Highly redox-active oligomers between graphene sheets as ultrahigh capacitance/rate and stable electrodes for supercapacitors

Qiu, Zhipeng; Liu, Zheng; Wang, Guanwen; Huangfu, Chao; Li, Zhiyuan; Yan, Yingchun; Chi, Chunlei; Gao, Pengfei; Lü, Xiaolong; Zhang, Su; Wei, Tong; Fan, Zhuangjun

doi:10.1016/j.ensm.2023.102824

Cited by 8 publications

(2 citation statements)

References 47 publications

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“…Meanwhile, a small diffraction peak appeared at 26.6°, which could be attributed to the p-p stacking between neighboring rGO layers. 40,41 Aer combing the COF or Au-COF with rGO nanosheets, the small peak at 26.6°disappeared, which was probably induced by the strong p-p interactions between COF and rGO sheets. [41][42][43] In addition, comparing the characteristic diffraction peaks with the original COF, the excess four peaks of the Au-COF/rGO at 2q = 38.2°, 44.4°, 64.6°, and 77.6°were assigned to the (111), ( 200), (220), and (311) planes of Au NPs.…”

Section: Design Principle and Materials Characterizationmentioning

confidence: 99%

Regulating the kinetic behaviours of polysulfides by designing an Au–COF interface in lithium–sulfur batteries

Li,

Yang,

et al. 2024

J. Mater. Chem. A

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Section: Design Principle and Materials Characterizationmentioning

confidence: 99%

Regulating the kinetic behaviours of polysulfides by designing an Au–COF interface in lithium–sulfur batteries

Li,

Yang,

et al. 2024

J. Mater. Chem. A

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“…Until now, we have prepared a series of graphene laminar structures using metal oxide, metal sulfide, carbon quantum dots, organic molecules or polymer as pillars which are confined into the graphene interlayers. [19][20][21][22][23][24][25][26][27][28] Due to the rational control of macro-ordered multilayered structure, the graphene blocks exhibit promising electrochemical performance in energy storage devices. Nevertheless, the bottom-up synthesis often leads to uncontrollability and inferior integrity of microcosmic graphite nanodomains due to the absent understanding of evolutionary mechanism and inevitable release of oxygen groups during carbonization.…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide Block Derived Edge‐Nitrogen Doped Quasi‐Graphite for High K⁺ Intercalation Capacity and Excellent Rate Performance

Chi,

Liu,

Wang

et al. 2023

Advanced Energy Materials

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The intercalation capacity at low potential of carbon‐based anode plays a significant role for developing potassium ion batteries (PIBs) with high energy density. However, the inferior rate and cyclic performance caused by repeated insertion/extraction of large K+ tremendously restricts the practical application of PIBs. Herein, a quasi‐graphite structure with abundant edge‐nitrogen doping, micropores structure, and enhanced graphite nanodomains via in situ polymerization of oligoaniline in‐between graphene oxide blocks and subsequent carbonization is proposed. The macro‐ordered multilayered structure with micro‐ordered graphite nanodomains can provide efficient K+ insertion/extraction channels, thus greatly increasing the intercalation capacity at low potentials. Moreover, the high edge‐nitrogen doping (97%) is of great importance for improving K+ transfer kinetics, particularly at high current densities. As a result, the anode exhibits a high discharge capacity below 0.5 V (303 mAh g−1 at 0.05 A g−1), outstanding rate performance (113 mAh g−1 at 5 A g−1), and long‐term cycle stability (176 mAh g−1 at 1 A g−1 after 2000 cycles). The K+ intercalation mechanism and enhanced kinetics are systematically probed by in situ Raman spectroscopy, ex situ X‐ray diffraction (XRD) spectra, and theoretical calculations. This results demonstrate that the construction of quasi‐graphite with heteroatom doping is feasible for large ion storage.

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A Small‐Molecule Organic Cathode with Extended Conjugation toward Enhancing Na⁺ Migration Kinetics for Advanced Sodium‐Ion Batteries

Yao,

Pei,

et al. 2024

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Organic cathode materials show excellent prospects for sodium‐ion batteries (SIBs) owing to their high theoretical capacity. However, the high solubility and low electrical conductivity of organic compounds result in inferior cycle stability and rate performance. Herein, an extended conjugated organic small molecule is reported that combines electroactive quinone with piperazine by the structural designability of organic materials, 2,3,7,8‐tetraamino‐5,10‐dihydrophenazine‐1,4,6,9‐tetraone (TDT). Through intermolecular condensation reaction, many redox‐active groups C═O and extended conjugated structures are introduced without sacrificing the specific capacity, which ensures the high capacity of the electrode and enhances rate performance. The abundant NH2 groups can form intermolecular hydrogen bonds with the C═O groups to enhance the intermolecular interactions, resulting in lower solubility and higher stability. The TDT cathode delivers a high initial capacity of 293 mAh g−1 at 500 mA g−1 and maintains 90 mAh g−1 at an extremely high current density of 70 A g−1. The TDT || Na‐intercalated hard carbon (Na‐HC) full cells provide an average capacity of 210 mAh g−1 during 100 cycles at 500 mA g−1 and deliver a capacity of 120 mAh g−1 at 8 A g−1.

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Highly redox-active oligomers between graphene sheets as ultrahigh capacitance/rate and stable electrodes for supercapacitors

Cited by 8 publications

References 47 publications

Regulating the kinetic behaviours of polysulfides by designing an Au–COF interface in lithium–sulfur batteries

Regulating the kinetic behaviours of polysulfides by designing an Au–COF interface in lithium–sulfur batteries

Graphene Oxide Block Derived Edge‐Nitrogen Doped Quasi‐Graphite for High K⁺ Intercalation Capacity and Excellent Rate Performance

A Small‐Molecule Organic Cathode with Extended Conjugation toward Enhancing Na⁺ Migration Kinetics for Advanced Sodium‐Ion Batteries

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Highly redox-active oligomers between graphene sheets as ultrahigh capacitance/rate and stable electrodes for supercapacitors

Cited by 8 publications

References 47 publications

Regulating the kinetic behaviours of polysulfides by designing an Au–COF interface in lithium–sulfur batteries

Regulating the kinetic behaviours of polysulfides by designing an Au–COF interface in lithium–sulfur batteries

Graphene Oxide Block Derived Edge‐Nitrogen Doped Quasi‐Graphite for High K+ Intercalation Capacity and Excellent Rate Performance

A Small‐Molecule Organic Cathode with Extended Conjugation toward Enhancing Na+ Migration Kinetics for Advanced Sodium‐Ion Batteries

Contact Info

Product

Resources

About

Graphene Oxide Block Derived Edge‐Nitrogen Doped Quasi‐Graphite for High K⁺ Intercalation Capacity and Excellent Rate Performance

A Small‐Molecule Organic Cathode with Extended Conjugation toward Enhancing Na⁺ Migration Kinetics for Advanced Sodium‐Ion Batteries