A biomass-derived nitrogen-doped porous carbon for high-energy supercapacitor

Zhu, Youyu; Chen, Mingming; zhang, Yang; Zhao, Wenxuan; Wang, Chengyang

doi:10.1016/j.carbon.2018.09.009

Cited by 121 publications

(41 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The specific surface area of the active materials is closely related to the formation area of the electric double-layer. Highly porous carbons, whose specific surface areas are >3000 m 2 g −1 , have been produced from various precursors and via novel chemical activation techniques [5][6][7][8][9]. ACs with a high specific surface area are very effective in increasing the gravimetric energy and power density of EDLC electrodes.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ball Milling on the Electrochemical Performance of Activated Carbon with a Very High Specific Surface Area

et al. 2020

View full text Add to dashboard Cite

Activated carbon (AC) with a very high specific surface area of >3000 m2 g−1 and a number of course particles (average size: 75 µm) was pulverized by means of planetary ball milling under different conditions to find its greatest performances as the active material of an electric double-layer capacitor (EDLC) using a nonaqueous electrolyte. The variations in textural properties and particle morphology of the AC during the ball milling were investigated. The electrochemical performance (specific capacitance, rate and cyclic stabilities, and Ragone plot, both from gravimetric and volumetric viewpoints) was also evaluated for the ACs milled with different particle size distributions. A trade-off relation between the pulverization and the porosity maintenance of the AC was observed within the limited milling time. However, prolonged milling led to a degeneration of pores within the AC and a saturation of pulverization degree. The appropriate milling time provided the AC a high volumetric specific capacitance, as well as the greatest maintenance of both the gravimetric and volumetric specific capacitance. A high volumetric energy density of 6.6 Wh L−1 was attained at the high-power density of 1 kW L−1, which was a 35% increment compared with the nonmilled AC. The electrode densification (decreased interparticle gap) and the enhanced ion-transportation within the AC pores, which were attributed to the pulverization, were responsible for those excellent performances. It was also shown that excessive milling could degrade the EDLC performances because of the lowered micro- and meso-porosity and the excessive electrode densification to restrict the ion-transportation within the pores.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Ball Milling on the Electrochemical Performance of Activated Carbon with a Very High Specific Surface Area

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Among all precursors for NHPCs, biomass has been extensively concerned to prepare NHPC for SCs due to sustainability, low cost and heteroatom‐enrich [12] . Humic acids, [5b] bean dregs, [7a] bamboo bagasse, [7b] gelatin [2b] were used to prepare carbon materials for SCs. As an common economic crop, the main components of tobacco are lignin and cellulose, which make tobacco suitable for the preparation of porous carbons.…”

Section: Introductionmentioning

confidence: 99%

Tobacco‐Stem‐Derived Nitrogen‐Enriched Hierarchical Porous Carbon for High‐Energy Supercapacitor

Wang

Liu

et al. 2021

ChemistrySelect

View full text Add to dashboard Cite

Nitrogen enriched hierarchical porous carbons with high specific surface (SSA) area and well-connected pore structure are highly desirable for supercapacitor electrode materials. Herein, nitrogen enriched hierarchical porous carbon (NHPC) was prepared by pre-carbonization of tobacco stems and activation by KHCO 3. The as-prepared NHPC-800 exhibits high SSA (2691 m 2 g À 1) and high proportion of mesopore (76.5 %). NHPC-800 also shows high nitrogen content of 1.4 %. Benefited from improved pore structure and chemical composition, the obtained NHPC-800 delivered a high capacitance of 252.9 F g À 1 at 0.5 A g À 1 and 189.1 F g À 1 at 20 A g À 1 in 6 M KOH. Additionally, the symmetric supercapacitor exhibits a high energy density of 7.8 W h kg À 1 and good cycle stability with 92.6 % capacitance retention after 6000 charge/discharge cycles in 1 M Na 2 SO 4 electrolyte. The good electrochemical performance makes NHPC-800 a potential electrode material for supercapacitor.

show abstract

“…Recently, nanoporous activated carbons have received considerable interest as the leading supercapacitor electrode materials because of the low production cost, outstanding cycle stability, and excellent surface specific surface area and porosity [21][22][23][24][25]. Different porous carbon materials have been produced either from synthetic carbon sources or natural biomasses by direct carbonization or chemical activation methods as well as template method and explored as supercapacitor electrode materials [26][27][28][29][30]. Of several methods, natural biomass or agricultural wastes-derived nanoporous carbons by physical and chemical activation methods represent the feasible, scalable, and low-cost method.…”

Section: Introductionmentioning

confidence: 99%

Nanoporous Carbon Materials Derived from Washnut Seed with Enhanced Supercapacitance

Shrestha

Tamrakar

et al. 2020

Materials

View full text Add to dashboard Cite

Nanoporous activated carbons-derived from agro-waste have been useful as suitable and scalable low-cost electrode materials in supercapacitors applications because of their better surface area and porosity compared to the commercial activated carbons. In this paper, the production of nanoporous carbons by zinc chloride activation of Washnut seed at different temperatures (400–1000 °C) and their electrochemical supercapacitance performances in aqueous electrolyte (1 M H2SO4) are reported. The prepared nanoporous carbon materials exhibit hierarchical micro- and meso-pore architectures. The surface area and porosity increase with the carbonization temperature and achieved the highest values at 800 °C. The surface area was found in the range of 922–1309 m2 g−1. Similarly, pore volume was found in the range of 0.577–0.789 cm3 g−1. The optimal sample obtained at 800 °C showed excellent electrochemical energy storage supercapacitance performance. Specific capacitance of the electrode was calculated 225.1 F g−1 at a low current density of 1 A g−1. An observed 69.6% capacitance retention at 20 A g−1 indicates a high-rate capability of the electrode materials. The cycling stability test up to 10,000 cycles revealed the outstanding stability of 98%. The fascinating surface textural properties with outstanding electrochemical performance reveal that Washnut seed would be a feasible agro-waste precursor to prepare nanoporous carbon materials as a low-cost and scalable supercapacitor electrode.

show abstract

A biomass-derived nitrogen-doped porous carbon for high-energy supercapacitor

Cited by 121 publications

References 53 publications

Effect of Ball Milling on the Electrochemical Performance of Activated Carbon with a Very High Specific Surface Area

Effect of Ball Milling on the Electrochemical Performance of Activated Carbon with a Very High Specific Surface Area

Tobacco‐Stem‐Derived Nitrogen‐Enriched Hierarchical Porous Carbon for High‐Energy Supercapacitor

Nanoporous Carbon Materials Derived from Washnut Seed with Enhanced Supercapacitance

Contact Info

Product

Resources

About