Nitrogen-doped porous carbon composite with three-dimensional conducting network for high rate supercapacitors

Wu, Mengmeng; Tong, Shixuan; Jiang, Lili; Hou, Baoquan; Li, Xinyue; Zhang, Yacong; Yue, Jinhui; Jiang, Meihui; Sheng, Lizhi

doi:10.1016/j.jallcom.2020.156217

Cited by 39 publications

(7 citation statements)

References 50 publications

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“…In addition, most of the doped N element in this electrode material may be an active site for the redox reaction, but the number of N–Q structures for enhancing electric conduction is lacking. Wu et al obtained a N-doped PC composite from ZIF-8 and carbon nanotubes with a 3D network structure . The ZIF-8-derived PC provides a pore structure as a storage place for electrolyte ions, while carbon nanotubes are conductive to the transmission of electrons and improve overall conductivity.…”

Section: Introductionmentioning

confidence: 99%

“…Wu et al obtained a N-doped PC composite from ZIF-8 and carbon nanotubes with a 3D network structure. 13 The ZIF-8-derived PC provides a pore structure as a storage place for electrolyte ions, while carbon nanotubes are conductive to the transmission of electrons and improve overall conductivity. This carbon composite delivers a 334.5 F g −1 high specific capacitance at 1 A g −1 with, nonetheless, only a 58% capacitance retention (1−100 A g −1 ).…”

Section: Introductionmentioning

confidence: 99%

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Controlling Morphologies and Structures of PANI@Carbon with Superior Rate Performance for Supercapacitors

Jiang

Cai

Krishnamoorthy

et al. 2022

ACS Appl. Energy Mater.

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The preparation of porous carbon (PC) with a unique morphology, appropriate pore size distribution, and heteroatom doping has been a major challenge for high-performance supercapacitors. Herein, we developed nematosphere-like N-doped porous carbon (NNPC) via the activation of a polyaniline@PC (PANI@PC) composite that was acquired through PANI in situ growth on the surface of PC derived from Al-MOF (MOF, metal–organic framework). The as-prepared NNPC material possesses a huge specific surface area of up to 2360 m2 g–1 as well as a pore volume of 1.15 cm3 g–1, exhibiting an excellent specific capacitance (346 F g–1 at 1 A g–1) and amazing rate performance with 78.3% capacitance retention when the working current density swells from 1 to 100 A g–1. In addition, the electrode material also displays an extraordinary cyclic stability with an extremely low capacitance loss of 5.9% over 100 000 cycles at 50 A g–1. Furthermore, this NNPC-based symmetric supercapacitor delivers a superior energy density of 23.7 W h kg–1 in 6 M KOH with a 0–1.4 V operating voltage. These outstanding electrochemical performances are attributed to the nematosphere-like morphology, hierarchical pore structure, and enhanced electrical conductivity of NNPC for fast ion/charge migration and exchange. This work proposes a strategy to develop innovative electrode materials by combining MOF-derived PC and N-rich polymer for supercapacitor applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Controlling Morphologies and Structures of PANI@Carbon with Superior Rate Performance for Supercapacitors

Jiang

Cai

Krishnamoorthy

et al. 2022

ACS Appl. Energy Mater.

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“…According to the Bragg equation, the corresponding interlayer spacing of GO was 0.88 nm. 21 The diffraction peak of GO at 10.2°d isappeared upon the hydrothermal reaction, and the RGH and HGH reveal a broad diffraction peak located at ∼24°. With the increase in the amount of (NH 4 ) 2 S 2 O 8 , the peak of the HGH was broadened and moved to the lower peak, and the interlayer spacing of the RGH, HGH-0.5, HGH-1, HGH-1.5, and HGH-2 was calculated to be 0.361, 0.367, 0.371, 0.374, and 0.379, respectively.…”

Section: Resultsmentioning

confidence: 98%

“…Figure b displays the XRD patterns of the GO, RGH, and HGH; the patterns of GO exhibit a sharp peak at 2θ = 10.2°. According to the Bragg equation, the corresponding interlayer spacing of GO was 0.88 nm . The diffraction peak of GO at 10.2° disappeared upon the hydrothermal reaction, and the RGH and HGH reveal a broad diffraction peak located at ∼24°.…”

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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“…However, pure carbon nanoparticles still exhibited a low theoretical capacity. Similar to the secondary batteries, it was also one of the most effective ways to improve the energy storage capacity of supercapacitors by coupling with other high-capacity materials [180][181][182][183]. Recently, Ma's group got a hemispherical N-doped porous carbon/NiCo 2 O 4 (NPC/ NiCo 2 O 4 ) composite (Fig.…”

Section: Electrochemical Energy Storage Applicationsmentioning

confidence: 99%

Recent Progress on Asymmetric Carbon- and Silica-Based Nanomaterials: From Synthetic Strategies to Their Applications

Liang

et al. 2022

Nano-Micro Lett.

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Highlights The synthetic strategies and fundamental mechanisms of various asymmetric carbon- and silica-based nanomaterials were systematically summarized. The advantages of asymmetric structure on their related applications were clarified by some representative applications of asymmetric carbon- and silica-based nanomaterials. The future development prospects and challenges of asymmetric carbon- and silica-based nanomaterials were proposed. Abstract Carbon- and silica-based nanomaterials possess a set of merits including large surface area, good structural stability, diversified morphology, adjustable structure, and biocompatibility. These outstanding features make them widely applied in different fields. However, limited by the surface free energy effect, the current studies mainly focus on the symmetric structures, such as nanospheres, nanoflowers, nanowires, nanosheets, and core–shell structured composites. By comparison, the asymmetric structure with ingenious adjustability not only exhibits a larger effective surface area accompanied with more active sites, but also enables each component to work independently or corporately to harness their own merits, thus showing the unusual performances in some specific applications. The current review mainly focuses on the recent progress of design principles and synthesis methods of asymmetric carbon- and silica-based nanomaterials, and their applications in energy storage, catalysis, and biomedicine. Particularly, we provide some deep insights into their unique advantages in related fields from the perspective of materials’ structure–performance relationship. Furthermore, the challenges and development prospects on the synthesis and applications of asymmetric carbon- and silica-based nanomaterials are also presented and highlighted.

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Nitrogen-doped porous carbon composite with three-dimensional conducting network for high rate supercapacitors

Cited by 39 publications

References 50 publications

Controlling Morphologies and Structures of PANI@Carbon with Superior Rate Performance for Supercapacitors

Controlling Morphologies and Structures of PANI@Carbon with Superior Rate Performance for Supercapacitors

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

Recent Progress on Asymmetric Carbon- and Silica-Based Nanomaterials: From Synthetic Strategies to Their Applications

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