Temperature-independent capacitance of carbon-based supercapacitor from −100 to 60 °C

Xu, Jiang; Yuan, Ningyi; Razal, Joselito M.; Zheng, Yongping; Ding, Jianning; Cho, Kyeongjae; Ge, Shanhai; Zhang, Ruijun; Gogotsi, Yury; Baughman, Ray H.

doi:10.1016/j.ensm.2019.02.016

Cited by 111 publications

(82 citation statements)

References 32 publications

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“…The energy density of supercapacitors is governed by the operating voltage window ( V ) according to the energy ( E )–capacitance ( C ) relation, E = ½ CV 2 . CV and GCD curves in Figure a,b,d,e inform the EDLC behavior, in good agreement with the literature . This delivers very impressive EDLC capacities between 150 and 220 F g −1 at a high current density of 1.0 A g −1 along with rate performance.…”

Section: Resultssupporting

confidence: 86%

“…Such materials exhibit a wide range of porosities, with ultrahigh surface area being particularly targeted . These high porosities are achieved by simultaneously increasing the pore widths across several nanometers—commonly defined to be: microporosity, mesoporosity, and macroporosity respectively for pore widths of ≤2 nm, (2–50) nm, and ≥50 nm.…”

Section: Introductionmentioning

confidence: 99%

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Superior Multifunctional Activity of Nanoporous Carbons with Widely Tunable Porosity: Enhanced Storage Capacities for Carbon‐Dioxide, Hydrogen, Water, and Electric Charge

Gadipelli

Howard

Guo

et al. 2020

Advanced Energy Materials

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Nanoporous carbons (NPCs) with engineered specific pore sizes and sufficiently high porosities (both specific surface area and pore volume) are necessary for storing energy in the form of electric charges and molecules. Herein, NPCs, derived from biomass pine‐cones, coffee‐grounds, graphene‐oxide and metal‐organic frameworks, with systematically increased pore width (<1.0 nm to a few nm), micropore volume (0.2–0.9 cm3 g−1) and specific surface area (800–2800 m2 g−1) are presented. Superior CO2, H2, and H2O uptakes of 35.0 wt% (≈7.9 mmol g−1 at 273 K), 3.0 wt% (at 77 K) and 85.0 wt% (at 298 K), respectively at 1 bar, are achieved. At controlled microporosity, supercapacitors deliver impressive performance with a capacity of 320 and 230 F g−1 at 500 mA g−1, in aqueous and organic electrolytes, respectively. Excellent areal capacitance and energy density (>50 Wh kg−1 at high power density, 1000 W kg−1) are achieved to form the highest reported values among the range of carbons in the literature. The noteworthy energy storage performance of the NPCs for all five cases (CO2, H2, H2O, and capacitance in aqueous and organic electrolytes) is highlighted by direct comparison to numerous existing porous solids. A further analysis on the specific pore type governed physisorption capacities is presented.

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Section: Resultssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Superior Multifunctional Activity of Nanoporous Carbons with Widely Tunable Porosity: Enhanced Storage Capacities for Carbon‐Dioxide, Hydrogen, Water, and Electric Charge

Gadipelli

Howard

Guo

et al. 2020

Advanced Energy Materials

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“…77,78 Carbon nanotubes (CNTs) are large cylindrical carbon materials consisting of a hexagonal arrangement of sp 2 hybridized Fig. 3 Transmission electron micrographs (TEM) of various carbons with several dimensionalities for EDLCs: (a) OLCs, 94 (b) CNTs, 76 (c) graphene, 92 (d) ACs, 95 (e) CDCs, 65 and (f) TCs, 96 carbon atoms, which are formed by rolling up a single sheet of graphene (single-walled carbon nanotubes, SWCNTs) or by rolling up multiple sheets of graphene (multiwalled carbon nanotubes, MWCNTs). 79 To date, the commonly used synthesis techniques for CNTs are arc discharge, laser ablation, and chemical vapor deposition (CVD).…”

Section: High Surface Area Carbons For Edlc Electrodesmentioning

confidence: 99%

Nanoporous carbon for electrochemical capacitive energy storage

et al. 2020

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“…[12,[32][33][34][35] Carbonbased materials can also be operated over a wide temperature range of −100 to 60 °C, with extremely low failure rates. [36] Since energy storage and release occur by nanoscale charge separation or EDL formation across the electrode-electrolyte interface, carbon-based supercapacitors offer very fast chargedischarge cycles suitable for prolonged operation.…”

mentioning

confidence: 99%

Heteroatom‐Doped and Oxygen‐Functionalized Nanocarbons for High‐Performance Supercapacitors

Ghosh

Barg

Jeong

et al. 2020

Advanced Energy Materials

388

237

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Electrochemical capacitors (best known as supercapacitors) are high‐performance energy storage devices featuring higher capacity than conventional capacitors and higher power densities than batteries, and are among the key enabling technologies of the clean energy future. This review focuses on performance enhancement of carbon‐based supercapacitors by doping other elements (heteroatoms) into the nanostructured carbon electrodes. The nanocarbon materials currently exist in all dimensionalities (from 0D quantum dots to 3D bulk materials) and show good stability and other properties in diverse electrode architectures. However, relatively low energy density and high manufacturing cost impede widespread commercial applications of nanocarbon‐based supercapacitors. Heteroatom doping into the carbon matrix is one of the most promising and versatile ways to enhance the device performance, yet the mechanisms of the doping effects still remain poorly understood. Here the effects of heteroatom doping by boron, nitrogen, sulfur, phosphorus, fluorine, chlorine, silicon, and functionalizing with oxygen on the elemental composition, structure, property, and performance relationships of nanocarbon electrodes are critically examined. The limitations of doping approaches are further discussed and guidelines for reporting the performance of heteroatom doped nanocarbon electrode‐based electrochemical capacitors are proposed. The current challenges and promising future directions for clean energy applications are discussed as well.

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Temperature-independent capacitance of carbon-based supercapacitor from −100 to 60 °C

Cited by 111 publications

References 32 publications

Superior Multifunctional Activity of Nanoporous Carbons with Widely Tunable Porosity: Enhanced Storage Capacities for Carbon‐Dioxide, Hydrogen, Water, and Electric Charge

Superior Multifunctional Activity of Nanoporous Carbons with Widely Tunable Porosity: Enhanced Storage Capacities for Carbon‐Dioxide, Hydrogen, Water, and Electric Charge

Nanoporous carbon for electrochemical capacitive energy storage

Heteroatom‐Doped and Oxygen‐Functionalized Nanocarbons for High‐Performance Supercapacitors

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Temperature-independent capacitance of carbon-based supercapacitor from −100 to 60 °C

Cited by 111 publications

References 32 publications

Superior Multifunctional Activity of Nanoporous Carbons with Widely Tunable Porosity: Enhanced Storage Capacities for Carbon‐Dioxide, Hydrogen, Water, and Electric Charge

Superior Multifunctional Activity of Nanoporous Carbons with Widely Tunable Porosity: Enhanced Storage Capacities for Carbon‐Dioxide, Hydrogen, Water, and Electric Charge

Nanoporous carbon for electrochemical capacitive energy storage

Heteroatom‐Doped and Oxygen‐Functionalized Nanocarbons for High‐Performance Supercapacitors

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Product

Resources

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Temperature-independent capacitance of carbon-based supercapacitor from −100 to 60 °C