Synthesis and characterization of copper-infiltrated carbonized wood monoliths for supercapacitor electrodes

Teng, Shiang; Siegel, Gene; Prestgard, M. C.; Wang, Wei; Tiwari, Ashutosh

doi:10.1016/j.electacta.2015.02.117

Cited by 40 publications

(15 citation statements)

References 36 publications

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“…In addition, its rate capability is also superior to that of the previously reported copper-infiltrated carbonized wood monoliths in KOH aqueous electrolyte solution. 23 The main reason is an accelerating effect of carbonate ions on the metal electrode reaction rate in K 2 CO 3 solution. 49 The cycling behavior of the C/Cu/CNT composite at 700 mA g −1 (based on the weight of the active material in the electrode) is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…22 However, most of them -in particular copper -were not investigated in electrochemical capacitors except for a few reports on copperinfiltrated carbonized wood monoliths, 23 cuprous oxide microspherenanosheets, 24 copper-coating of activated carbon used as electrode material in a Li-ion capacitor, 25 copper-doped metal oxides 26 and copper as substrate 27 demonstrating electrochemical activity of copper in alkaline electrolyte solution. Furthermore, copper is a promising candidate electrode material for high power energy storage because of its high conductivity and environmental compatibility.…”

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confidence: 99%

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Improved Electrochemical Behavior of Amorphous Carbon-Coated Copper/CNT Composites as Negative Electrode Material and Their Energy Storage Mechanism

Liu

Wiek

Dzhagan

et al. 2016

J. Electrochem. Soc.

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A composite of copper grown on the surface of CNTs has been fabricated by a redox reaction between copper acetate and ethylene glycol for use as negative electrode at high currents in electrochemical energy storage. Subsequently, the as-prepared Cu/CNT composite was coated with carbon using glucose as carbon source. Structure, morphology and electrochemical performance of the composite were investigated by scanning electron microscopy, X-ray diffraction, XPS, and electrochemical measurements. The carbon coating effectively prevents the dissolution of copper carbonate complexes formed during the electrode reactions Cu 2 (OH) 2 CO 3 + 2e − → ← Cu 2 O + OH − + HCO − 3 and Cu 2 O + H 2 O + 2e − → ← 2Cu + 2OH − , increases the conductivity of the copper constituent in the negative electrode and protects this component against direct contact with the electrolyte solution during cycling. The C/Cu/CNTs composite exhibits higher capacity and better rate behavior as well as excellent cycling stability in 0. Electrochemical energy storage and conversion systems including batteries, fuel cells, and supercapacitors have attracted considerable attention in recent years since they can improve efficient use of electric energy, and thus reduce emission of greenhouse gases and promote the use of renewable energy.1 A main function of electrochemical capacitors (ECs, most popular called supercapacitors, regarding confusing terminology see Ref.2) is complementing batteries and fuel cells because of their high power capability, they also can provide necessary additional power for acceleration and can store energy during braking in hybrid electric vehicles.3 On a larger scale they can assist in maintaining power quality, 4-8 on a smaller scale they can provide additional power for short periods of time in mobile devices. Thus supercapacitor technology is regarded as a promising means for storing electricity.9 Because frequently materials are employed both in secondary batteries and supercapacitors (on the merger of these fields see Ref. 10,11) 21 All batteries based on pure metals as negative electrode have much higher theoretical capacities because of the smaller atomic weight of elements compared to their corresponding oxides which are frequently employed both in batteries and supercaps (for an overview see Ref.2), according to the equation C = (F · n)/(3.6 M) (C, F, n and M refer to capacity, Faraday constant, number of transferred electrons per unit and atomic/molecular mass, respectively). 22However, most of them -in particular copper -were not investigated in electrochemical capacitors except for a few reports on copperinfiltrated carbonized wood monoliths, 23 cuprous oxide microspherenanosheets, 24 copper-coating of activated carbon used as electrode material in a Li-ion capacitor, 25 copper-doped metal oxides 26 and copper as substrate 27 demonstrating electrochemical activity of copper in alkaline electrolyte solution. Furthermore, copper is a promising candidate electrode material for high power energy storage because of its...

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Improved Electrochemical Behavior of Amorphous Carbon-Coated Copper/CNT Composites as Negative Electrode Material and Their Energy Storage Mechanism

Liu

Wiek

Dzhagan

et al. 2016

J. Electrochem. Soc.

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“…Besides, the curve shape had similarities and discrepancies from the rectangular shape controlled by the electrical double layer capacitance. The clear current peaks at −0.39 V and −0.12 V were ascribed to the oxidation of Cu 0 to Cu 2+ in the electrode [32]. In addition, two peak currents were evident when scanning from 0 V to −1 V (at −0.38 V and −0.82 V), ascribed to the reduction of Cu 2+ to Cu 0 in the electrode [33].…”

Section: Resultsmentioning

confidence: 99%

Cu-Doped Porous Carbon Derived from Heavy Metal-Contaminated Sewage Sludge for High-Performance Supercapacitor Electrode Materials

Tan

Liu

et al. 2019

Nanomaterials

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In this paper, we report a complete solution for enhanced sludge treatment involving the removal of toxic metal (Cu(II)) from waste waters, subsequent pyrolytic conversion of these sludge to Cu-doped porous carbon, and their application in energy storage systems. The morphology, composition, and pore structure of the resultant Cu-doped porous carbon could be readily modulated by varying the flocculation capacity of Cu(II). The results demonstrated that it exhibited outstanding performance for supercapacitor electrode applications. The Cu(II) removal efficiency has been evaluated and compared to the possible energy benefits. The flocculant dosage up to 200 mg·L−1 was an equilibrium point existing between environmental impact and energy, at which more than 99% Cu(II) removal efficiency was achieved, while the resulting annealed product showed a high specific capacity (389.9·F·g−1 at 1·A·g−1) and good cycling stability (4% loss after 2500 cycles) as an electrode material for supercapacitors.

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“…[11][12][13] This strategy creates a hybrid supercapacitor with a large pseudocapacitance in addition to the capacitance provided by the electrical double-layer at the supporting electrode surface. 14 19,[21][22][23][24] to the best of our knowledge, there is still no report on the hybrid WDB/MnO 2 electrode. We now wish to report this electrode and its electrochemical properties.…”

Section: Introductionmentioning

confidence: 86%

Core–shell composite of wood-derived biochar supported MnO₂nanosheets for supercapacitor applications

Wan

Jiao

2016

RSC Adv.

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Eco-friendly wood-derived biochar (WDB) was used as a substrate material to support sheet-like nano-MnO2 via an easilyoperated in-situ redox reaction between the biochar and KMnO4. WDB was readily obtained by pyrolyzing wood waste of agriculture and industry. The MnO2/WDB composite displays a core-shell structure and can be utilized as a free-standing and binder-free supercapacitor electrode. The MnO2/WDB electrode has a moderate specific capacitance of 101 F·g -1 , an excellent coulombic efficiency of 98%-100%, and a good cyclic stability with a capacitance retention of 85.0% after 10000 cycles, making it useful for supercapacitor applications. Moreover, it is expected that such porous inexpensive WDB can serve as a novel harmless substrate material to combine with other electrochemical active substances for the development of high-performance energy storage devices.

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Synthesis and characterization of copper-infiltrated carbonized wood monoliths for supercapacitor electrodes

Cited by 40 publications

References 36 publications

Improved Electrochemical Behavior of Amorphous Carbon-Coated Copper/CNT Composites as Negative Electrode Material and Their Energy Storage Mechanism

Improved Electrochemical Behavior of Amorphous Carbon-Coated Copper/CNT Composites as Negative Electrode Material and Their Energy Storage Mechanism

Cu-Doped Porous Carbon Derived from Heavy Metal-Contaminated Sewage Sludge for High-Performance Supercapacitor Electrode Materials

Core–shell composite of wood-derived biochar supported MnO₂nanosheets for supercapacitor applications

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Synthesis and characterization of copper-infiltrated carbonized wood monoliths for supercapacitor electrodes

Cited by 40 publications

References 36 publications

Improved Electrochemical Behavior of Amorphous Carbon-Coated Copper/CNT Composites as Negative Electrode Material and Their Energy Storage Mechanism

Improved Electrochemical Behavior of Amorphous Carbon-Coated Copper/CNT Composites as Negative Electrode Material and Their Energy Storage Mechanism

Cu-Doped Porous Carbon Derived from Heavy Metal-Contaminated Sewage Sludge for High-Performance Supercapacitor Electrode Materials

Core–shell composite of wood-derived biochar supported MnO2nanosheets for supercapacitor applications

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Core–shell composite of wood-derived biochar supported MnO₂nanosheets for supercapacitor applications