Printable Thin Film Supercapacitors Using Single-Walled Carbon Nanotubes

Abstract

Thin film supercapacitors were fabricated using printable materials to make flexible devices on plastic. The active electrodes were made from sprayed networks of single-walled carbon nanotubes (SWCNTs) serving as both electrodes and charge collectors. Using a printable aqueous gel electrolyte as well as an organic liquid electrolyte, the performances of the devices show very high energy and power densities (6 W h/kg for both electrolytes and 23 and 70 kW/kg for aqueous gel electrolyte and organic electrolyte, respectively) which is comparable to performance in other SWCNT-based supercapacitor devices fabricated using different methods. The results underline the potential of printable thin film supercapacitors. The simplified architecture and the sole use of printable materials may lead to a new class of entirely printable charge storage devices allowing for full integration with the emerging field of printed electronics.

Solution-Grown Silicon Nanowires for Lithium-Ion Battery Anodes

“…This may be due to improved electronic conductivity of the MWNT network compared to the CB, which has been previously observed. 46 Also, the MWNTs may improve the resiliency of the electrode and help to buffer the large volume changes. 41,47 Control tests on electrodes made from MWNTs and CMC only ( Figure S3, Supporting Information) showed stable reversible capacities of about 110 mAh/g, which is due to capaci- tance stored in the electrochemical double layer.…”

Extracting the Full Potential of Single‐Walled Carbon Nanotubes as Durable Supercapacitor Electrodes Operable at 4 V with High Power and Energy Density

“…At any discharge rate (power) the SWNT electrodes discharge more energy ( > 50 Wh kg − 1 at the power previously, [ 22 ] albeit using thinner electrodes (40 μ m), yet delivering lower power density (70 kW kg − 1 ).…”

Fabrication of large-area and high-crystallinity photoreduced graphene oxide films via reconstructed two-dimensional multilayer structures

“…In general, the shape of the CV loop also exhibits the Faradaic peak-incorporated rectangular shape, similar to that observed in the previous analysis, which indicates that the capacitance combined both the electric double-layer capacitance and the pseudocapacitance in the PRGO electrode. The specific capacitance of the graphene hydrogel film electrode estimated from the CV curves was 130 F g À1 , which is substantially higher than those of most of the previously reported solid-state devices made of carbon nanotubes (50-115 F g À1 ), 35,36 and graphene films (62-120 F g À1 ). [37][38][39] A long mechanical stability is an important concern for practical applications of flexible all-solid-state supercapacitors.…”