Ultrahigh surface area biomass derived 3D hierarchical porous carbon nanosheet electrodes for high energy density supercapacitors

Selvaraj, Aravindha Raja; Muthusamy, Anand; Inho-Cho,; Kim, Hee-Je; Senthil, Kalaiselvi; Prabakar, Kandasamy

doi:10.1016/j.carbon.2020.12.052

Cited by 192 publications

(65 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The impregnation of ZnCl2 on carbon coin provided a sponge-like pore structure which allowed activated carbon to have a combination of various sizes including micropores, mesopores, and macropores [45]. These pores store more ionic charges at the electrode/electrolyte interface while providing a 3D ion diffusion pathway [46,47]. Furthermore, they can increase and maintain the energy and power density of the supercapacitor.…”

Section: Morphological Analysismentioning

confidence: 99%

Nanofiber-enrich activated carbon coin derived from tofu dregs as electrode materials for supercapacitor

Taer

Apriwandi

Hasanah

et al. 2021

CST

View full text Add to dashboard Cite

In this study, the activated carbon with enriched nanofiber obtained from free-binder materials. It was conducted tofu dregs carbon nanofiber as electrode material for supercapacitor without the addition of pVdF/PTFE. The chemical impregnation of NaOH, ZnCl2 and H3PO4 at high-temperature pyrolysis in an N2-CO2 environment converted the tofu dregs into carbon coin. Subsequently, the physical properties including, microcrystalline, morphology, element analysis, and electrochemical properties of specific capacitance were investigated. The morphological structure of activated carbon showed high nanofiber density and was decorated by sponge-like pores. In addition, the nanofiber contains oxygen content of 12.70% which can act as self-doping due to the pseudo-capacitance properties. Furthermore, the two-electrode system obtained a specific capacitance of 163 F g-1 in 1 M H2SO4 electrolyte. The results showed that tofu dregs-based activated carbon coins are sustainable and efficient to obtain high-dense nanofiber structure as electrode materials for energy storage applications.

show abstract

Section: Morphological Analysismentioning

confidence: 99%

Nanofiber-enrich activated carbon coin derived from tofu dregs as electrode materials for supercapacitor

Taer

Apriwandi

Hasanah

et al. 2021

CST

View full text Add to dashboard Cite

show abstract

“…Remarkably, the SC based on EG exhibits a high energy density of 58.7 Wh kg −1 at a power density of 1.4 and 30.3 Wh kg −1 at a power density of 42 kW kg −1 , outperforming those newly reported carbon‐based aqueous symmetric SCs (Figure 4e and Table S3, Supporting Information). [ 31–45 ] The well performance of SC using 95EG‐H 2 O could be mostly ascribed to its wider ESW and higher operation voltage. Long‐term cycling stability is also the key criterion for the practical application of the SC.…”

Section: Resultsmentioning

confidence: 99%

Small‐Molecular Crowding Electrolyte Enables High‐Voltage and High‐Rate Supercapacitors

et al. 2021

View full text Add to dashboard Cite

Aqueous energy storage devices attract increased attention due to their high safety, low cost, and easy maintenance. However, the low energy density caused by the narrow electrochemical stability window (ESW) of aqueous electrolytes severely restricts their widespread applications. Herein, a new type of “small‐molecule crowding” electrolyte of 95EG‐H2O (95 wt% ethylene glycol [EG]) is proposed for the first time. Significant enhancement of water molecular stability is accomplished through the engineering of a hydrogen bond network. The small‐molecular crowding agent (EG) not only expands the ESW to 3.2 V, but also endows the electrolyte with low viscosity. As a proof‐of‐concept device, the symmetry carbon‐based supercapacitor using the newly developed electrolyte exhibits a so far record‐high operating voltage of 2.8 V, a high energy density of 58.7 Wh kg−1 at a power density of 1.4 and 30.3 Wh kg−1 at a power density of 42 kW kg−1, and a durable lifespan exceeding 20 000 cycles at a current density of 5 A g−1.

show abstract

“…For better understanding, the specific capacitance of HOMAC‐3 and some of those in literature reports are summarized in Table 2. Intuitively, the long fibrous plants derived carbonaceous electrodes (such as jute fiber, [64] soybean root, [65] Prosopis Juliflora wood waste carbon blocks, [66] cotton cellulose, [67] houttuynia, [40] cotton stalk [18] and HOMAC‐3) are superior or comparable to other biomass without fibrous features, such as pine nut shells, [68] soybean meal, [69] potato peel, [70] borassus flabellifer flower, [39] alfalfa flowers, [31] malva nut, [42] gardenia jasminoides ellis flowers, [71] lotus leaves, [72] sugarcane bagasse [73] and chitin [74] …”

Section: Resultsmentioning

confidence: 99%

Highly Ordered Micropores Activated Carbon from Long Fiber Biomass for High Energy Density Supercapacitors

Zhang

Tian

et al. 2021

ChemistrySelect

View full text Add to dashboard Cite

The electrochemical performance of carbon based supercapacitors not only depends on the specific surface area and conductivity, but also the structure of materials. In order to construct the carbon materials with effective structure, the long fibrous plant‐saussurea involucrata stalk was chosen as the new style carbon source. Highly ordered micropores activated carbon (HOMAC) materials have been successfully obtained via KOH chemical activation method. The synthesized HOMAC exhibits high specific surface area of 2692 m2 g−1 and pore volume of 1.14 cm3 g−1. The assembled HOMAC‐based electrode can deliver a high specific capacitance of 379 F g−1 at 2 mV s−1 in 1 M H2SO4 aqueous electrolyte, and show excellent cyclic stability (the capacitance retention ∼95 %) over 10000 cycles at a current density of 1 A g−1, which authenticates excellent charge storage capacity of electrode material. Moreover, the operation voltage window can be expanded to 0–1.8 V in 1 M Na2SO4 electrolyte for the 2‐electrode system. The symmetric supercapacitor can deliver a high energy density of 33.91 Wh kg−1 at power density of 180.03 W kg−1. These high performances can be ascribed to the high surface area and ordered microporous structures obtained using KOH as activator. We further discussed the relationship between fibrous plants and electrochemical performances of the final activated carbon materials. This present work can provide beneficial guidance for the preparation of high performance activated carbon electrodes from a biomass‐based carbon source. Comparing with two different biomass materials, it can be found that the ionic diffusion coefficient of saussurea involucrata is 5.074×10−13 m2 s−1, which is 2.5 times of cotton stalk (1.547×10−13 m2 s−1). This phenomenon indicates the different ion transmission rate in different pore structures.

show abstract

Ultrahigh surface area biomass derived 3D hierarchical porous carbon nanosheet electrodes for high energy density supercapacitors

Cited by 192 publications

References 64 publications

Nanofiber-enrich activated carbon coin derived from tofu dregs as electrode materials for supercapacitor

Nanofiber-enrich activated carbon coin derived from tofu dregs as electrode materials for supercapacitor

Small‐Molecular Crowding Electrolyte Enables High‐Voltage and High‐Rate Supercapacitors

Highly Ordered Micropores Activated Carbon from Long Fiber Biomass for High Energy Density Supercapacitors

Contact Info

Product

Resources

About