Optimizing oxygen substituents of a carbon cathode for improved capacitive behavior in ethanol-based zinc-ion capacitors

Yuan, Ping; Xiao, Haoming; Li, Junyi; Luo, Jun; Luo, Xianyou; Chen, Daming; Li, De; Chen, Yong

doi:10.1016/s1872-5805(23)60733-4

Cited by 4 publications

(2 citation statements)

References 58 publications

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“…The double-layer energy storage mechanism enables nanoporous carbon electrode materials with fast dynamic characteristics and splendid physicochemical stability . To improve the capacitance performance, the introduction of defects, including intrinsic defects (such as single or multiple vacancies, edge sites, and dislocations) and external defects (such as oxygen functional groups and doped heteroatoms) has been widely used as an efficient method. − These defects can regulate the electronic configuration of carbon materials to induce more electrochemically active sites suitable for the construction of high-performance electrodes. For instance, Li et al treated commercial graphite through the ball-milling method to form different proportions: basal, edge, and defect surfaces.…”

Section: Introductionmentioning

confidence: 99%

Edge-N-Dominated Nanoporous Carbon as Electrode Materials for Enhanced Performance in Aqueous Supercapacitors

Yuan

Luo

et al. 2023

ACS Appl. Nano Mater.

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N-doped nanoporous carbon (NPC) has widely been used as electrode materials for supercapacitors owing to its high specific capacitance, superior rate capability, and long-life cycling performance. However, exploring the charge distribution mechanism of NPC with various types of N species under different charged states remains challenging. Herein, NPC derived from petroleum coke was prepared by the KOH activation method. The electrochemical testing suggested satisfactory capacitance performance of the as-obtained edge-N-dominated nanoporous carbon. An assembled symmetric supercapacitor device in a 6 M KOH electrolyte delivered a specific capacitance reaching 220 F g–1 at a current density of 1 A g–1, a value 37.5% higher than that obtained by pristine carbon (160 F g–1). The theoretical calculation results demonstrated a high adsorption capacity of edge-N toward K+. The increase in net charge on the electrode materials led to the accumulation of electrons on N-dopants, forming a negative charge center relevant to strengthening K+ adsorption. Overall, insights into the effect of N species on charge distribution in different charged states were provided, conducive to guiding the large-scale development of supercapacitors and other energy storage devices.

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Section: Introductionmentioning

confidence: 99%

Edge-N-Dominated Nanoporous Carbon as Electrode Materials for Enhanced Performance in Aqueous Supercapacitors

Yuan

Luo

et al. 2023

ACS Appl. Nano Mater.

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“…Among them, flexible supercapacitors (FSCs) are promising energy storage devices because of their good mechanical flexibility, good safety performance and low influence on performance under mechanical deformation [15][16][17][18][19]. At present, flexible supercapacitor electrodes have been developed in various carbon nanomaterials [20], metal oxides (TMOs) [21], conducting polymers (CPs) and their composites [22]. As one of the representative CPs, PPy is considered as one of the most promising materials due to its good electrical conductivity, easy synthesis, environmental friendliness, and low cost [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

A Free-Standing Polymer Polypyrrole/Cellulose Composite Film via Spatial-Confined Interfacial Electrodeposition for Flexible Supercapacitors

Wang,

Chen,

Huang

et al. 2023

Materials

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As a kind of energy storage device, a flexible supercapacitor has the characteristics of high capacity, fast charge/discharge rate, good stability, portability and softness. Conductive polymer polypyrrole (PPy) can be used as an electrode material for supercapacitors due to its environmental friendliness, simple synthesis process, good conductivity and potential for large-scale production. However, pristine PPy inevitably suffers from structural rupture due to repeated doping/de-doping during charge and discharge processes, which in turn impairs its cycle stability. In general, compounding with flexible substrates like soft carbon materials, cellulose or nylon fabric, is a good strategy to weaken the inner stress and restrain the structure pulverization of PPy. Herein, cellulose is utilized as a soft substrate to compound with PPy based on the electrochemical oxidation of polypyrrole. The interfacial electrodeposition method can successfully obtain a smooth, uniform and flexible PPy/cellulose composite film, which shows good conductivity. The assembled symmetric supercapacitor with PPy/cellulose film has an optimized specific capacitance of 256.1 mF cm−2, even after 10,000 cycles at a current density of 1 mA cm−2. Furthermore, there is no significant capacitance loss even after 180° bending of the device. This work provides a new means to prepare flexible, low-cost, environmentally friendly and high-performance electrode materials for energy conversion and storage systems.

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Structural engineering of hard carbon through spark plasma sintering for enhanced sodium-ion storage

Xiao,

Zheng,

Yuan

et al. 2024

Rare Met.

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Optimizing oxygen substituents of a carbon cathode for improved capacitive behavior in ethanol-based zinc-ion capacitors

Cited by 4 publications

References 58 publications

Edge-N-Dominated Nanoporous Carbon as Electrode Materials for Enhanced Performance in Aqueous Supercapacitors

Edge-N-Dominated Nanoporous Carbon as Electrode Materials for Enhanced Performance in Aqueous Supercapacitors

A Free-Standing Polymer Polypyrrole/Cellulose Composite Film via Spatial-Confined Interfacial Electrodeposition for Flexible Supercapacitors

Structural engineering of hard carbon through spark plasma sintering for enhanced sodium-ion storage

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