Biochar-derived material decorated by MXene/reduced graphene oxide using one-step hydrothermal treatment as high-performance supercapacitor electrodes

Sun, Yi; Yuan, Yudan; Geng, Xianwei; Han, Chi; Lu, Shenkai; Mitrović, Ivona Z.; Yang, Li; Song, Pengfei; Zhao, Cezhou

doi:10.1016/j.carbon.2022.07.058

Cited by 22 publications

(4 citation statements)

References 43 publications

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“…In Raman spectroscopy, the D-peak absorption band represents amorphous carbon structures or defective structures in graphite-like materials, while the G-peak absorption band represents regular or ordered structures of sp 2 -hybridized carbon atoms in graphite-like structures. 40 The Raman spectra of the three kinds of CDs are shown in Figure 2g−i, and all three kinds of CDs have obvious G-peaks (near 1570 cm −1 ) and D-peaks (near 1380 cm −1 ), 41 indicating that the three CDs have graphitized structural features. In Raman spectroscopy, the ratio of the area of the G-and D-peaks (I G /I D ) represents the magnitude of graphitization.…”

Section: Resultsmentioning

confidence: 99%

Full-Color Fluorescence of Carbonization-Triggered Carbon Dots for Multifunctional Light Module: Implications for Plant Lighting

Zhao,

Wang,

Mao

et al. 2024

ACS Appl. Nano Mater.

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Carbon dots (CDs) are widely used in the field of optoelectronics due to their excellent luminescent properties. However, CDs have difficulty achieving long-wavelength modulation due to their complex structure and unclear luminescence mechanism, which limit their application and development in reallife situations. In this work, we explored the effect of the degree of carbonization on the long-wavelength emission of CDs. In this work, blue, green, and red fluorescent CDs were prepared by a hydrothermal carbonization method using sodium lignosulfonate as a carbon source. The experimental results show that the size and graphitization degree of CDs increase gradually with increasing carbonization time, and the sp 2 structure and graphite N atoms also increase gradually, which causes the fluorescence red shift of CDs, which is verified by chemical simulation calculations. The starch was embedded in CDs to prepare tricolor phosphors, which were applied to full-color light-emitting diodes (LEDs). Finally, the combination of CDs and modules extends the range of applications for which CDs can be used. The prepared multifunctional modules that can be used for multicolor switching can be used not only for plant lighting to promote plant growth but also for indoor lighting. This work has implications for the modulation of long-wavelength emission of CD fluorescence, expanding the practical applications of LEDs prepared from CDs and promoting the development of CDs in the field of optoelectronics.

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Section: Resultsmentioning

confidence: 99%

Full-Color Fluorescence of Carbonization-Triggered Carbon Dots for Multifunctional Light Module: Implications for Plant Lighting

Zhao,

Wang,

Mao

et al. 2024

ACS Appl. Nano Mater.

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“…Among them, paperbased materials, as a derivative product derived from biomass materials, not only have some advantages of biomass materials but also have good exibility and integrity with potential as excellent energy storage materials. [23][24][25][26] Many researchers have used paper-based materials for energy storage research and have also achieved a series of good research results. Currently, paper-based materials are used as exible substrates in the eld of energy storage.…”

Section: Introductionmentioning

confidence: 99%

A multifunctional paper-based supercapacitor with excellent temperature adaptability, plasticity, tensile strength, self-healing, and high thermoelectric effects

et al. 2023

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“…In addition, they can also provide a certain amount of SSA for charge storage. However, although the macropores can serve as the ion pool for providing ions, they show a minimal contribution to the total capacitance or rate capability of ESDs, and a large amount of macropores will significantly increase the total volume of the electrode. − Therefore, to obtain a high-performance supercapacitor, regulating and maximizing the SSA and micropore/mesopore amount is of great importance.…”

Section: Introductionmentioning

confidence: 99%

Graphene Film with a Controllable Microstructure for Efficient Electrochemical Energy Storage

Jiang

Zhang

Sheng

et al. 2023

ACS Appl. Mater. Interfaces

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The agglomeration of graphene sheets and undesired pore size distribution usually lead to unsatisfactory electrochemical properties of reduced graphene oxide (RGO) film electrodes. Herein, crumpled exfoliated graphene (EG) sheets are adopted as the microstructure-regulating agent to tune the morphology and micro-/mesopore amounts with the aim of increasing active surface sites and ion transportation paths in electrodes. With the optimum ratio between EG and GO, the resulting 75%-EG/RGO shows significantly improved specific gravimetric capacitance (C s ) and rate capability when compared with pure RGO electrodes in a symmetrical supercapacitor system. Moreover, when coupling the 75%-EG/RGO cathode with a Zn anode to form a Zn ion hybrid supercapacitor (ZHS), the 75%-EG/RGO exhibits a much higher C s of 327.39 F g −1 at 0.1 A g −1 and can maintain 91.7% capacitance after 8000 cycles. Systematic ex situ X-ray diffraction (XRD) and X-ray photoelectron spectra (XPS) measurements reveal that the charge storage mechanism is based on both reversible physical adsorption and dual ion uptake. Furthermore, the quasi-solid-state flexible ZHS also presents high capacitive performance and can maintain ∼100% capacitance under various bending states, demonstrating potential application in wearable electronics. This strategy opens up a new path for constructing high-performance graphene film electrodes.

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Biochar-derived material decorated by MXene/reduced graphene oxide using one-step hydrothermal treatment as high-performance supercapacitor electrodes

Cited by 22 publications

References 43 publications

Full-Color Fluorescence of Carbonization-Triggered Carbon Dots for Multifunctional Light Module: Implications for Plant Lighting

Full-Color Fluorescence of Carbonization-Triggered Carbon Dots for Multifunctional Light Module: Implications for Plant Lighting

A multifunctional paper-based supercapacitor with excellent temperature adaptability, plasticity, tensile strength, self-healing, and high thermoelectric effects

Graphene Film with a Controllable Microstructure for Efficient Electrochemical Energy Storage

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