy Materials

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A Micromolding Method for Transparent and Flexible Thin‐Film Supercapacitors and Hybrid Supercapacitors

Liu

Yan

Huang

et al. 2020

Adv Funct Materials

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Thin-film supercapacitors are promising candidates for energy storage in wearable electronics due to their mechanical flexibility, high power density, long cycling life, and fast-charging capability. In addition to all of these features, device transparency would open up completely new opportunities in wearable devices, virtual reality or in heads-up displays for vehicle navigation. Here a method is introduced for micromolding Ag/porous carbon and Ag/ Ni x Fe y O z @reduced graphene oxide (rGO) into grid-like patterns on polyethylene terephthalate foils to produce transparent thin-film supercapacitors and hybrid supercapacitors. The supercapacitor delivers a high areal capacitance of 226.8 µF cm −2 at a current density of 3 µA cm −2 and with a transparency of 70.6%. The cycling stability is preserved even after 1000 cycles under intense bending. A hybrid supercapacitor is additionally fabricated by integrating two electrodes of Ag/porous carbon and Ag/Ni x Fe y O z @rGO. It offers an areal capacitance of 282.1 µF cm −2 at a current density of 3 µA cm −2 , a transparency of 73.3% and the areal capacitance only decreases slightly under bending. This work indicates that micromolding of nano-and micro-sized powders represents a powerful method for preparing regular electrode patterns, which are fundamental for the development of transparent energy storage devices.

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A Tailorable Spray‐Assembly Strategy of Silver Nanowires‐Bundle Mesh for Transferable High‐Performance Transparent Conductor

Xiong

Ciou

et al. 2020

Adv Funct Materials

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Achieving a well tradeoff between electrical and optical performances remains challenging for conventional silver nanowires (AgNWs) random network conductors. An innovative AgNW‐bundle mesh (AgBM) composed of exquisite knots and abundant open area is realized by one‐step spray‐assembly at room temperature, showing high optoelectronic performance. A dynamic assembly mechanism based on the spray assembly of isopropanol‐based AgNWs ink is revealed, ensuring a favorable coffee‐ring effect dominated by the capillary flow rather than Marangoni reflux, driving the AgNWs to deposit at the edges of droplets. The initially formed AgNW‐bundle rings serve as template to constrain the movement of AgNWs from the subsequent droplets, rendering scalable and continuous accumulation of nanowires to produce a connective AgBM. The controlling factors of surface tension of substrates and ink, wettability, spreading and pinning effect of the ink droplets, as well as tunable assembly driving force determined by spraying rate are revealed, realizing an universal spray‐assembly strategy for tailorable fabrication of AgBMs using AgNWs with different sizes in diameter (20–120 nm) and length (20–200 µm). Thicker AgBMs could reduce the sheet resistance without severe sacrifice of transparency. Thinner AgNW‐bundles/knots with better electrical connection can be realized from the finer and longer AgNWs, delivering higher optoelectronic performance.

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Coaxial Ag–base metal nanowire networks with high electrochemical stability for transparent and stretchable asymmetric supercapacitors

Abstract: Based on electrochemically stable Ag–Ni and Ag–Fe core–shell nanowire networks, a transparent and stretchable asymmetric supercapacitor was demonstrated.

Cited by 65 publications

References 47 publications

Deformable and Transparent Ionic and Electronic Conductors for Soft Energy Devices

Deformable and Transparent Ionic and Electronic Conductors for Soft Energy Devices

A Micromolding Method for Transparent and Flexible Thin‐Film Supercapacitors and Hybrid Supercapacitors

A Tailorable Spray‐Assembly Strategy of Silver Nanowires‐Bundle Mesh for Transferable High‐Performance Transparent Conductor

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