Nitrogen-Doped Banana Peel–Derived Porous Carbon Foam as Binder-Free Electrode for Supercapacitors

Liu, Bingzhi; Zhang, Lili; Qi, Peirong; Zhu, Mingyuan; Wang, Gang; Ma, Yanqing; Guo, Xuhong; Chen, Hui; Zhang, Boya; Zhao, Zhuangzhi; Dai, Bin; Ye, Feng

doi:10.3390/nano6010018

Cited by 71 publications

(27 citation statements)

References 37 publications

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“…Hence, it can be concluded that the binder content should be reduced to a minimum or that binder should even be avoided in electrode manufacturing. Liu et al already made first attempts to develop such binder-free electrodes based on banana peel (Liu et al, 2016), but this approach is relatively new and far from being able to be implemented in electrode production on an industrial scale. The higher EC values of AC-600-800-add compared to those of AC-add can be explained by the lower surface are of the commercial AC in comparison with AC-600-800 (Hoffman et al, 2018), which is a consequence of the different production process and precursor of the commercial AC (precursor: peat, carbonization temperature: 500°C, physical activation).…”

Section: Influence Of Additives On Ecmentioning

confidence: 99%

Study of the electrical conductivity of biobased carbonaceous powder materials under moderate pressure for the application as electrode materials in energy storage technologies

et al. 2018

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This study focusses on the assessment of the electrical conductivity (EC) of biobased electrode materials for the application in energy storage devices and presents a simple and reproducible method to measure the EC of carbonaceous powders under moderate pressure (10–50 N). Based on the pyrolysis of corncob at three different temperatures (600, 800, and 900°C) and further treatments of the biochar obtained at 600°C, 11 different carbonaceous powder materials were produced including biochars, activated carbons, and composites. Composite materials were obtained by adding either metal oxide (RuO2 or Fe3O4) in different proportions or additives which are commonly used in electrode production (5 wt% binder and 15 wt% conductive additive). Furthermore, one physically activated commercial AC based on peat with a known EC of 33 S/m was treated with additives and used as a reference. For all materials, an increase of applied pressure resulted in higher EC values due to closer particle contact. The comparison of two methods (with and without preload) showed that a prepelletization of the samples is not necessary to obtain reliable results. By analyzing the obtained EC values while taking mechanical and physicochemical properties into account, it could be shown that a high carbonization temperature and high specific surface area favor the increase of EC. Furthermore, certain proportions of metal oxides lead to an improvement of EC (40 wt% RuO2, 10 wt% Fe3O4), while the treatment with additives leads to a decrease of EC. The EC values among all samples varied between 0.8 S/m (biochar) and 408 S/m (AC/RuO2 composite) at the highest pressure level (637 kPa). Thus, promising biobased electrode materials for environmentally friendly energy storage technologies are presented with the aim of contributing to the establishment of a biobased resource and product platform for bioeconomy.

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Section: Influence Of Additives On Ecmentioning

confidence: 99%

Study of the electrical conductivity of biobased carbonaceous powder materials under moderate pressure for the application as electrode materials in energy storage technologies

et al. 2018

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“…The peak at 285.5 eV can be assigned to the CO/CN functional groups. The peak at 288 eV is attributed to the OCO functional groups . The oxygen spectra also consisted of three peaks (Figure c).…”

Section: Resultsmentioning

confidence: 97%

“…Carbon compounds, such as graphene, carbon nanotubes, and porous carbons, have received extensive attention as electrode materials in EDLCs. Given the need for the development of cost‐effective, well‐performing electrode materials, carbon materials that have a high specific surface area and hierarchical porous structures are an efficient way of obtaining satisfactory electrochemical performance when used as the electrodes in EDLCs .…”

Section: Introductionmentioning

confidence: 99%

Nitrogen and Sulfur Co‐Doped Graphene‐Like Carbon from Industrial Dye Wastewater for Use as a High‐Performance Supercapacitor Electrode

et al. 2019

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Nitrogen and sulfur co‐doped graphene‐like carbon (N,S‐GLC) is successfully prepared in a one‐step hydrothermal reaction of glucose with industrial dye wastewater followed by chemical activation. The nitrogen and sulfur are sourced entirely from the industrial wastewater. The process not only provides an alternative way of treating industry wastewater, but also offers a green route for recovering energy from the waste in the form of chemicals. The resultant N,S‐GLC shows a good degree of graphitization, a high specific surface area (1734 m2 g−1), and moderate heteroatom doping (N: 2.1 at%, S: 0.7 at%). The N,S‐GLC electrode displays high specific capacitance of 275 F g−1 at a current density of 0.5 A g−1 with a retention of 65.4% at 20 A g−1 in 6 m KOH. Moreover, the assembled symmetrical supercapacitor cell shows a capacitance of 38 F g−1 at a current density of 0.5 A g−1, which is equivalent to an energy density of 6.4 Wh kg−1 at a power density of 275.0 W kg−1. This approach provides an alternative and sustainable way of fabricating heteroatom‐doped graphene‐like carbon materials for use in high‐performance supercapacitors.

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“…To prepare biomass-derived carbon with superior supercapacitive performance, the following criteria should be considered: (i) the precursors with intrinsic porous structures, especially interconnected meso/microporous structures are preferred; (ii) the intrinsic microporous structures are preserved as the precursors are converted to carbon during the carbonization and activation process; (iii) low KOH/C mass ratio (~1-3) and longer activation time are suggested for the activation process in the appropriate temperature range (700-900 • C). To further compare the performance of different biomass-derived carbons in supercapacitor applications and their structure-property relationship, a detailed comparative study is presented in Table 8 [122][123][124][125][126][127][128].…”

Section: Structures and Propertiesmentioning

confidence: 99%

Design and Preparation of Biomass-Derived Carbon Materials for Supercapacitors: A Review

Liu

Chen

Cui

et al. 2018

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The synthesis and application of biomass-derived carbon in energy storage have drawn increasing research attention due to the ease of fabrication, cost-effectiveness, and sustainability of the meso/microporous carbon produced from various biological precursors, including plants, fruits, microorganisms, and animals. Compared to the artificial nanostructured carbons, such as fullerene, carbon nanotube and graphene, the biomass-derived carbons may obtain superior capacitance, rate performance and stability in supercapacitor applications ascribing to their intrinsic nanoporous and hierarchical structures. However, challenges remain in processing techniques to obtain biomass-derived carbons with high carbon yield, high energy density, and controllable graphitic microstructures, which may require a clear understanding over the chemical and elemental compositions, and the intrinsic microstructural characteristics of the biological precursors. Herein we present comprehensive analyses over the impacts of the chemical and elemental compositions of the precursors on the carbon yield of the biomass, as well as the mechanism of chemical activation on the nanoporous structure development of the biomass-derived carbons. The structure–property relationship and functional performance of various biomass-derived carbons for supercapacitor applications are also discussed in detail and compared. Finally, useful insights are also provided for the improvements of biomass-derived carbons in supercapacitor applications.

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Nitrogen-Doped Banana Peel–Derived Porous Carbon Foam as Binder-Free Electrode for Supercapacitors

Cited by 71 publications

References 37 publications

Study of the electrical conductivity of biobased carbonaceous powder materials under moderate pressure for the application as electrode materials in energy storage technologies

Study of the electrical conductivity of biobased carbonaceous powder materials under moderate pressure for the application as electrode materials in energy storage technologies

Nitrogen and Sulfur Co‐Doped Graphene‐Like Carbon from Industrial Dye Wastewater for Use as a High‐Performance Supercapacitor Electrode

Design and Preparation of Biomass-Derived Carbon Materials for Supercapacitors: A Review

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