Hierarchically porous carbon derived from tobacco waste by one-step molten salt carbonization for supercapacitor

Liu, Yuxuan; Cheng, Xinhua; Zhang, Shenghui

doi:10.1007/s42823-021-00271-0

Cited by 22 publications

(2 citation statements)

References 75 publications

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“…The molten salt method, as an emerging synthesis method, is highly attractive as it has the following advantages: 47,50 (a) the precursors used in the preparation of carbon based materials are diverse, including waste biomass, graphite, carbon containing organic compounds, carbides, and CO 2 . [51][52][53][54] (b) The template/structure directing impact of liquid salt ions can produce pores in carbon materials and facilitate the creation of ion channels. 55 (c) Due to the strong polarization effect in salts, the stability of chemical bonds in the precursor materials can be reduced, which leads to a decrease of the reaction temperature.…”

Section: Yunping Mamentioning

confidence: 99%

Molten salt technique for the synthesis of carbon-based materials for supercapacitors

Yang,

Ma,

et al. 2023

Green Chem.

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Section: Yunping Mamentioning

confidence: 99%

Molten salt technique for the synthesis of carbon-based materials for supercapacitors

Yang,

Ma,

et al. 2023

Green Chem.

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“…Hence, various studies have been conducted in regards to recycling tobacco waste [6,7]. From tobacco waste, Liu et al fabricated hierarchically porous carbon materials suited for high-performance supercapacitor electrodes [8]. Jekal et al fabricated a flexible all-solid-state supercapacitor device by fully recycling heated tobacco waste using the polylactic acid gelation method [9].…”

Section: Introductionmentioning

confidence: 99%

Preparation of a High-Performance Asymmetric Supercapacitor by Recycling Aluminum Paper and Filter Components of Heated Tobacco

Kim,

Jekal,

Kim

et al. 2023

Materials

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In this study, Al paper and cellulose acetate (CA) filters derived from heated tobacco waste were successfully converted into current collectors and active materials for a supercapacitor device. Typically, heated tobacco contains electrically discontinuous Al paper. First, Al was extracted from the tobacco waste using HCl to produce Lewis acid (AlCl3). This acid was then used in an Al electrodeposition process utilizing the chloroaluminate ionic liquid reaction between the acid and the base (RCl) at room temperature. To enhance the conductivity, a supplementary coating of Al metal was applied to the Al paper through electrodeposition, thus re-establishing the electrical continuity of the discontinuous parts and forming an Al-coated current collector. Moreover, the CA filters were carbonized under a nitrogen atmosphere, yielding carbon precursors (C-CA) for the supercapacitor electrodes. To further enhance the electrochemical performance, nickel oxide (NiO) was incorporated into C-CA, resulting in C-CA@NiO with pseudocapacitance. The specific surface area of CA increased with carbonization and the subsequent incorporation of NiO. The as-synthesized C-CA and C-CA@NiO materials were applied to an Al-coated current collector to obtain C-CA- and C-CA@NiO-based electrodes, exhibiting stable electrochemical behavior in the voltage range of −1.0 to 0 V and 0 to 1.0 V, respectively. An asymmetric supercapacitor (ASC) device was assembled with C-CA@NiO and C-CA as the positive and negative electrodes, respectively. This ASC device demonstrated a high specific capacitance of 40.8 F g−1, while widening the operating voltage window to 2.0 V. The high electrochemical performance of the device is attributed to the successful Al electrodeposition, which facilitates the electrical conductivity and increased porosity of the C-CA@NiO and C-CA materials. To the best of our knowledge, this is a pioneering study in regards to the conversion of biomass waste into current collectors and active materials to fabricate a practical ASC device. Our findings highlight the potential of reusing Al paper and CA filters from heated tobacco waste as essential components of energy storage devices.

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Molten‐Salt Synthesis of Anthracite‐Based Porous Carbon for Microscale Supercapacitors and Strain Sensors

Huang,

Zhu,

Guan

et al. 2023

Adv Materials Technologies

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The molten‐salt synthesis and electrochemical capacitive behaviors of porous carbon are reported using anthracite as the precursor. Upon synthesis, the binary KCl/K2CO3 molten salt not only exfoliates bulky anthracite to carbon nanosheets but also creates rich micro‐ and mesopores in the structure. The resulting porous carbon shows a large surface area of 1399.7 m2 g−1 and a total pore volume of 1.50 cm3 g−1. In 6.0 mol L−1 KOH aqueous electrolyte, it delivers a high specific capacitance of 245.6 F g−1 at a current density of 0.5 A g−1. Flexible micro‐supercapacitors with this porous carbon are assembled following an interdigitated design. The micro‐supercapacitor affords an area capacitance of 18.0 mF cm−2 and an energy density of 1.58 µWh cm−2 at a power density of 20 µW cm−2, and sustains 89.6% of the capacitance after 2000 cycles. Furthermore, the strain sensor fabricated by replacing the current‐collecting fluid at both ends of the electrode provides consistent and stable signal output, regardless of the degree of bending and the number of cycles. This study demonstrates the great potential of anthracite‐based porous carbon in flexible energy and electronic microdevices.

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Hierarchically porous carbon derived from tobacco waste by one-step molten salt carbonization for supercapacitor

Cited by 22 publications

References 75 publications

Molten salt technique for the synthesis of carbon-based materials for supercapacitors

Molten salt technique for the synthesis of carbon-based materials for supercapacitors

Preparation of a High-Performance Asymmetric Supercapacitor by Recycling Aluminum Paper and Filter Components of Heated Tobacco

Molten‐Salt Synthesis of Anthracite‐Based Porous Carbon for Microscale Supercapacitors and Strain Sensors

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