Enhancement in electrochemical performance of nitrogen-doped hierarchical porous carbon-based supercapacitor by optimizing activation temperature

Tang, Lin; Zhou, Yibei; Chai, Yuru; Zheng, Qiaoji; Lin, Dunmin

doi:10.1007/s10854-018-0535-6

Cited by 19 publications

(9 citation statements)

References 80 publications

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“…In recent years, bio-solid waste has been considered to be a carbon precursor for the preparation of biochars [ 3 ]. Successful attempts have been made to convert keratinous waste from the food industry and breeding industry, including feathers [ 4 ], ox horns [ 5 ], and pig nails [ 6 ]. Owing to the unique microscopic morphology, high specific surface area, and diverse elemental composition of biochars, increasing attention has been paid to potential applications in adsorption [ 7 ], electro-catalysis [ 8 ], and electrodes [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Preparing Biochars from Cow Hair Waste Produced in a Tannery for Dye Wastewater Treatment

Song

Wang

et al. 2021

Materials

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A large amount of cow hair solid waste is produced in leather production, and a reasonable treatment should be developed to reduce the pollution. In this study, cow hair waste was utilized as the carbon precursor, and N2 was determined to be the most appropriate atmosphere for biochar preparation. We performed a comparison of the properties of biochars that were prepared with different methods, including direct pyrolysis, KOH activation, and the MgO template method. The characterization results show that the highest specific surface area reaches 1753.075 m2/g. Subsequently, the keratin that was extracted from cow hair and purified was used to prepare a biochar with the MgO template method, obtaining an orderly sponge structure. The biochar from cow hair waste was further used to absorb direct blue dye wastewater, and its adsorption capacity reached 1477 mg/g after 10 h with a high efficiency of regeneration. This study successfully utilized keratin-containing hair waste and provides a new source for synthesizing carbon materials for dye wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

Preparing Biochars from Cow Hair Waste Produced in a Tannery for Dye Wastewater Treatment

Song

Wang

et al. 2021

Materials

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“…Using pig nail as N-rich biomass, a porous carbon was fabricated by carbonization and KOH activation. The supercapacitor derived from this product exhibited a remarkable energy density of 29.43 Wh/kg (Tang et al, 2019). An N-enriched biochar was fabricated from the natural casing, an inherently tough translucent film consisting of fat and protein, and exhibited a desirable SSA (3,100 m 2 /g), high N content (6.34 at.%), and high specific capacitance (307.5 F/g at 0.5 A/g) .…”

Section: Animal-based N Self-doped Biocharmentioning

confidence: 99%

A state-of-the-art review of N self-doped biochar development in supercapacitor applications

Liu

Yang

2023

Front. Energy Res.

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Due to its renewability, eco-friendliness, and cost-effectiveness, biochar is a promising alternative to fossil fuel-based carbon for electrode material application in supercapacitors. However, pristine biochar often exhibits poor structure and low activity, which strongly inhibit its commercial utilization. N-doping is an efficient way to improve the electrochemical performance of biochar by enhancing the conductivity and surface wettability that further induce a pseudo-capacitance effect. Compared with external doping, the synthesis of N self-doped biochar from natural N-rich biomass without using external N precursors, which are harmful and costly, has attracted increasing attention. Few reviews of N-doped biochar applications in supercapacitors are available, and studies of N self-doped biochar are still scarce. This paper reviews the developments over the past 10 years on the preparation, activation, and application of N self-doped biochar in supercapacitors. Notably, the evolution of N-functionalities during N self-doped biochar production with or without activating agents was analyzed. The relationships between N content and the specific capacitance and the contribution of N self-doping-induced pseudo-capacitance to the total specific capacitance are also discussed. Finally, the challenges and the prospects of N self-doped biochar applications in supercapacitors are proposed.

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“…HA is interspersed in collagen as inorganic frameworks and nanostructured templates to provide porous structure. [61,64,65,[81][82][83][84][85][86] The 3D porous carbon skeleton of bone can be preserved after the removal of the inorganic components. Using bovine bone as the precursor, a porous carbon network was synthesized through direct carbonization.…”

Section: Carbonized Collagen As Electrode Materials For Scsmentioning

confidence: 99%

Collagen‐Based Flexible Electronic Devices for Electrochemical Energy Storage and Sensing

Zhang

Liu

et al. 2023

Macromol. Rapid Commun.

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The development of high‐performance and low‐cost, flexible electronic devices is a crucial prerequisite for emerging applications of energy storage, conversion, and sensing system. Collagen as the most abundant structural protein in mammals, owing to the unique amino acid composition and hierarchical structure, the conversion of collagen into collagen‐derived carbon materials with different nanostructures and abundant ideal heteroatom doping through the carbonization method is expected to be a promising candidate material for electrodes of energy storage devices. The excellent mechanical flexibility of collagen and the abundant functional groups on its molecular chain that are easy to modify provide the possibility to be used as a separator material. On this basis, the ideal biocompatibility and degradability provide unique conditions for it to match the flexible substrate material of the human body for wearable electronic skin. In this review, the unique characteristics and advantages of collagen for electronic devices are first summarized. Recent progress in designing and constructing collagen‐based electronic devices for future applications of electrochemical energy storage and sensing are reviewed. Finally, the challenges and prospects for collagen‐based flexible electronic devices are discussed.

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Enhancement in electrochemical performance of nitrogen-doped hierarchical porous carbon-based supercapacitor by optimizing activation temperature

Cited by 19 publications

References 80 publications

Preparing Biochars from Cow Hair Waste Produced in a Tannery for Dye Wastewater Treatment

Preparing Biochars from Cow Hair Waste Produced in a Tannery for Dye Wastewater Treatment

A state-of-the-art review of N self-doped biochar development in supercapacitor applications

Collagen‐Based Flexible Electronic Devices for Electrochemical Energy Storage and Sensing

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