Dual nitrogen sources co-doped mesoporous carbon with ultrahigh rate capability for high-performance supercapacitors

Xin, Xipeng; Wang, Zhihuan; Jia, Ruiming; Gao, Chang; Sui, Lina; Dong, Hua; Feng, Jianguang; Ma, Shuai; Pang, Beili; Chen, Yingjie; Dong, Lifeng; Yu, Liyan

doi:10.1016/j.jallcom.2019.153627

Cited by 21 publications

(10 citation statements)

References 74 publications

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“…20,36 N-5 and N-6 play important roles in contributing to the pseudocapacitance owing to the lone electron pair for conjugation with π-conjugated rings and electron-donor characteristics. 37,38 N, O co-doping can not only enhance the wettability of the carbon surface, but also provide more active sites for the Faraday reactions, thus contributing additional pseudocapacitance. 24,39 The possible reactions are summarized as follows: 40,41 …”

Section: Resultsmentioning

confidence: 99%

“…45,57 The porosities of NC-1 and NC-2 are predominated by micropores, which hinders the flow of electrolyte ions at higher current densities. 37 As for NC-3, on one hand, it has a relatively higher specific surface area, and on the other hand, it has a comparable proportion of mesopores and micropores, which not only provides a channel for electrolyte ion transport and diffusion but also improves the storage capacity of charge. Thereupon, the capacitance retention rate of NC-3 at 35 A g À1 reaches 47.10%, which is higher than that of NC-1 (30 A g À1 , 7.45%), NC-2 (35 A g À1 , 45.94%) and NC-4 (35 A g À1 , 39.21%).…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

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Soybean protein-derived N, O co-doped porous carbon sheets for supercapacitor applications

Yan

Zheng

et al. 2022

New J. Chem.

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Section: Resultsmentioning

confidence: 99%

Section: Electrochemical Propertiesmentioning

confidence: 99%

Soybean protein-derived N, O co-doped porous carbon sheets for supercapacitor applications

Yan

Zheng

et al. 2022

New J. Chem.

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“…Besides, HGH-1 has smaller charge transfer resistance than HGH-0.5, HGH-1.5, and HGH-2. Also, the slope of the low-frequency region is more inclined, which indicates that the HGH-1 electrode material has better conductivity and electron diffusion velocity and plays a better role in electrochemical performance . In addition, the resistance of materials can also be analyzed by means of the impedance spectra.…”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Nitrogen/Sulfur Co-doped Three-Dimensional Holey Graphene Hydrogels for High Supercapacitive Performance

Chen

et al. 2022

Energy Fuels

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Heteroatom-doped holey graphene hydrogels (HGHs) have attracted great interest owing to their remarkable porous structure, superior electrochemical performances, and prospective applications for supercapacitors. Herein, a simple and scalable approach to synthesize nitrogen, sulfur co-doped three-dimensional HGHs is developed using (NH 4 ) 2 S 2 O 8 as the pore-making agent and N, S sources by a one-step hydrothermal reaction. In a 6 M KOH electrolyte, the optimized HGH-based asymmetric supercapacitor exhibits an exceptionally high specific capacitance of 354 F g −1 at 1 A g −1 , an excellent rate capability of 299 F g −1 at 100 A g −1 , and outstanding cycle stability (104% of initial capacity retention at 5 A g −1 after 10,000 cycles). Additionally, the assembled HGH electrode supercapacitor possesses a high energy density of 21.14 Wh kg −1 (449.95 W kg −1 ) in a 1 M Na 2 SO 4 electrolyte. The N, S heteroatom doping and hierarchical pore structure are ascribed to the superior electrochemical performance of HGHs. Therefore, the convenient and efficient method in the present work provides new ways into the preparation of heteroatomdoped HGHs for high-performance supercapacitors.

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“…XPS characterization was performed to further investigate the elemental and chemical composition of the samples, especially for the present heteroatoms in carbon structure. [25,[53][54][55][56] The entire XPS spectra of samples are shown in Figure 4a, the detailed data of elemental component is summarized in Table 2. Four kinds of heteroatoms including N, P, O, and Si are doped into the as-prepared carbons.…”

Section: Resultsmentioning

confidence: 99%

Tetra‐Heteroatom‐Doped Ultra‐Mesoporous Carbon from Polyphosphazene for High‐Performance Supercapacitors

et al. 2021

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Applying multi-heteroatoms doping strategy to prepare porous carbon materials with high surface area has been demonstrated to be effective for enhancing electrochemical performance of supercapacitors. In this study, N, P, O, and Si tetra-atoms-doped hierarchically micro-/mesoporous carbon with ultrahigh surface area is fabricated from crosslinked-linear poly (diaryloxyphosphazene) precursor by using silica which serves as both template and dopant. The surface area and heteroatoms doping content of the synthesized carbons are tailored by tuning silica dosage and carbonization temperature. The tetra-atoms-doped mesoporous carbon exhibits an ultrahigh surface area of 3,132 m 2 /g with enriched heteroatoms content (22 at%), which contribute to the capacitive performance. The as-fabricated tetra-atoms-doped carbon symmetric cell displays outstanding specific capacitance of 288.8 F/g (0.5 A/g) (539.8 F/ g in three-electrode system) with high remaining capacitance of 226.1 F/g at 10 A/g and excellent cycling stability (97.7 % capacity retention after 5,000 cycles at 10 A/g). This study suggests an effective multi-heteroatoms-doping approach to synthesize mesoporous carbon materials for high performance electrochemical conversion and storage devices.

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Dual nitrogen sources co-doped mesoporous carbon with ultrahigh rate capability for high-performance supercapacitors

Cited by 21 publications

References 74 publications

Soybean protein-derived N, O co-doped porous carbon sheets for supercapacitor applications

Soybean protein-derived N, O co-doped porous carbon sheets for supercapacitor applications

Facile Synthesis of Nitrogen/Sulfur Co-doped Three-Dimensional Holey Graphene Hydrogels for High Supercapacitive Performance

Tetra‐Heteroatom‐Doped Ultra‐Mesoporous Carbon from Polyphosphazene for High‐Performance Supercapacitors

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