Hierarchically porous carbon microfibers for solid-state supercapacitors

Chen, Xiuyan; Mi, Hongyu; Ji, Chenchen; Lei, Chenchen; Fan, Zuizui; Yu, Chang; Sun, Luyi

doi:10.1007/s10853-020-04376-1

Cited by 10 publications

(3 citation statements)

References 71 publications

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“…Figure c exhibits the GCD curves tested at various current densities, the calculated specific capacitances of the cell are 55.8, 51.3, 46.9, 40.7, 36.3, and 32.3 F g –1 at 1, 2, 4, 5, 10, 15, and 20 A g –1 , respectively. The Ragone plot of the cell is shown in Figure d, the maximum energy density can reach 15.2 W h kg –1 at 700 W kg –1 , which is beyond those carbon-based solid-state capacitors that are recently reported. − In addition, even at a high power density of 14 kW kg –1 , the energy density can still maintain 8.8 W h kg –1 . The inset shows that five red LEDs can be lightened by three symmetric capacitors.…”

Section: Results and Discussionmentioning

confidence: 77%

Nitrogen-Doped Carbon Derived from Deep Eutectic Solvent as a High-Performance Supercapacitor

Wang

Guo

et al. 2021

ACS Appl. Energy Mater.

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As a kind of ionic fluid, deep-eutectic solvent (DES) has been used not only as a solvent but also as a precursor for carbon preparation in recent years. Herein, porous nitrogen-doped carbon (NC) has been prepared via simple pyrolysis of l-tyrosine-based DES. The effects of the proportion of the components in DES and the carbonization temperature on the morphology, pore structure, chemical composition, and the performance for supercapacitor application have been investigated. The as-prepared NCs show large surface areas, high nitrogen contents, hierarchical porous structures, and excellent capacitive performances. Specifically, the optimized sample exhibits a higher specific capacitance (306.5 F g–1), better rate capability (70.3% at 50 A g–1), and also shows high area capacitance (7.1 F cm–2) and specific capacitance (235.8 F g–1) when 30 mg/cm2 of the sample is loaded. The constructed symmetric supercapacitor attains a high energy density of 16.9 W h kg–1 (at 450 W kg–1) in the neutral electrolyte and outstanding cycling stability of 100% retention after 50,000 cycles. Moreover, the fabricated symmetrical solid KOH/poly(vinyl alcohol) supercapacitor displays a superior energy density of 15.2 W h kg–1 at 700 W kg–1 and can retain 8.8 W h kg–1 at 14 kW kg–1. Our work presents a route for the synthesis of porous carbon using DES as the carbonaceous precursor and also demonstrates its possible application in energy storage.

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Section: Results and Discussionmentioning

confidence: 77%

Nitrogen-Doped Carbon Derived from Deep Eutectic Solvent as a High-Performance Supercapacitor

Wang

Guo

et al. 2021

ACS Appl. Energy Mater.

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“…For supercapacitive performance, a material with a high specific surface is favorable for achieving a high specific capacitance value. 20 To investigate the nature of porosity and accurate information regarding the specific surface area of m- NTTO, N 2 adsorption−desorption isotherms were recorded at 77 K (Figure 1b) showing a type IV N 2 adsorption−desorption isotherm with H 3 type hysteresis loop 61 as per the IUPAC. A sharp increase in volume adsorbed at low relative pressure (inset, Figure 1b) (P/P o < 0.02), indicates the presence of plenty of micropores whereas the H 3 type hysteresis loop indicates the presence of mesopores.…”

Section: Resultsmentioning

confidence: 99%

Mescoporous Nickel Titanate–Titanium Oxide Complex Material for Enhanced Energy Storage Application

et al. 2023

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Materials need to be engineered to make them device-ready. A mescoporous, a combination of meso-and microporous, nickel titanate−titanium oxide (m-NTTO) complex has been synthesized here using a simple sol−gel method for making a solid-state binder-free supercapacitor from the as-prepared powder. The m-NTTO sample, well characterized using electron microscopy, N 2 adsorption−desorption isotherm, X-ray diffraction, and Raman spectroscopy was tested for its energy storage capabilities. The supercapacitive performance of m-NTTO is investigated through cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge−discharge (GCD). It shows a dominant electric double-layer capacitance with a total specific capacitance of 195 F/g at 10 mV/s and fast charging and slow discharging. Additionally, it exhibits high specific capacitance, excellent cyclic stability, and high retention. Using this sample, a prototype solid-state symmetric supercapacitor device has been fabricated to demonstrate excellent electrochemical performance with high specific capacitance, energy density, and power density was obtained, which suggests that the m-NTTO is suitable candidate material for energy storage application.

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“…The average particle size of NTTO was calculated from the SEM micrograph (Figure a) using ImageJ software (inset, Figure a) showing that the particles are 20–25 nm in size, which can be said to be zero-dimensional nanoparticles. To further understand the porous nature, the N 2 adsorption–desorption isotherm was recorded at 77 K (Figure S1, Supporting Information) which shows a type IV curve with H3 type hysteresis loop indicating the presence of micropores in the material. The pore size distribution (PSD) curve (inset in Figure S1, Supporting Information) indicates that the average pore size lies in the range of 1.5 to 3.5 nm.…”

Section: Resultsmentioning

confidence: 99%

Exploiting Charge Storage Capabilities of NiTiO₃/TiO₂ for Achieving the Most Efficient Hybrid Electrochromic Device

Bansal

Ghosh

Kandpal

et al. 2022

ACS Appl. Eng. Mater.

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Discovering materials and device fabrication recipes is essential for achieving the best performing electronic devices. The nickel titanate titanium oxide (NTTO) complex, synthesized using a simple sol–gel technique, has been explored for designing the best performing electrochromic device when the film of NTTO (in polymer gel) is used in combination with polythiophene. The electrochemical studies of NTTO reveal that more than 80% of the charge stored is an electric double layer capacitive (EDLC) type property, which has been exploited in the electrochromic device where it is expected that the stored charge in the NTTO film can be made available to the electrochromic layer for efficient performance. The device shows a short switching time of 0.8s under an external bias of ±1.6 V with a power efficiency of ∼1055 cm2/C, which makes this device suitable for real life electrochromic applications.

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Hierarchically porous carbon microfibers for solid-state supercapacitors

Cited by 10 publications

References 71 publications

Nitrogen-Doped Carbon Derived from Deep Eutectic Solvent as a High-Performance Supercapacitor

Nitrogen-Doped Carbon Derived from Deep Eutectic Solvent as a High-Performance Supercapacitor

Mescoporous Nickel Titanate–Titanium Oxide Complex Material for Enhanced Energy Storage Application

Exploiting Charge Storage Capabilities of NiTiO₃/TiO₂ for Achieving the Most Efficient Hybrid Electrochromic Device

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Hierarchically porous carbon microfibers for solid-state supercapacitors

Cited by 10 publications

References 71 publications

Nitrogen-Doped Carbon Derived from Deep Eutectic Solvent as a High-Performance Supercapacitor

Nitrogen-Doped Carbon Derived from Deep Eutectic Solvent as a High-Performance Supercapacitor

Mescoporous Nickel Titanate–Titanium Oxide Complex Material for Enhanced Energy Storage Application

Exploiting Charge Storage Capabilities of NiTiO3/TiO2 for Achieving the Most Efficient Hybrid Electrochromic Device

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Exploiting Charge Storage Capabilities of NiTiO₃/TiO₂ for Achieving the Most Efficient Hybrid Electrochromic Device