Single Step, Direct Pyrolysis Assisted Synthesis of Nitrogen-Doped Porous Carbon Nanosheets Derived from Bamboo wood for High Energy Density Asymmetric Supercapacitor

Gunasekaran, Sivagaami Sundari; Gopalakrishnan, Arthi; Raghu, S.; Badhulika, Sushmee

doi:10.1016/j.est.2021.103048

Cited by 55 publications

(24 citation statements)

References 33 publications

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“…The peaks witnessed at ∼ 3221, ∼1410, and ∼584 cm –1 are ascribed to −OH, NO, and Ni–C–Ni, respectively, which indicate the presence of metal by corroborating well with XRD. In addition to this, EMAC-700 showed characteristic peaks at ∼3440, ∼2887, ∼2341, ∼1640, ∼1250, and ∼1054 cm –1 attributed to −OH, C–H, CO 2 gas phase, CC, CN, and CO, respectively. , This specifies the self-doping of heteroatoms like nitrogen as well as oxygen in EMAC-700, which is effective for improving the wettability.…”

Section: Results and Discussionmentioning

confidence: 84%

“…In addition to this, EMAC-700 showed characteristic peaks at ∼3440, ∼2887, ∼2341, ∼1640, ∼1250, and ∼1054 cm −1 attributed to −OH, C−H, CO 2 gas phase, C�C, C�N, and C�O, respectively. 13,14 This specifies the self-doping of heteroatoms like nitrogen as well as oxygen in EMAC-700, which is effective for improving the wettability.…”

Section: Structural Analysismentioning

confidence: 99%

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Nickel MXene Nanosheet and Heteroatom Self-Doped Porous Carbon-Based Asymmetric Supercapacitors with Ultrahigh Energy Density

et al. 2023

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For high-energy-density supercapacitors, two-dimensional (2D) MXenes are being increasingly explored due to their inherent conductivity and excellent chemical properties. However, MXenes failed to achieve high power density and exceptional stability. Addressing this, we report the fabrication of an asymmetric supercapacitor with nickel MXene (cathode) and nitrogen (N), sulfur (S), and phosphorus (P) self-doped biomassderived activated carbon (anode). Detailed structural and chemical characterization studies reveal layered nanosheets in NiMX caused due to solvothermal etching cum exfoliation and unique micro− mesopore distribution in the optimized Euphorbia milii plant leafderived heteroatom self-doped activated carbon (EMAC-700) because of KOH activation. NiMX and EMAC-700 delivered high capacitances of 474.3 and 575.8 F/g, respectively, at 1 A/g with a 6 M KOH electrolyte. This is attributed to the pseudonature of NiMX and the presence of heteroatoms and the large surface area (2349 m 2 /g) of EMAC-700, facilitating fast electrolytic ion transfer. Finally, an asymmetric device with NiMX//EMAC configuration in 6 M KOH delivered a 152.6 F/g cell capacitance at 0.5 A/g under 0−1.5 V. Additionally, an ultrahigh energy density of 47.6 W h/kg at a 375 W/kg power density was achieved along with an 81.7% capacitance retention after 30,000 cycles at 15 A/g, signifying its potential for next-generation energy storage applications.

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Section: Results and Discussionmentioning

confidence: 84%

Section: Structural Analysismentioning

confidence: 99%

Nickel MXene Nanosheet and Heteroatom Self-Doped Porous Carbon-Based Asymmetric Supercapacitors with Ultrahigh Energy Density

et al. 2023

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“…Gunasekaran et al applied bamboo as raw material, KOH as activator, and urea as dopant to prepare nitrogen-doped porous carbon, which has a high capacitance value of 475 F g −1 at a current density of 1 A g −1 and excellent capacitance retention of 150% over 10 000 chargedischarge cycles. [176] Reproduced with permission. [176] Copyright 2021, Elsevier.…”

Section: ) Achieving Accessible Surface Areamentioning

confidence: 99%

High Mass‐Loading Biomass‐Based Porous Carbon Electrodes for Supercapacitors: Review and Perspectives

Yang

Qiu

2023

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Biomass‐based porous carbon (BPC) with renewability and flexible nano/microstructure tunability has attracted increasing attention as efficient and cheap electrode materials for supercapacitors. To meet commercial needs, high mass‐loading electrodes with high areal capacitance are preferred when designing supercapacitors. The increased mass percentage of active materials can effectively improve the energy density of supercapacitors. However, as the thickness of the electrode increases, it will face the following challenges including severely blocked ion transport channels, poor charging dynamics, poor electrode structural stability, and complex preparation processes. A bridge between theoretical research and practical applications of BPC electrodes for supercapacitors needs to be established. In this review, the advances of high mass‐loading BPC electrodes for supercapacitors are summarized based on different biomass precursors. The key performance evaluation parameters of the high mass‐loading electrodes are analyzed, and the performance influencing factors are systematically discussed, including specific surface area, pore structure, electrical conductivity, and surface functional groups. Subsequently, the promising optimization strategies for high mass‐loading electrodes are summarized, including the structure regulation of electrode materials and the optimization of other supercapacitor components. Finally, the major challenges and opportunities of high mass‐loading BPC electrodes in the future are discussed and outlined.

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“…thermal-or chemical activation) producing the porous carbon also affects the yield and quality of the electrode material and the EC characteristics of the final cell [49]. For example, chemical doping of the activated carbon with N, S, or P [50][51][52][53], or the introduction of graphitized carbon dots [54] are known to increase the capacitance of the…”

Section: Yield Analysis and Further Optimizationmentioning

confidence: 99%

From wood to supercapacitor electrode material via fast pyrolysis

Malhotra

Valiollahi

Wiinikka

2023

Journal of Energy Storage

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Single Step, Direct Pyrolysis Assisted Synthesis of Nitrogen-Doped Porous Carbon Nanosheets Derived from Bamboo wood for High Energy Density Asymmetric Supercapacitor

Cited by 55 publications

References 33 publications

Nickel MXene Nanosheet and Heteroatom Self-Doped Porous Carbon-Based Asymmetric Supercapacitors with Ultrahigh Energy Density

Nickel MXene Nanosheet and Heteroatom Self-Doped Porous Carbon-Based Asymmetric Supercapacitors with Ultrahigh Energy Density

High Mass‐Loading Biomass‐Based Porous Carbon Electrodes for Supercapacitors: Review and Perspectives

From wood to supercapacitor electrode material via fast pyrolysis

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