Interconnected Hierarchical Porous Carbon from Lignin-Derived Byproducts of Bioethanol Production for Ultra-High Performance Supercapacitors

Zhang, Liming; You, Tingting; Zhou, Tianxing; Zhou, Xia; Xu, Feng

doi:10.1021/acsami.6b02774

Cited by 211 publications

(117 citation statements)

References 66 publications

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“…Hz is considerably comparable to or less than those of previously reported high-rate ionic liquid-based supercapacitors with biomass-based carbon electrodes, such as algae-derived porous carbons [42], lignin-derived porous carbon [43], shrimp shells-derived nitrogen-doped carbon nanosheets [11], hemp-derived carbon nanosheet [4] and reed-derived porous carbon nanosheets [44].…”

Section: A C C E P T E D Accepted Manuscriptsupporting

confidence: 60%

Unusual interconnected graphitized carbon nanosheets as the electrode of high-rate ionic liquid-based supercapacitor

Tian

Gao

Tan

et al. 2017

Carbon

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A type of unusual interconnected graphitized carbon nanosheets (GCNS) was fabricated from biomass waste, i.e., inner shaddock skins using a facile combined method of simultaneous carbonization-activation and post-vacuum-annealing processes. The obtained GCNS has an optimized integration of a cage-like high-aspect-ratio nanosheet structure (~8 nm thickness), a large surface area of 2327 m 2 g -1 and hierarchical meso/micropore systems (82.3% mesopore volume).Given the effect of post-vacuum-annealing process, enhanced graphitization degree and excellent electronic conductivity (7.9 S cm -1 ) were obtained for the GCNS. The enhanced graphitization degree not only effectively improves electronic/ionic-transport kinetics in favor of rate capability but also prevents electrolyte degradation thus benefitting cyclic life. The ionic liquid-based supercapacitors assembled with symmetric GCNS electrodes exhibited an ultrahigh rate capability of 87% at current density of 100 A g -1 (holding 132 F g −1 ) and a long cyclic life of 97.6% capacitance retention after 10,000 cycles. The excellent rate capability resulted in an integrated high energy-power property at an energy density of 56 Wh kg -1 (29.2 Wh L -1 ), corresponding to a power density of 93 kW kg -1 (48.4 kW L -1 ).

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Section: A C C E P T E D Accepted Manuscriptsupporting

confidence: 60%

Unusual interconnected graphitized carbon nanosheets as the electrode of high-rate ionic liquid-based supercapacitor

Tian

Gao

Tan

et al. 2017

Carbon

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“…The energy density of the AH‐Enz‐py SC was 14 Wh kg −1 and the maximum power density was 7000 W kg −1 . These values are very high as compared to other reported SCs based on lignin biomass,,,,, and reflect thus the high surface area and more graphitized structure of AH‐Enz‐py.…”

Section: Applications Of Biocharsmentioning

confidence: 61%

Biorefinery of Lignocellulosic Biomass from an Elm Clone: Production of Fermentable Sugars and Lignin‐Derived Biochar for Energy and Environmental Applications

et al. 2018

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Valorization of lignocellulosic feedstock from a Dutch elm disease tolerant Ulmus minor clone was studied as a new biomass resource. Herein, fermentable sugars and activated carbons from the side‐stream lignins were produced. For the sugar extraction organosolv and acid hydrolysis pretreatments prior to enzymatic hydrolysis were compared for the first time for this clone prior to enzymatic hydrolysis; organosolv was more efficient for delignification (49 %), while acid hydrolysis was more efficient at eliminating hemicelluloses (95 %). A high final glucose concentration of 22–23.5 g L−1 was obtained after enzymatic hydrolysis suggesting that this clone can be considered a potential source for glucose‐based biofuel production. The side‐stream lignins were converted to microporous biochars of high surface area (1220 m2 g−1) and micropore volume (0.42 cm3 g−1). These biochars exhibited excellent properties as electrodes in supercapacitors with a specific capacitance of 118 F g−1 and a high energy density of 14 Wh kg−1 at 7000 W kg−1, while they were also efficient adsorbents in water remediation of model contaminants.

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“…The operating frequency ( f 0 ) is defined as the value when the capacitance drops to 50 % of its maximum value and the time constant ( τ 0 ) is equal to f 0 −1 , which is the parameter used to measure the rate of the charge and discharge processes of the electrode. As shown in Figure S6, the f 0 of the SAC‐2//SAC‐2 symmetric EDLC was 0.46 Hz, corresponding to a time constant ( τ 0 = f 0 −1 ) of 2.17 s, which is superior to those of AC‐2//AC‐2 (5.56 s) and commercial devices (10–100 s) . The SAC‐2//SAC‐2 symmetric EDLC exhibited extraordinary durability with capacitance retentions of 97.4 % and 97.6 % after consecutive 5000 and 10 000 cycles at 2 and 6 A g −1 , respectively.…”

Section: Resultsmentioning

confidence: 96%

Excellent Compatibility of the Gravimetric and Areal Capacitances of an Electric‐Double‐Layer Capacitor Configured with S‐Doped Activated Carbon

Zhao

et al. 2018

ChemSusChem

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Coffee grounds were converted into S-doped activated carbon (SAC) in the presence of an active agent and S dopant through a one-step synthesis approach. Carbonization, activation, and S doping was achieved through this one-step methodology. The SAC was used as an electrode material for the preparation of a symmetric electrical-double-layer capacitor (EDLC), and the influence of the loading mass of the active materials on the capacitive behaviors was investigated. The assembled SAC-based symmetric EDLC not only yielded a high capacitance but it also afforded a satisfactory capacitance retention. The symmetric EDLC constructed with loading mass SAC of 7.5 mg cm was capable of delivering a maximum gravimetric and areal capacitance of 200 F g and 1.5 F cm , respectively. The compatibility of the gravimetric and areal capacitances of SAC was mainly attributed to the high abundance of interconnected pore channels, which were beneficial for the increased contact area between electrode and electrolyte ions, fast charge transfer, and fast diffusion of the electrolyte ions. In addition to the well-developed porous networks, the introduction of S into the carbon frameworks significantly enhanced the electrical conductivity, storage capacity, and rate capability. The developed one-step synthesis provides a facile and effective route for obtaining high-performance capacitive electrode materials and realizing high value-added utilization of biomass.

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Interconnected Hierarchical Porous Carbon from Lignin-Derived Byproducts of Bioethanol Production for Ultra-High Performance Supercapacitors

Cited by 211 publications

References 66 publications

Unusual interconnected graphitized carbon nanosheets as the electrode of high-rate ionic liquid-based supercapacitor

Unusual interconnected graphitized carbon nanosheets as the electrode of high-rate ionic liquid-based supercapacitor

Biorefinery of Lignocellulosic Biomass from an Elm Clone: Production of Fermentable Sugars and Lignin‐Derived Biochar for Energy and Environmental Applications

Excellent Compatibility of the Gravimetric and Areal Capacitances of an Electric‐Double‐Layer Capacitor Configured with S‐Doped Activated Carbon

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