N, P co-doped hierarchical porous carbon from rapeseed cake with enhanced supercapacitance

Bi, Honghui; He, Xiaojun; Zhang, Hanfang; Li, Hongqiang; Xiao, Nan; Qiu, Jieshan

doi:10.1016/j.renene.2021.01.099

Cited by 111 publications

(35 citation statements)

References 53 publications

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“…Figure 2e shows the high-resolution P 2p spectrum, which is deconvoluted into three peaks located at 132.3, 133.2, and 134.5 eV, assigned to the PC, PN, and PO bonds, respectively. [29,31,47] The PN bond is dominant for the SPC catalyst despite the PC bond. Considering the P/N atomic ratio (≈1:2), except for the content of the PC bond (12.21%) in the SPC-2 catalyst, the main site of P doping contains PN bonding (Figure 2f).…”

Section: Resultsmentioning

confidence: 99%

“…The X‐ray diffraction (XRD) patterns of the samples in Figure a show two broad peaks at 2θ angles of 24° and 42.7°, indexed to the (002) and (101) planes of graphite for the SPC catalyst, respectively. [ 29,41–43 ] It can be seen that the degree of graphitization increased with the increase in the content of the P source in the synthesis process. A similar result was also observed in the Raman spectra, shown in Figure 2b.…”

Section: Resultsmentioning

confidence: 99%

“…Lithium-oxygen batteries (LOBs) have received increased attention because of their high theoretical energy density (up to 3600 Wh kg -1 ), which is significantly more than those of redistribution. [27][28][29] Furthermore, the N, P codoped carbon matrix can efficiently enhance the catalytic capability of the hybrid catalysts compared to the carbon matrix. [29][30][31] However, almost no improvement in the ORR/OER overpotentials and the formation of side products for the N or P-doped carbon catalyst were observed in previous works.…”

Section: Introductionmentioning

confidence: 99%

“…[27][28][29] Furthermore, the N, P codoped carbon matrix can efficiently enhance the catalytic capability of the hybrid catalysts compared to the carbon matrix. [29][30][31] However, almost no improvement in the ORR/OER overpotentials and the formation of side products for the N or P-doped carbon catalyst were observed in previous works. The catalytic mechanism and reaction kinetics of the element-doped active sites are still required to be investigated theoretically and experimentally.…”

Section: Introductionmentioning

confidence: 99%

“…P‐doped biomass‐derived cathode catalysts in LOBs exhibited enhanced cycle stability at low current densities, benefiting from the porous structure and charge redistribution. [ 27–29 ] Furthermore, the N, P codoped carbon matrix can efficiently enhance the catalytic capability of the hybrid catalysts compared to the carbon matrix. [ 29–31 ] However, almost no improvement in the ORR/OER overpotentials and the formation of side products for the N or P‐doped carbon catalyst were observed in previous works.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Surface Phosphatization for a Sawdust‐Derived Carbon Catalyst as Kinetics Promoter and Corrosion Preventer in Lithium–Oxygen Batteries

Huang

Cheng

Zhang

et al. 2022

Adv Funct Materials

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Strong oxidant intermediates and the formation of byproducts during the discharge/charge process are the main challenges in the degradation of lithium-oxygen batteries (LOBs). A facile approach to maintain the stability of the cathode catalyst and avoid the formation of byproducts is essential for the development of LOBs. Here, a sawdust-derived carbon catalyst is fabricated and subjected to surface phosphatization to suppress corrosion between carbon and electrolyte/products. This prevents the formation of byproducts from parasitic reactions and boosts the reaction kinetics of the carbon catalyst in LOBs. The doped P atoms will prior to substitute an N atom in pyrrolic-N sites to form graphitic PN sites, instead of the graphitic PC sites. Experimental and density functional theory calculations reveal that the graphitic PN sites can function as a reaction kinetics promoter for the formation/decomposition of discharge products. Moreover, the graphitic PN sites can also prevent the formation of byproduct Li 2 CO 3 from the corrosion of the carbon catalyst, despite its poor catalytic capability in LOBs. As a result, the sawdust-derived P-doped catalyst exhibits an enhanced specific capacity of ≈20 000 mAh g -1 and long cycle stability of 226 and 160 cycles at 200 and 500 mA g -1 , respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Surface Phosphatization for a Sawdust‐Derived Carbon Catalyst as Kinetics Promoter and Corrosion Preventer in Lithium–Oxygen Batteries

Huang

Cheng

Zhang

et al. 2022

Adv Funct Materials

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Activation‐Induced Surface Modulation of Biowaste‐Derived Hierarchical Porous Carbon for Supercapacitors

et al. 2022

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Wheat straw-derived carbon from the Wheatbelt region in Western Australia was subjected to chemical activation in an electrolyte containing either acid or base treatment. The findings showed an increase in electron/hole mobility towards the interfaces due to the presence of different surface functional groups such as CÀ SO x À C and S=C in the carbon framework for acid activation. Likewise, the galvanostatic capacitance measured at a current density of 2 mA cm À 2 in a three-electrode configuration for acid-activated wheat straw exhibited 162 F g À 1 , while that for base-activated wheat straw exhibited 106 F g À 1 . An increase of 34.5 % more capacitance was achieved for acid-treated wheat straw. This improvement is attributed to the synergistic effects between surface functional groups and electrolyte ions, as well as the electronic structure of the porous electrode.

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Recent Trends in Supercapacitor Research: Sustainability in Energy and Materials

Chernysheva,

Smirnova,

Ananikov

2024

ChemSusChem

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Supercapacitors (SCs) have emerged as critical components in applications ranging from transport to wearable electronics due to their rapid charge‐discharge cycles, high power density, and reliability. This review offers an analysis of recent strides in supercapacitor research, emphasizing pivotal developments in sustainability, electrode materials, electrolytes, and 'smart SCs' designed for modern microelectronics with attributes such as flexibility, stretchability, and biocompatibility. Central to this discourse are two dominant electrode materials: carbon materials (CMs), primarily in Electric Double Layer Capacitors (EDLCs), and pseudocapacitive materials, involving oxides/hydroxides, chalcogenides, metal‐organic frameworks, conductive polymers and metal nitrides such as MXene. Despite EDLCs' historical use, challenges such as low energy density persist, with heteroatom introduction into the carbon lattice posed as a solution. Concurrently, pseudocapacitive materials dominate recent studies, with efficiency enhancement strategies, such as the creation of hybrids based on different types of materials, surface structural engineering and doping, under exploration. Emphasis is given to smart SCs with novel attributes such as self‐charging, self‐healing, biocompatibility, and environmentally conscious designs. In summary, the article underscores the drive in sustainable supercapacitor research to achieve high energy and power density, steering towards SCs that are efficient and versatile and involving bioderived/biocompatible SC materials.

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N, P co-doped hierarchical porous carbon from rapeseed cake with enhanced supercapacitance

Cited by 111 publications

References 53 publications

Surface Phosphatization for a Sawdust‐Derived Carbon Catalyst as Kinetics Promoter and Corrosion Preventer in Lithium–Oxygen Batteries

Surface Phosphatization for a Sawdust‐Derived Carbon Catalyst as Kinetics Promoter and Corrosion Preventer in Lithium–Oxygen Batteries

Activation‐Induced Surface Modulation of Biowaste‐Derived Hierarchical Porous Carbon for Supercapacitors

Recent Trends in Supercapacitor Research: Sustainability in Energy and Materials

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