Broccoli-like porous carbon nitride from ZIF-8 and melamine for high performance supercapacitors

Cai, Chenglong; Zou, Yongjin; Xiang, Cuili; Chu, Hailiang; Qiu, Shujun; Sui, Qingli; Xu, Fen; Sun, Lin; Shah, Afzal

doi:10.1016/j.apsusc.2017.12.242

Cited by 109 publications

(24 citation statements)

References 46 publications

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“…The XPS high‐resolution spectrum of C 1s, as shown in Figure d, was further used to investigate the chemical states of the carbon layer. The C 1s peaks have been fitted into three peaks, which correspond to sp2‐hybridized carbon (named C‐1), the hydroxyl carbon (named C‐2), and carboxyl carbon (named C‐3), respectively . No peak assigned to the Zn‐C band is detected, indicating the carbon mainly modified on the surface of ZnO.…”

Section: Resultsmentioning

confidence: 99%

Carbon‐Modified CuO/ZnO Catalyst with High Oxygen Vacancy for CO₂ Hydrogenation to Methanol

Wei

Gao

et al. 2020

Energy Tech

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CO2 hydrogenation to methanol is a prospective approach to alleviate both global warming and energy problems. CuO/ZnO is proven to be an efficient catalyst, in which ZnO carriers prepared by different methods directly affect the catalytic activity. Herein, a novel method is used to apply a zeolite imidazolate framework‐8 (ZIF‐8)‐derived ZnO to the carrier of copper‐based catalyst. In the process of thermal transformation from ZIF‐8 to ZnO, the carrier ZnO‐400 is specially modified by carbon inherited from ZIF‐8, and the corresponding CuO/ZnO‐400 catalyst still has special carbon modification, which is confirmed by transmission electron microscopy (TEM), X‐ray photoelectron spectroscopy (XPS), and Raman spectroscopy. Meanwhile, the pyrolysis temperature of ZIF‐8 affects the surface oxygen defects of ZnO and the CuO/ZnO‐400 catalyst has a large oxygen vacancy concentration, which is proven by X‐ray diffraction (XRD) and XPS. Consequently, the CuO/ZnO‐400 catalyst achieves the best CO2 conversion and methanol selectivity due to more oxygen vacancies and carbon modification.

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Section: Resultsmentioning

confidence: 99%

Carbon‐Modified CuO/ZnO Catalyst with High Oxygen Vacancy for CO₂ Hydrogenation to Methanol

Wei

Gao

et al. 2020

Energy Tech

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“…Recently, zeolitic imidazolate frameworks (ZIF) with high nitrogen content and ultrafine particle size have been utilized to be ideal templates or precursors for fabricating nitrogen‐doped porous carbon materials . For example, Yamauchi et al.…”

Section: Introductionmentioning

confidence: 99%

Boosting Supercapacitor Performance of Graphene by Coupling with Nitrogen‐Doped Hollow Carbon Frameworks

Wang

Jia

Liu

et al. 2020

Chemistry A European J

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Graphene as a suitable electrode has been extensively used for electrochemical double‐layer capacitors based on its excellent properties, including high electrical conductivity and large specific surface area. However, one of the drawbacks is the unavoidable stacking tendency between the graphene nanosheets, resulting in limited electrochemically specific surface area. Herein, novel graphene nanosheets supported by hollow nitrogen‐doped carbon frameworks derived from ZIF‐8 (GPNC) were fabricated through a simple polyethyleneimine (PEI)‐assisted pyrolysis strategy, to boost capacitance performance. Benefiting from the unique scaffold/support role of hollow nitrogen‐doped carbon frameworks within the graphene interlayer, the GPNC with a large specific surface area, along with ample micropore/mesopore channels and high nitrogen content, is capable of facilitating electron and electrolyte ion migration kinetics and enhancing intrinsic electrochemical activity. Thus, the GPNC exhibits the highest charge storage of 218 F g−1 and superior rate capability of 74 % when the current density increased from 0.5 to 20 Ag−1 in comparison to pristine graphene and common ZIF‐derived carbon/graphene electrodes. The assembled GPNC//GPNC two‐electrode system further delivers a maximum power of 9080 Wkg−1 with outstanding electrochemical retention of 84 % over 10 000 cycles.

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“…Supercapacitors and secondary cells are regarded as promising candidates for energy storage and conversion devices. Interesting results have already been published for supercapacitors, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] lithiumion secondary batteries, [16][17][18][19][20][21] and sodium-ion secondary batteries. 22 Hybrid supercapacitors, however, merge the boundary between the supercapacitors and secondary batteries and possess several advantages over them, including high energy density, high power density, fast charge and discharge speed, and long cycle life.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen ion supercapacitor cell construction and rational design of cell structure

Xie

Zhou

et al. 2019

Int J Energy Res

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Summary A hydrogen ion supercapacitor cell was constructed with an electrochemical double‐layer carbon material as positive electrode and an electrochemical hydrogen storage composite material as negative electrode. The electrochemical performances of both electrodes and hybrid device were investigated by varying of the mass ratio of positive and negative electrode. It was found to be that both electrodes went through the different hydrogen ion storage processes and the capacity of this hybrid supercapacitor was highly correlated with the negative to the positive electrode ratio. The highest capacity was achieved at ratio of 1:7; further increasing of this ratio may downgrade the performance of the hybrid system. With this optimized ratio, the hybrid device demonstrated good electrochemical performance.

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Broccoli-like porous carbon nitride from ZIF-8 and melamine for high performance supercapacitors

Cited by 109 publications

References 46 publications

Carbon‐Modified CuO/ZnO Catalyst with High Oxygen Vacancy for CO₂ Hydrogenation to Methanol

Carbon‐Modified CuO/ZnO Catalyst with High Oxygen Vacancy for CO₂ Hydrogenation to Methanol

Boosting Supercapacitor Performance of Graphene by Coupling with Nitrogen‐Doped Hollow Carbon Frameworks

Hydrogen ion supercapacitor cell construction and rational design of cell structure

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Broccoli-like porous carbon nitride from ZIF-8 and melamine for high performance supercapacitors

Cited by 109 publications

References 46 publications

Carbon‐Modified CuO/ZnO Catalyst with High Oxygen Vacancy for CO2 Hydrogenation to Methanol

Carbon‐Modified CuO/ZnO Catalyst with High Oxygen Vacancy for CO2 Hydrogenation to Methanol

Boosting Supercapacitor Performance of Graphene by Coupling with Nitrogen‐Doped Hollow Carbon Frameworks

Hydrogen ion supercapacitor cell construction and rational design of cell structure

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Product

Resources

About

Carbon‐Modified CuO/ZnO Catalyst with High Oxygen Vacancy for CO₂ Hydrogenation to Methanol

Carbon‐Modified CuO/ZnO Catalyst with High Oxygen Vacancy for CO₂ Hydrogenation to Methanol