Electrochemical properties of kenaf-based activated carbon monolith for supercapacitor electrode applications

Park, Han Yul; Huang, Minhu; Yoon, Tae‐Ho; Song, Kyung Hun

doi:10.1039/d1ra07815a

Cited by 11 publications

(1 citation statement)

References 47 publications

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“…Figure 1A depicts the thermogravimetric (TGA-DTG) analysis of the nitrogen-modified carbon materials before sulfur infiltration. A first thermal event related to moisture loss can be observed for the three materials at temperatures below 150 • C. There is no evidence of significant mass losses between 200 • C and 500 • C, showing that the carbon materials are stable; nevertheless, a weight loss can be observed above 500 • C, indicating that the material was not completely carbonized [24]. Due to the structural differences between the nitrogen precursors, carbon materials generated from ethylenediamine and hexadecylamine are projected to favor aliphatic structures over those formed from melamine, whose structure is cyclic.…”

Section: Physicochemical Characterization Of the Carbon Materials And...mentioning

confidence: 89%

Influence of the Nitrogen Precursor in the Development of N-Functionalities in a Mesoporous Carbon Material and Its Effect on the Li–S Cells’ Electrochemistry

Mejía Salazar,

Acevedo,

Laverde

et al. 2024

Batteries

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Li–S batteries are positioned as a strong alternative for efficient energy storage due to their high theoretical energy density and their theoretical specific capacity (1675 mA h g−1) compared to current Li-ion batteries; however, their commercialization is affected by the rapid decay of the specific capacity as a consequence of the different species of lithium polysulfides that are generated during the charge–discharge processes. The use of nitrogen-doped mesoporous carbon materials has been shown to have the ability to confer electronic conductivity to sulfur and retain the lithium polysulfide species. However, there are not enough studies to help understand how the type of nitrogen precursor influences the development of specific nitrogen functionalities to favor the retention of lithium polysulfide species. This work seeks to determine the effect of the use of different nitrogen precursors on the structural changes of the mesoporous carbon materials prepared, and thus evaluate the electrochemical behavior of Li–S cells correlating the type of nitrogen functionality generated when the precursor is variated with the charge/discharge capacity developed during the cell operation. For this study, different carbon materials were prepared by the variation of the nitrogen source (melamine, ethylenediamine, and hexadecylamine) to obtain a N-doped mesoporous carbon with different distributions of nitrogen functionalities in its structure. The use of the primary amine ethylenediamine as a nitrogen precursor in the formation of structured carbon materials favored elemental sulfur infiltration into its pores, resulting in the maximum sulfur content within the pores and interacting with the carbonaceous matrix (78.8 wt.%). The carbon material prepared with this precursor resulted in a higher content of N-pyridinic functionality, which, combined with the high content of N-pyrrolic, resulted in the highest specific discharge capacity at 0.1 C after 100 cycles when compared to cells assembled with materials derived from the use of melamine and hexadecylamine precursors. The cell assembled with the electrode formed from ethylenediamine as a nitrogen precursor presented an initial discharge capacity of 918 mA h g−1 with a Coulombic efficiency of ~83.4% at 0.1 C after 100 cycles.

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Section: Physicochemical Characterization Of the Carbon Materials And...mentioning

confidence: 89%

Influence of the Nitrogen Precursor in the Development of N-Functionalities in a Mesoporous Carbon Material and Its Effect on the Li–S Cells’ Electrochemistry

Mejía Salazar,

Acevedo,

Laverde

et al. 2024

Batteries

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Green synthesis of Kenaf-based activated carbons with excellent rate capability and cycle-life via hydrothermal-co-activation process for high-performance capacitive energy storage

Noh,

Lee,

Kim

et al. 2024

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Discarded Perseaamericana leaf-derived natural O, Mg, and Ca self-doped activated carbon and its applications as electrode materials for high-performance symmetric supercapacitors

Armynah,

Nairanti,

Agustino

et al. 2024

Diamond and Related Materials

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Electrochemical properties of kenaf-based activated carbon monolith for supercapacitor electrode applications

Abstract: Monolithic carbon from kenaf-based fiber for supercapacitor electrode application provided a specific capacitance of 212 F g−1via GCD at 1 A g−1, converting to an energy density of 6 W h kg−1 at the power density of 215 W kg−1 as well as 95.9% retention upon 5000 cycling test.

Cited by 11 publications

References 47 publications

Influence of the Nitrogen Precursor in the Development of N-Functionalities in a Mesoporous Carbon Material and Its Effect on the Li–S Cells’ Electrochemistry

Influence of the Nitrogen Precursor in the Development of N-Functionalities in a Mesoporous Carbon Material and Its Effect on the Li–S Cells’ Electrochemistry

Green synthesis of Kenaf-based activated carbons with excellent rate capability and cycle-life via hydrothermal-co-activation process for high-performance capacitive energy storage

Discarded Perseaamericana leaf-derived natural O, Mg, and Ca self-doped activated carbon and its applications as electrode materials for high-performance symmetric supercapacitors

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