Mass production of hierarchically porous carbon nanosheets by carbonizing “real-world” mixed waste plastics toward excellent-performance supercapacitors

Wen, Yanliang; Kierzek, Krzysztof; Chen, Xuecheng; Gong, Jiang; Liu, Jie; Niu, Ran; Mijowska, Ewa; Tang, Tao

doi:10.1016/j.wasman.2019.03.006

Cited by 93 publications

(49 citation statements)

References 68 publications

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“…Therefore, PCS-MnO 2 -2 loaded with a suitable amount of MnO 2 , can maintain a suitable porous characteristic while introducing pseudo-capacitance and displays high capacitances and excellent rate capabilities. Figure 6 c shows that the specific capacitance still has a retention rate of 90.1% over 5000 times GCD cycles at a current density of 10 A g −1 , the value is higher than those of PET-derived carbon materials previously reported ( Supplementary Table S1 ) [ 46 , 47 ], which demonstrates the excellent cyclic stability of PCS-MnO 2 -2 composite.…”

Section: Resultsmentioning

confidence: 78%

Controllable Carbonization of Plastic Waste into Three-Dimensional Porous Carbon Nanosheets by Combined Catalyst for High Performance Capacitor

Liu

et al. 2020

Nanomaterials

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Polyethylene terephthalate (PET) plastic has been extensively used in our social life, but its poor biodegradability has led to serious environmental pollution and aroused worldwide concern. Up to now, various strategies have been proposed to address the issue, yet such strategies remain seriously impeded by many obstacles. Herein, waste PET plastic was selectively carbonized into three-dimensional (3D) porous carbon nanosheets (PCS) with high yield of 36.4 wt%, to be further hybridized with MnO2 nanoflakes to form PCS-MnO2 composites. Due to the introduction of an appropriate amount of MnO2 nanoflakes, the resulting PCS-MnO2 composite exhibited a specific capacitance of 210.5 F g−1 as well as a high areal capacitance of 0.33 F m−2. Furthermore, the PCS-MnO2 composite also showed excellent cycle stability (90.1% capacitance retention over 5000 cycles under a current density of 10 A g−1). The present study paved an avenue for the highly efficient recycling of PET waste into high value-added products (PCSs) for electrochemical energy storage.

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Section: Resultsmentioning

confidence: 78%

Controllable Carbonization of Plastic Waste into Three-Dimensional Porous Carbon Nanosheets by Combined Catalyst for High Performance Capacitor

Liu

et al. 2020

Nanomaterials

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“…22 Recently, we used waste plastics (five real-world components) as the carbon sources to produce porous carbon nanosheet (PCNS) on organically modified montmorillonite (OMMT). 23 But the controllable carbonization of waste polyesters with polar structures has not been achieved yet, which is of great significance to reutilize the realworld waste plastics. Typically, PET is widely used as packaging materials for food and consumer products.…”

Section: Introductionmentioning

confidence: 99%

Porous carbon nanosheet with high surface area derived from waste poly(ethylene terephthalate) for supercapacitor applications

Wen

Kierzek

Min

et al. 2019

J of Applied Polymer Sci

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Converting waste plastics into valuable carbon materials has obtained increasing attention. In addition, carbon materials have shown to be the ideal electrode materials for double-layer supercapacitors owing to their large specific surface area, high electrical conductivity, and stable physicochemical properties. Herein, an easily operated approach is established to efficiently convert waste poly(ethylene terephthalate) beverage bottles into porous carbon nanosheet (PCNS) through the combined processes of catalytic carbonization and KOH activation. PCNS features an ultrahigh specific surface area (2236 m 2 g −1 ), hierarchically porous architecture, and a large pore volume (3.0 cm 3 g −1 ). Such excellent physicochemical properties conjointly contribute to the outstanding supercapacitive performance: 169 F g −1 (6 M KOH) and 135 F g −1 (1 M Na 2 SO 4 ). Furthermore, PCNS shows a high capacitance of 121 F g −1 and a corresponding energy density of 30.6 Wh kg −1 at 0.2 A g −1 in the electrolyte of 1 M TEATFB/PC. When the current density increases to 10 A g −1 , the capacitance remains at 95 F g −1 , indicating the extraordinary rate capability. This work not only proposes a facile approach to synthesize PCNS for supercapacitors, but also puts forward a potential sustainable way to recycle waste plastics and further hopefully mitigates the waste plastics-related environmental issues.

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“…Levendis' group [24,25] reported the synthesis of CNTs from recycled PE using a pyrolysiscombustion technique. We put forward the controlled carbonization of polymers to prepare CNTs and carbon nanosheets using combined catalysts or active templates [26][27][28]. Unfortunately, in most of these above cases, the corrosive acids or alkalis are required to remove the remained catalysts or templates for purifying carbon products, which makes the production process cumbersome.…”

Section: Introductionmentioning

confidence: 99%

High-performance solar vapor generation of Ni/carbon nanomaterials by controlled carbonization of waste polypropylene

et al. 2020

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Solar vapor generation is emerging as a promising technology using solar energy for various applications including desalination and freshwater production. However, from the viewpoints of industrial and academic research, it remains challenging to prepare low-cost and high-efficiency photothermal materials. In this work, we report the controlled carbonization of polypropylene (PP) using NiO and poly(ionic liquid) (PIL) as combined catalysts to prepare a Ni/carbon nanomaterial (Ni/CNM). The morphology and textural property of Ni/CNM are modulated by adding a trace amount of PIL. Ni/CNM consists of cup-stacked carbon nanotubes (CS-CNTs) and pear-shaped metallic Ni nanoparticles. Due to the synergistic effect of Ni and CS-CNTs in solar absorption, Ni/CNM possesses an excellent property of photothermal conversion. Meanwhile, Ni/CNM with a high specific surface area and rich micro-/meso-/macropores constructs a threedimensional (3D) porous network for efficient water supply and vapor channels. Thanks to high solar absorption, fast water transport, and low thermal conductivity, Ni/CNM exhibits a high water evaporation rate of 1.67 kg m −2 h −1 , a solar-to-vapor conversion efficiency of 94.9%, and an excellent stability for 10 cycles. It also works well when converting dyecontaining water, seawater, and oil/water emulsion into healthy drinkable water. The metallic ion removal efficiency of seawater is 99.99%, and the dye removal efficiency is >99.9%. More importantly, it prevails over the-state-of-art carbonbased photothermal materials in solar energy-driven vapor generation. This work not only proposes a new sustainable approach to convert waste polymers into advanced metal/ carbon hybrids, but also contributes to the fields of solar energy utilization and seawater desalination.

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Mass production of hierarchically porous carbon nanosheets by carbonizing “real-world” mixed waste plastics toward excellent-performance supercapacitors

Cited by 93 publications

References 68 publications

Controllable Carbonization of Plastic Waste into Three-Dimensional Porous Carbon Nanosheets by Combined Catalyst for High Performance Capacitor

Controllable Carbonization of Plastic Waste into Three-Dimensional Porous Carbon Nanosheets by Combined Catalyst for High Performance Capacitor

Porous carbon nanosheet with high surface area derived from waste poly(ethylene terephthalate) for supercapacitor applications

High-performance solar vapor generation of Ni/carbon nanomaterials by controlled carbonization of waste polypropylene

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