Synthesis of chain-like nitrogen-doped carbon for high-performance supercapacitors

Chen, Guoqing; Liu, Zhenlu; Yang, Guangjie; Zhang, Qian; Lan, Tiancheng; Zhang, Chunmei; Li, Ping; Liu, Kunming; He, Shuijian

doi:10.1016/j.colsurfa.2024.133498

Cited by 8 publications

(5 citation statements)

References 74 publications

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“…Benefiting from conspicuous electrochemical performances such as high-power density, a fast charge/discharge rate, splendid cycling durability, and long lifespan, the supercapacitor has been regarded as one of the most advanced energy storage devices [ 1 , 2 , 3 , 4 , 5 ]. In terms of charge storage mechanisms, supercapacitors are mainly classified into two kinds, which are called electrical double-layer capacitors and pseudo-capacitors [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 ]. The former usually depends on carbon-based matters (e.g., porous carbon, graphene, etc.)…”

Section: Introductionmentioning

confidence: 99%

“…The former usually depends on carbon-based matters (e.g., porous carbon, graphene, etc.) to accumulate a charge at the electrode/electrolyte interface [ 3 , 4 , 5 , 6 ]. The latter stores are charged via reversible Faradaic reactions between electrolyte ions and electroactive materials (e.g., transition metal compounds, conductive polymers, etc.)…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In terms of charge storage mechanisms, supercapacitors are mainly classified into two kinds, which are called electrical double-layer capacitors and pseudo-capacitors [3][4][5][6][7][8][9][10][11]. The former usually depends on carbon-based matters (e.g., porous carbon, graphene, etc.)…”

Section: Introductionmentioning

confidence: 99%

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Porous α-Fe2O3 Hollow Rods/Reduced Graphene Oxide Composites Templated by MoO3 Nanobelts for High-Performance Supercapacitor Applications

Zhou,

Liang,

Xiao

et al. 2024

Molecules

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Porous α-Fe2O3 hollow rods/reduced graphene oxide (α-Fe2O3 HR/RGO) composites with unique morphological characteristics and a high surface area are prepared through a template strategy, which was systematically studied and found to have outstanding supercapacitive properties. When served as active material in a three-electrode setup, the optimized α-Fe2O3 HR/RGO-30, comprised 76.5 wt% α-Fe2O3 and 23.2 wt% RGO, was able to offer the largest specific capacitance of 426.3 F g−1, an excellent rate capability as well as satisfactory cycle life with capacitance retention of 87.7% and Coulombic efficiency of 98.9% after continuously charging/discharging at 10 A g−1 for beyond 10,000 cycles. Such electrochemical behaviors of the α-Fe2O3 HR/RGO-30 electrode can rival or even surpass those of many Fe2O3-based electrodes documented in the previous literature. Later, a symmetric supercapacitor cell of α-Fe2O3 HR/RGO-30//α-Fe2O3 HR/RGO-30 was fabricated. The assembled device offers the maximum energy density of 18.7 Wh kg−1, and also exhibits commendable rate capability, and features stable cycling durability (with capacitance retention of 83.2% together with a Coulombic efficiency of 99.3% after 10,000-cycle charge/discharge at 5 A g−1). These notable electrochemical performances enable the α-Fe2O3 HR/RGO-30 composite to be a high-potential material for advanced energy storage systems.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Porous α-Fe2O3 Hollow Rods/Reduced Graphene Oxide Composites Templated by MoO3 Nanobelts for High-Performance Supercapacitor Applications

Zhou,

Liang,

Xiao

et al. 2024

Molecules

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“…At kettle pressures of 1 MPa-1 GPa and temperatures of 100-1000 • C, water molecules are in a supercritical or subcritical state, which improves the performance of the chemical reactions in an aqueous solution, achieving the objective of modification and, to some extent, substituting for solid-phase reactions at high temperature [2,3]. Since the homogeneous/heterogeneous nucleation mechanism of the hydrothermal reaction differs from the diffusion mechanism of solid-phase reactions, this method creates new features not obtained by other methods [4].…”

Section: Introductionmentioning

confidence: 99%

Influence of Hydrothermal Modification on Adsorptive Performance of Clay Minerals for Malachite Green

Wang,

Huang,

et al. 2024

Molecules

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Artificially modified adsorbing materials mainly aim to remedy the disadvantages of natural materials as much as possible. Using clay materials such as rectorite, sodium bentonite and metakaolinite (solid waste material) as base materials, hydrothermally modified and unmodified materials were compared. CM-HT and CM (adsorbing materials) were prepared and used to adsorb and purify wastewater containing malachite green (MG) dye, and the two materials were characterized through methods such as BET, FT-IR, SEM and XRD. Results: (1) The optimal conditions for hydrothermal modification of CM-HT were a temperature of 150 °C, a time of 2 h, and a liquid/solid ratio 1:20. (2) Hydrothermal modification greatly increased the adsorptive effect. The measured maximum adsorption capacity of CM-HT for MG reached 290.45 mg/g (56.92% higher than that of CM). The theoretical maximum capacity was 625.15 mg/g (186.15% higher than that of CM). (3) Because Al-OH and Si-O-Al groups were reserved in unmodified clay mineral adsorbing materials with good adsorbing activity, after hydrothermal modification, the crystal structure of the clay became loosened along the direction of the c axis, and the interlayer space increased to partially exchange interlayer metal cations connected to the bottom oxygen, giving CM-HT higher electronegativity and creating more crystal defects and chemically active adsorbing sites for high-performance adsorption. (4) Chemical adsorption was the primary way by which CM-HT adsorbed cationic dye, while physical adsorption caused by developed pore canal was secondary. The adsorption reaction occurred spontaneously.

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RuO₂/Cysteine Nanocomposites for High‐Performance Supercapacitors

Zhang,

Guo,

Zhu

et al. 2024

ChemNanoMat

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RuO2/Cysteine (RuO2/Cys) nanocomposites were synthesized using a facile high‐temperature hydrothermal method, with improved specific capacitance and good electrochemical durability. The advantage of using cysteine is that its molecule is rich in ligands such as carboxyl, sulfhydryl, and amino groups, which can be easily bound to hydrated RuO2, thus facilitating its effective dispersion. Analyses of its morphology, structure, and chemical composition showed that the incorporation of L‐cysteine greatly inhibited the agglomeration of RuO2 and improved its dispersion, and the scale of RuO2 was reduced from the original micrometer scale to the nanometer scale. Such structures facilitated proton transfer and electron transfer, so RuO2/Cys nanocomposites showed significantly improved specific capacitance, up to 1221.7 F g‐1, and the energy density was up to 108.6 Wh kg‐1 with a power density of 400.2 W kg‐1 at 1 A g‐1 in a 0.5 M H2SO4 electrolyte. The combination of L‐cysteine with RuO2 also effectively prevented the deformation of RuO2 in the redox process, and the capacitance retention rate was increased to 87.7% compared to 48.8% of pristine RuO2 after 10,000 charging‐discharging cycles. High capacitance performance and improved cyclic stability enable RuO2/Cys nanocomposite a favorable electrode material for wide applications in energy storage.

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Synthesis of chain-like nitrogen-doped carbon for high-performance supercapacitors

Cited by 8 publications

References 74 publications

Porous α-Fe2O3 Hollow Rods/Reduced Graphene Oxide Composites Templated by MoO3 Nanobelts for High-Performance Supercapacitor Applications

Porous α-Fe2O3 Hollow Rods/Reduced Graphene Oxide Composites Templated by MoO3 Nanobelts for High-Performance Supercapacitor Applications

Influence of Hydrothermal Modification on Adsorptive Performance of Clay Minerals for Malachite Green

RuO₂/Cysteine Nanocomposites for High‐Performance Supercapacitors

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Synthesis of chain-like nitrogen-doped carbon for high-performance supercapacitors

Cited by 8 publications

References 74 publications

Porous α-Fe2O3 Hollow Rods/Reduced Graphene Oxide Composites Templated by MoO3 Nanobelts for High-Performance Supercapacitor Applications

Porous α-Fe2O3 Hollow Rods/Reduced Graphene Oxide Composites Templated by MoO3 Nanobelts for High-Performance Supercapacitor Applications

Influence of Hydrothermal Modification on Adsorptive Performance of Clay Minerals for Malachite Green

RuO2/Cysteine Nanocomposites for High‐Performance Supercapacitors

Contact Info

Product

Resources

About

RuO₂/Cysteine Nanocomposites for High‐Performance Supercapacitors