Highly Stretchable and Conductive Silver Nanoparticle Embedded Graphene Flake Electrode Prepared by In situ Dual Reduction Reaction

Abstract

The emergence of stretchable devices that combine with conductive properties offers new exciting opportunities for wearable applications. Here, a novel, convenient and inexpensive solution process was demonstrated to prepare in situ silver (Ag) or platinum (Pt) nanoparticles (NPs)-embedded rGO hybrid materials using formic acid duality in the presence of AgNO3 or H2PtCl6 at low temperature. The reduction duality of the formic acid can convert graphene oxide (GO) to rGO and simultaneously deposit the positively charged metal ion to metal NP on rGO while the formic acid itself is converted to a CO2 evolving gas that is eco-friendly. The AgNP-embedded rGO hybrid electrode on an elastomeric substrate exhibited superior stretchable properties including a maximum conductivity of 3012 S cm-1 (at 0 % strain) and 322.8 S cm-1 (at 35 % strain). Its fabrication process using a printing method is scalable. Surprisingly, the electrode can survive even in continuous stretching cycles.

Synthesis and Characterisation of Reduced Graphene Oxide/Bismuth Composite for Electrodes in Electrochemical Energy Storage Devices

“…Over the temperature 450 to 800 °C rGO/Bi has a smaller weight loss compared with rGO. This might be because by adding the bismuth nanoparticles, the rGO/Bi has better graphitization and de‐oxygenation with enhanced van der Waals interactions between layers …”

“…This might be because by adding the bismuth nanoparticles, the rGO/Bi has better graphitizationa nd de-oxygenation with enhanced van der Waals interactions between layers. [40] Based on the 5.13 %weightgain (peak P5), bismuth and rGO have aw eight ratio of 0.44:0.56. This is in good agreement with the atomic ratio given by XPS (bismuth and carbon were found by XPS to have an atomic ratio of 0.03:0.78, as discussed above,w hich corresponds to aweightratio of 0.4:0.6).…”

Recent Progress on Stretchable Electronic Devices with Intrinsically Stretchable Components

“…These materials are promising for applications in medicine, optoelectronics, and energy‐storage devices that require electro‐tunable properties. In recent reports, stretchable conducting thick films have been used to integrate LED lights as a proof‐of‐concept application . Lee et al developed a PEDOT:PSS–polyacrylamide (PAAm) organogel as a strain‐insensitive conductor.…”

Rational design and observation of the tight interface between graphene and ligand protected nanocrystals

“…As a model, heterostructures of graphene and silver (Ag) nanocrystals are studied because of their potential applicability in highperformance conductors and catalysts. 21 We quantitatively compare the binding energy on the Ag surface of graphene and poly vinylpyrollidone (PVP), which is widely used ligands for metal nanocrystals (Fig. 1).…”