One-step production of O-N-S co-doped three-dimensional hierarchical porous carbons for high-performance supercapacitors

Zhao, Gongyuan; Chen, Chong; Yu, Dong; Sun, Lei; Yang, Chenhui; Zhang, Hong; Sun, Yuxiu; Besenbacher, Flemming

doi:10.1016/j.nanoen.2018.03.016

Cited by 584 publications

(260 citation statements)

References 54 publications

Supporting

Mentioning

251

Contrasting

Order By: Relevance

“…The derived equivalent series resistance ( R s ) and the charge transfer resistance ( R ct ) were 0.9 Ω and 1.3 Ω, respectively. The small R s was attributed to the inherent high conductivity and in situ growth of the NNs on the nickel foam substrate . The small R ct was owing to the extensively accessible porous structures of the nanosheet networks …”

Section: Resultsmentioning

confidence: 99%

Porous Ultrathin NiSe Nanosheet Networks on Nickel Foam for High‐Performance Hybrid Supercapacitors

Zhao

et al. 2019

ChemSusChem

Self Cite

View full text Add to dashboard Cite

Transition metal selenides (TMSs) with excellent electrochemical activity and high intrinsic electrical conductivity have attracted considerable attention owing to their potential use in energy storage devices. However, the low energy densities of the reported TMSs, which originate from the small active surface area and poor electrolyte ion mobility, substantially restrict their application potential. In this work, porous ultrathin nickel selenide nanosheet networks (NiSe NNs) on nickel foam are fabricated by using a novel, facile method, that is, selenylation/pickling of the pre‐formed manganese‐doped α‐Ni(OH)2. Removal of Mn resulted in NNs with a highly porous structure. The 3D framework of the NNs and the inherent nature of the NiSe affords high ion mobility, abundant accessible activated sites, vigorous electrochemical activity, and low resistance. One of the highest specific capacities of TMSs ever reported, that is, 443 mA h g−1 (807 μAh cm−2) at 3.0 A g−1, is achieved with the NNs as electrodes. The assembled NiSe NNs//porous carbon hybrid supercapacitor delivers a high energy density of 66.6 Wh kg−1 at a power density of 425 W kg−1, with excellent cycling stability. This work provides a new strategy for the production of novel electrode materials that can be applied in high‐performance hybrid supercapacitors, and a fresh pathway towards commercial applications of hybrid supercapacitors based on TMS electrodes.

show abstract

Section: Resultsmentioning

confidence: 99%

Porous Ultrathin NiSe Nanosheet Networks on Nickel Foam for High‐Performance Hybrid Supercapacitors

Zhao

et al. 2019

ChemSusChem

Self Cite

View full text Add to dashboard Cite

show abstract

“…The abundant regulated micropores with a large SSA could fully contribute to the charge storage. Despite that the micropores will be partially blocked at high current density, the improved wettability of ALC‐32000‐800 owing to the great number of heteroatoms alleviates the difficult ion diffusion and provide more accessible surface area for charge accumulation . The electrochemical activity enhanced by the polarized sites of hydroxyl, carboxylic, carbonyl and N5/N6 groups further facilitates the remarkable specific capacitance of ALC‐32000‐800 .…”

Section: Resultsmentioning

confidence: 99%

Structural Rigging of Lignin Precursors for Customized Porous and Graphene‐Like Carbons towards Enhanced Supercapacitive Performance in Aqueous and Non‐Aqueous Electrolytes

Liu

Zhang

et al. 2019

ChemElectroChem

View full text Add to dashboard Cite

Maximum supercapacitive performance in different electrolytes is desirable in the design of advanced carbon materials but still challenged by the conflicting properties of electrolytes. Herein, a practical and scalable strategy to customize carbon materials for aqueous and non‐aqueous electrolytes was proposed via structural rigging of lignin precursors. The resultant graphene‐like hierarchical porous carbon sheets from low‐molecular‐weight lignin exhibit a high electrical conductivity of 17.8 S cm−1, a prominent capacitance of 245 F g−1 at 1 A g−1 and impressive chemical stability in the symmetric supercapacitor of ionic liquid electrolyte. The top‐level energy density of 96.7 Wh kg−1 at a power density of 0.9 kW kg−1 and 48.5 Wh kg−1 at 20.5 kW kg−1 is also obtained. In contrast, the 3D oriented N/O co‐doped porous carbon composed of high‐molecular‐weight lignin possesses high specific surface area (>2400 m2 g−1), regulated micropores and rich heteroatoms for remarkable specific capacitances of 402 F g−1 and 306 F g−1 at 1.0 A g−1 in three‐ and two‐electrode configurations of aqueous electrolyte, respectively. The established formation mechanisms further extend the exploration of highly plastic lignin precursors for diverse energy storage systems.

show abstract

“…At the highfrequency region, the intercept at the real axis represents the solution resistance (Rs), which is derived from the intrinsic resistance of the MG-X electrodes, the resistance of the electrolyte, and the contact resistance in electrode/ current collector interface. The MG-1, MG-3, and MG-5 display the relatively low Rs value of~0.12 Ω, indicating good electrical conductivity [37,38], which is related to their low oxygen content and enhanced sp 2 carbon domain. There are semicircles in the high-frequency range in the EIS spectrogram of three electrodes, which are caused by the charge transfer resistance (R ct ).…”

Section: Journal Of Nanomaterialsmentioning

confidence: 99%

Facile Synthesis of Mesoporous Graphene Materials from Potassium Humate for Supercapacitor Electrodes

Huang

Geng

Kang

et al. 2018

Journal of Nanomaterials

View full text Add to dashboard Cite

Mesoporous graphene materials (MG-X) were prepared from potassium humate coupled with magnesium acetate. The freezedrying pretreatment and MgO particles not only prevent the agglomeration of graphene sheets and form mesopores but also help to reduce the oxygen content and enlarge the sp 2 carbon domain of MG-X. MG-X possess optimized characteristics including large specific surface area (>1100 m 2 ·g −1 ), high mesoporosity (~90%), and low oxygen content (~7%). When used as supercapacitor electrodes, MG-X demonstrate optimal electrochemical performances among all materials prepared here, such as high gravimetric capacitance (150 F·g −1 at high current density of 3.3 A·g −1) and enhanced rate capability with the capacitance retention of~80% from 0.041 to 3.3 A·g −1 . Moreover, MG-5 exhibits good cycling stability with a capacitance retention of 98.6% after 1000 cycles at 2.46 A·g −1 . This work provides a facile and efficient preparation method for mesoporous graphene materials used as supercapacitor electrodes.

show abstract

One-step production of O-N-S co-doped three-dimensional hierarchical porous carbons for high-performance supercapacitors

Cited by 584 publications

References 54 publications

Porous Ultrathin NiSe Nanosheet Networks on Nickel Foam for High‐Performance Hybrid Supercapacitors

Porous Ultrathin NiSe Nanosheet Networks on Nickel Foam for High‐Performance Hybrid Supercapacitors

Structural Rigging of Lignin Precursors for Customized Porous and Graphene‐Like Carbons towards Enhanced Supercapacitive Performance in Aqueous and Non‐Aqueous Electrolytes

Facile Synthesis of Mesoporous Graphene Materials from Potassium Humate for Supercapacitor Electrodes

Contact Info

Product

Resources

About