Flexible supercapacitors on chips with interdigital carbon nanotube fiber electrodes

Xi, Shuaipeng; Kang, Yanru; Qu, Shengxiang; Han, Shuaishuai

doi:10.1016/j.matlet.2016.03.143

Cited by 29 publications

(10 citation statements)

References 23 publications

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“…Although different commercial devices already exist, there are still many scientific and technological challenges in the supercapacitor research area, mainly with respect to increasing the amount of stored energy [2]. Given their suitable characteristics for supercapacitor electrode application, carbon materials have received the most attention and they are the most widely used in this application [3][4][5][6][7][8][9][10][11][12]. Within carbon materials, carbon fibres (CF) have special characteristics when compared with other carbon materials [13].…”

Section: Introductionmentioning

confidence: 99%

Supercapacitor Electrode Based on Activated Carbon Wool Felt

Pina

Amaya

Marcuzzo

et al. 2018

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An electrical double-layer capacitor (EDLC) is based on the physical adsorption/desorption of electrolyte ions onto the surface of electrodes. Due to its high surface area and other properties, such as electrochemical stability and high electrical conductivity, carbon materials are the most widely used materials for EDLC electrodes. In this work, we study an activated carbon felt obtained from sheep wool felt (ACF'f) as a supercapacitor electrode. The ACF'f was characterized by elemental analysis, scanning electron microscopy (SEM), textural analysis, and X-ray photoelectron spectroscopy (XPS). The electrochemical behaviour of the ACF'f was tested in a two-electrode Swagelok ®-type, using acidic and basic aqueous electrolytes. At low current densities, the maximum specific capacitance determined from the charge-discharge curves were 163 F•g −1 and 152 F•g −1 , in acidic and basic electrolytes, respectively. The capacitance retention at higher current densities was better in acidic electrolyte while, for both electrolytes, the voltammogram of the sample presents a typical capacitive behaviour, being in accordance with the electrochemical results.

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Section: Introductionmentioning

confidence: 99%

Supercapacitor Electrode Based on Activated Carbon Wool Felt

Pina

Amaya

Marcuzzo

et al. 2018

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“…As a sort for potential energy storage devices, supercapacitors have much more advantages than traditional energy storage technology, such as high specific power, persistent cycle life, fast charge, and discharge speed 1,2 . However, their low energy density prevents them from being widely used 3,4 . Researchers try to explore the energy storage mechanism and new materials to enhance the energy density of supercapacitors 5‐11 .…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of porous structure and heteroatoms in carbon materials to boost high‐performance supercapacitor

et al. 2021

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Summary In this work, the porous carbon (PC) materials with nitrogen and sulfur atoms doping (PC‐NS) are prepared by KOH activation and a hydrothermal process. Among them, the biomass (fig seeds) is used as carbon precursors, the KOH etching process is controlled to optimize pores of PC‐NS materials; the hydrothermal reactions introduce nitrogen and sulfur atoms to modify the carbon materials. Results show that the PC‐NS‐3 (the ratio of fig seeds to KOH is 4:5) electrode has excellent capacitance data performance (189 F g−1 at 1 A g−1 and retains 51.9% at 80 A g−1). At the same time, it also has a stable cycling performance (almost no attenuation after 50 000 cycles at 40 A g−1). The PC‐NS‐3 assembled symmetrical device delivers an energy density of 9.6 Wh kg−1, when the power density is 699.5 W kg−1. In addition, it delivers a maximum power density of 53.8 kW kg−1, when the energy density is 3.5 Wh kg−1. The excellent electrochemical behavior of PC‐NS‐3 electrode can attribute to the synergistic effect of optimal pore distribution and heteroatoms doping.

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“…9 Supercapacitors that store energy electrostatically (non-faradaic) are known as electrochemical double-layer capacitors (EDLCs). 10 Generally, the EDLC electrodes are made of carbonaceous materials, like activated carbon, 11 carbon nanotubes, 12,13 and graphene. 14,15 These materials have a porous structure with large specific areas, generating high interfacial capacitances.…”

Section: Introductionmentioning

confidence: 99%

High‐performance symmetric supercapacitor based on molybdenum disulfide/poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) composite electrodes deposited by spray‐coating

2021

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Here we present the study of supercapacitors based on molybdenum disulfide and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (MoS 2 /PEDOT: PSS) composite electrodes deposited by spray-coating. To produce the MoS 2 / PEDOT:PSS composite ink, dispersions of hydrothermally synthesized MoS 2 and PEDOT:PSS were mixed in different weight proportions. Electrodes containing only PEDOT:PSS and MoS 2 were also fabricated for comparison. The composite films were deposited by transferring the as-prepared inks to an airbrush coupled to a modified 3D printer base with in-line displacement. The films were characterized in terms of the scanning electron microscope (SEM), Raman spectroscopy, and sheet resistance. The electrochemical properties of supercapacitors were evaluated by cyclic voltammetry (CV), galvanostatic charge/discharges (GCD) techniques, impedance spectroscopy (IS), and their correlated parameters. The maximum specific capacitance of the MoS 2 -basedsupercapacitor was estimated to be 145.9 F g −1 at 1 mV s −1 , while the 3:1 MoS 2 /PEDOT:PSS weight ratio supercapacitor exhibited a specific capacitance of 131.1 F g −1 . Despite the slightly lower C SP , the 3:1 device provided a better overall performance, with a remarkably higher energy density of 11.2 Wh kg −1 and a maximum power density of 1020 W kg −1 . It also displayed better longterm cycle stability, retaining 92% of its initial capacitance after 1000 CV cycles (against 54% of MoS 2 devices). In summary, we demonstrated the study and production of a high-performance supercapacitor with spray-deposited MoS 2 / PEDOT:PSS composite electrodes, in which the production can be easily scalable for mass production and practical applications.

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Flexible supercapacitors on chips with interdigital carbon nanotube fiber electrodes

Cited by 29 publications

References 23 publications

Supercapacitor Electrode Based on Activated Carbon Wool Felt

Supercapacitor Electrode Based on Activated Carbon Wool Felt

Synergistic effect of porous structure and heteroatoms in carbon materials to boost high‐performance supercapacitor

High‐performance symmetric supercapacitor based on molybdenum disulfide/poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) composite electrodes deposited by spray‐coating

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