Wearable supercapacitors based on graphene nanoplatelets/carbon nanotubes/polypyrrole composites on cotton yarns electrodes

Abstract

The development of highly conductive, flexible, mechanical reinforced and chemically modified cotton yarns for electrodes of supercapacitors represents an important advance in the energy storage devices applied in wearable electronics. The production of carbon-based conductive layers as supports for chemical polymerization of active polymeric materials (such as polypyrrole) is an important strategy that associates the high electrical double-layer capacitance of the carbon derivatives (carbon nanotubes and graphene nanoplatelets) and the pseudocapacitance of the polypyrrole in truly flexible devices with improved electrochemical response-high capacitance. These properties are affected by relative concentration of graphene nanoplatelets in carbon complexes due to the variation in overall conductivity of electrodes (in consequence of low aggregation degree and available surface area) and the electrochemical properties of the resulting devices that reaches capacitance in order of 45.5 F g −1 with a capacitive retention of 70% after 2000 cycles of use. These promising results open possibilities for new systems in wearable electronics.

Synthesis, characterization and dielectric studies of poly(1-naphthylamine)–tungsten disulphide nanocomposites

“…For miniaturized electronic devices, materials with exceptional dielectric properties are required [25][26][27][28]. IGA based dielectrics and capacitors are attractive due to their ease of synthesis, low cost and high stability.…”

Recent Progress in Textile-Based Flexible Supercapacitor

“…The electrochemical performance of the prepared flexible supercapacitor is better than CNT/polypyrrole composite-based flexible supercapacitor. Further, varying relative proportions of GNP/CNT ratio also improved the electrochemical performance of as-prepared flexible supercapacitor (Lima et al, 2019).…”

“…In addition, the incorporation of stretchable electrodes having improved electrochemical performance of power/energy density must be focused for tangible outcomes. Low energy density observed in wearable textile-based flexible supercapacitors can be well addressed by extending the working potential window, which can be done by exploring new and improved electrolytes, whereas, appropriate chemical modification of electrode can enhance specific capacitance of textile-based flexible supercapacitor (Lima et al, 2019). Preparation of ameliorated conducting polymer composite having superior and tunable conductivities and flexibility is a feasible key factor in bringing about desired and improved electrochemical characteristics in textile-based flexible supercapacitor (Le et al, 2017).…”

“…Rapid development in modern digital communication, smart electronic devices for healthcare and wearable applications have augmented demand toward the formulation and design of improved and better flexible energy storage systems. To further enhance the characteristics of a supercapacitor, extensive efforts have been dedicated to the facile fabrication of supercapacitors with advanced materials (Lima et al, 2019).…”

Enhancement in the tribological properties of Cr/DLC multilayers in methane: structural transformation induced by sliding

“…Heretofore, carbon, as an element, has provided lots of possibilities for production and design of devices, both macro and micro, to exploit in a wide range of applications [5][6][7][8]. Coatings containing carbon (both a primary or secondary constituent) were also applied in many fields [9][10][11]. Particularly, carbon-based films, such as diamond and diamond-like carbon (DLC), exhibit high thermal conductivity, chemical inertness and exceptional mechanical properties.…”