Nitrogen/oxygen co-doped monolithic carbon electrodes derived from melamine foam for high-performance supercapacitors

Zhang, Rui; Jing, Xiangxia; Chu, Yanting; Wang, Lei; Kang, Wenjun; Wei, Denghu; Li, Haibo; Xiong, Shenglin

doi:10.1039/c8ta06471g

Cited by 211 publications

(104 citation statements)

References 49 publications

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“…In the XPS survey scan of MnO 2 @N–AC (Figure a), four peaks were revealed corresponding to carbon (C1s), oxygen (O1s), nitrogen (N1s), and manganese (Mn2p 1/2 and Mn2p 3/2 ). The high‐resolution C1s XPS spectrum of MnO 2 @N–AC (Figure b) showed the peaks at 288.1 eV (OCO, CO), 286.2 eV (CN, CO), and 284.5 eV (CC, CC) . Further, the N1s spectrum was analyzed to confirm the binding of nitrogen in MnO 2 @N–AC (Figure c).…”

Section: Resultsmentioning

confidence: 99%

“…Feng et al reported bilayer N‐doped carbon prepared by furfuryl alcohol‐draped MS for supercapacitors, which showed the capacitance of 184 F g −1 at 5 mV s −1 scanning rate . Zhang et al N/O codoped the carbon monolithic electrode prepared from MS that exhibited a high capacitance 325 F g −1 at 10 mV s −1 scan rate and 242 F g −1 at 0.5 A g −1 current density . Wang et al developed, N‐doped AC sheets using melamine for supercapacitor applications.…”

Section: Introductionmentioning

confidence: 99%

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Waste‐Derived Heteroatom‐Doped Activated Carbon/Manganese Dioxide Trio‐Composite for Supercapacitor Applications

2020

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The utilization of biological‐waste materials to synthesize heteroatom‐doped activated carbon (AC), followed by metal oxide functionalization for high‐performance supercapacitors is described. Herein, easily available and cheap biowaste, i.e., cow dung (CD), and low priced‐nontoxic waste melamine sponge (MS) are consumed to produce nitrogen‐doped AC followed by functionalization with economically inexpensive manganese dioxide (MnO2), that is utilized to provide an efficient energy‐storage material. The use of CD, MS, and MnO2 materials furnishes the process with sustainability, cost‐effectiveness, and safe components for the doping of heteroatoms and metal oxide on the carbon framework for energy‐storage applications. The subsequent material exhibits maximum specific capacitance, i.e., 424 F g−1, at a current density of 1 A g−1, which relates to maximum power as well as the energy density of 1817 W kg−1 and 47.7 Wh kg−1, respectively. The resultant material shows high‐performance specific capacitance and excellent cyclic stability for supercapacitor applications. This modest process of the direct production of N‐doped AC followed by MnO2 functionalization is a simple, economical, large production of a nanomaterial prototype for different applications including supercapacitor applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Waste‐Derived Heteroatom‐Doped Activated Carbon/Manganese Dioxide Trio‐Composite for Supercapacitor Applications

2020

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“…The CNF capacitors all showed an ultralong cycling lifespan, and CNF-5 still had a capacitance retention of 93.6 % after 10,000 cycles. [42] In order to further understand the effect of reactive nitrogen and pore engineering on the pseudo-capacitance of EDLC and total capacitance, the Trasatti method is used to analyze and calculate the contributions of EDLC and pseudo-capacitance to the total specific capacitance of CNF-1/3/5 (10-200 mV s À 1 ). As shown in the inset, the solution resistance (R s ) is obtained from the left intercept of the real axis (Z'), and the charge transfer resistance (R ct ) is determined by the semicircle diameter.…”

Section: Two-electrode Configurationmentioning

confidence: 99%

“…More importantly, CNF-5 with 4.26 Wh kg À 1 (3.0 kW kg À 1 ) is better than some previously reported samples such as NOCS-1/10 (having 3.14 Wh kg À 1 at 3.0 kW kg À 1 ). [42] In order to further understand the effect of reactive nitrogen and pore engineering on the pseudo-capacitance of EDLC and total capacitance, the Trasatti method is used to analyze and calculate the contributions of EDLC and pseudo-capacitance to the total specific capacitance of CNF-1/3/5 (10-200 mV s À 1 ). [43] In Figure 5g-i, the EDLC of the three samples dominates their respective specific capacitances, well in line with the fact that the porous structure can increase EDLC, and is consistent with the structure in the previously analyzed PSD curve.…”

Section: Two-electrode Configurationmentioning

confidence: 99%

Tuning Nitrogen Species in Two‐Dimensional Carbon through Pore Structure Change for High Supercapacitor Performance

et al. 2019

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Carbonaceous materials have long been a key component of supercapacitor energy storage systems, and exploring nitrogen atom doping and its role is currently the focus of carbon-based electrode development. However, achieving a high proportion of pyridinic N (active N) in N-doped carbon is still a big challenge. Here, by introducing a triblock copolymer F127 into the phenolic resin, the pore structure of the two-dimensional carbon material is successfully adjusted, thereby increasing the probability of generation of active nitrogen. We found that this two-dimensional porous structure is beneficial to the formation of pyridinic N. Through the change of pore structure, the ratio of pyridinic N to the total N was further increased by 13.9 %.Therefore, it provides a large specific capacitance (220 F g À 1 ), excellent cycle stability (93.6 %) and high rate performance (71.2 %) in the alkaline KOH electrolyte. To further increase the energy density, we constructed an symmetrical supercapacitor device using an ionic liquid electrolyte (equal amount of 1ethyl-3-methylimidazolium tetrafluoroborate and acetonitrile). As a result, since the electrolyte has a voltage window of up to 3 V, the energy density is as high as 37.5 Wh kg À 1 . This superior performance indicates that adjusting the ratio of pyridinic N provides a promising method for preparing excellent N-doped carbon materials for energy storage systems.

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“…Nowadays, there are numerous nitrogen-containing 3D organic polymer such as polyurethane sponge, melamine sponge etc., [8,22,23] which can be selected as precursors for the synthesis of interconnected 3D carbon materials employing a facile pyrolysis method with nitrogen-doped simultaneously. [24,25] These polymeric sponges show great superiority for their commercially available, robust and inexpensive character. [26,27] A thermal annealing treatment in nitrogen atmosphere, one can obtain free-standing and in situ nitrogen-doped carbon monolith with large internal void space which can accommodate certain fine substances to introduce functional spices.…”

Section: Introductionmentioning

confidence: 99%

Three‐Dimensional Interconnected Porous Nitrogen‐Doped Carbon Hybrid Foam for Notably Promoted Direct Dehydrogenation of Ethylbenzene to Styrene

Zhao

2019

ChemCatChem

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Owning to the high corrosion-resistance, stable structure, unique surface properties and sustainability, the carbon-base catalysts have attracted increasing interest in heterogeneous catalysis. Herein, we report a facile combining strategy to fabricate a novel three-dimensional (3D) interconnected porous nitrogen-doped carbon hybrid foam featuring with the interconnected nitrogen-doped carbon foam coated by porous nitrogen-doped carbon (NC MS @NC Glu-NH4Cl ) by annealing the freeze-dried NH 4 Cl-glucose containing aqueous solution soaked melamine sponge (MS@Glu/NH 4 Cl). The as-prepared NC MS @NC Glu-NH4Cl hybrid foam shows 1.6 times high steady-state styrene rate (4.77 mmol g À 1 h À 1 ) with 96.4 % of selectivity for direct dehydrogenation of ethylbenzene to styrene as compared to the well-established nanodiamond. This work not only generates an excellent carbon catalyst to replace the established nanodiamond for direct dehydrogenation of ethylbenzene, but also opens up a potential avenue for designing novel carbon materials towards the adsorption and supercapacitor besides acting as a promising catalyst for diverse transformations.[a] Dr.

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Nitrogen/oxygen co-doped monolithic carbon electrodes derived from melamine foam for high-performance supercapacitors

Abstract: A novel nitrogen/oxygen co-doped carbon sponge (NOCS) is directly applied as a monolithic binder-free electrode for supercapacitors. It exhibits a high specific capacitance and excellent electrochemical cyclability.

Cited by 211 publications

References 49 publications

Waste‐Derived Heteroatom‐Doped Activated Carbon/Manganese Dioxide Trio‐Composite for Supercapacitor Applications

Waste‐Derived Heteroatom‐Doped Activated Carbon/Manganese Dioxide Trio‐Composite for Supercapacitor Applications

Tuning Nitrogen Species in Two‐Dimensional Carbon through Pore Structure Change for High Supercapacitor Performance

Three‐Dimensional Interconnected Porous Nitrogen‐Doped Carbon Hybrid Foam for Notably Promoted Direct Dehydrogenation of Ethylbenzene to Styrene

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