Solvent-aided direct adhesion of a metal/polymer joint using micro/nano hierarchical structures

Jun, Gyosik; Lee, Jeong‐Won; Shin, Younghun; Kim, Kihwan; Hwang, Woonbong

doi:10.1016/j.jmatprotec.2020.116744

Cited by 25 publications

(14 citation statements)

References 18 publications

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“…In addition, since DCM can evaporate completely and faster than water, the electrodeposited polymer films can form better mechanical interlocking with the gold surface. 44 Therefore, based on the above-mentioned results on the specific capacitance, electrochemical stability, and adherence to the substrate, we selected PEDOTOH:ClO 4 fabricated in DCM using the potentiostatic mode as the best performing polymer electrode for further investigation toward the potential applicability into supercapacitor devices.…”

Section: No Materialsmentioning

confidence: 99%

Hydroxymethyl PEDOT microstructure-based electrodes for high-performance supercapacitors

et al. 2022

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The development of conducting polymer-based supercapacitors offers remarkable advantages, such as good ionic and electronic conductivity, ease of synthesis, low processing cost, and mechanical flexibility. 3,4-ethylenedioxythiophene (PEDOT) is a conducting polymer with robust chemical and environmental stability during storage and operation in an aqueous environment. Yet, improving its electrochemical capacitance and cycle life remains a challenge for high-performance supercapacitors exceeding the current state-of-the-art. The fabrication of PEDOT composites with carbon nanomaterials and metal oxides is the commonly used approach to enhance capacitance and stability. This work discusses a comparative study to fabricate highly stable PEDOT derivative electrodes with remarkable specific capacitance via a straightforward electrochemical polymerization technique. The hydroxymethyl PEDOT (PEDOTOH) doped with perchlorate in a dichloromethane (DCM) solvent (197 F g−1) exhibits superior performance compared to the polymer formed in an aqueous solution (124 F g−1). Furthermore, the electropolymerized PEDOTOH on flexible Au/Kapton substrates was assembled into a free-standing symmetrical supercapacitor in an agarose additive-free gel. The use of agarose gel electrolytes can offer easy handling, no leakage, moderate ionic conductivity, and flexibility for miniaturization and integration. The supercapacitor reached a specific capacitance of 36.96 F g−1 at a current density of 13.7 A g−1, an energy density of 14.96 Wh kg−1, and a power density of 22.2 kW kg−1 among the highest values reported for PEDOT-based supercapacitors. The self-standing supercapacitor achieves an industry-par capacitance retention of ∼98% after 10000 charge/discharge cycles at 10 A g−1. This study provides insights into the effect of solvents and electropolymerization modes on the polymer structure and its electrochemical properties toward high-performance supercapacitor devices.

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Section: No Materialsmentioning

confidence: 99%

Hydroxymethyl PEDOT microstructure-based electrodes for high-performance supercapacitors

et al. 2022

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“…The chemical reaction of the adhesive creates covalent and hydrogen bonds, resulting in durable bonding. However, this bonding process is limited to certain materials owing to chemical affinities; moreover, it may be complicated and harmful. − In lieu of chemical bonding, physical bonding involving microstructures and nanostructures created on metal surfaces has been proposed to enhance metal–polymer adhesion. − First, molten polymer fills the formed structures; subsequently, the hardened polymer forms metal–polymer joints through mechanical interlocking. To form strong joints, mechanical interlocking should be improved.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Steel Sandwich Sheet Adhesion Using Mechanical Interlocking Structures Formed by Electrochemical Etching

Kim

Yoo

et al. 2021

Langmuir

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Steel sandwich sheets (steel−polymer−steel), which are composed of lightweight polymers bonded on both sides with rigid steel sheets, have recently been developed as functional lightweight materials. In this study, a steel sandwich sheet (electrogalvanized (EG) steel sheet−polypropylene (PP)−EG steel sheet) with improved normal adhesion is fabricated without adhesives. Instead, adhesion is achieved via mechanical interlocking between the etched EG steel sheets and PP. Hierarchical structures were formed on the EG steel sheet surface by electrochemical etching to attain effective mechanical interlocking for improving normal adhesion without any adhesives. In the case of the EG steel sheet etched at 6 V for 7 s, a high fraction (∼35%) of holes (size: <1 μm 2 ) with nanoscale scalloped structures was formed on the EG steel sheet surface. The normal adhesion test result of the fabricated steel sandwich sheet showed that the adhesion strength increased from virtually 0 (bare) to 559.6 kPa as a result of mechanical interlocking. The results of the focused ion beam−scanning electron microscopy and energy-dispersive spectrometry analyses confirmed the cohesive failure of PP resulting from the successful mechanical interlocking of PP with the holes formed on the etched EG steel sheet. To examine the effect of hierarchical structures on the normal adhesion of the steel sandwich sheet, finite element analysis was implemented.

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“…[48][49][50] Compared to these conventional methods, direct bonding has been considered as an effective way to manufacture metal/polymer structures. [51][52][53] Among direct joining methods, hot pressing has emerged as an outstanding alternative. [54][55][56] The fact that it can be applied to various material combinations 57,58 without any extra supplement as a timesaving and low-cost process makes this method highly practicable.…”

Section: Introductionmentioning

confidence: 99%

Directly bonded single lap joints of SiCp/AA2124 composite with glass fiber-reinforced polypropylene: Hole drilling effects on lap shear strength and out-of-plane impact response

Öztoprak

2021

Journal of Composite Materials

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Joining dissimilar materials to achieve lightweight design and energy efficiency has been increasingly popular. A joint formed by components of particle-reinforced metal and polymer matrix composite combines the merits of both materials. This paper is mainly focused on the research of the tensile lap shear and impact behavior of the dissimilar single-lap joints (SLJs) between SiCp/AA2124 composite and glass fiber-reinforced polypropylene (PP). The effects of out-of-plane loading applied from different surfaces of SLJs on impact responses are evaluated. Hot pressing technique is introduced to manufacture metal/polymer assembly without using any adhesive. The hole drilling effect is investigated with the idea that it may provide weight reduction and also increase the strength of the dissimilar SLJs. The results indicate that the dissimilar SLJs show more Charpy impact strength when the impact is performed on the metal-matrix composite (MMC). Mechanical properties of SLJs are adversely affected by a drilled hole in the MMC adherend.

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Solvent-aided direct adhesion of a metal/polymer joint using micro/nano hierarchical structures

Cited by 25 publications

References 18 publications

Hydroxymethyl PEDOT microstructure-based electrodes for high-performance supercapacitors

Hydroxymethyl PEDOT microstructure-based electrodes for high-performance supercapacitors

Enhancement of Steel Sandwich Sheet Adhesion Using Mechanical Interlocking Structures Formed by Electrochemical Etching

Directly bonded single lap joints of SiCp/AA2124 composite with glass fiber-reinforced polypropylene: Hole drilling effects on lap shear strength and out-of-plane impact response

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