Modulating surface chemistry of heteroatom-rich micropore carbon cloth electrode for aqueous 2.1 V high-voltage window all-carbon supercapacitor

Qin, Tianfeng; Chen, Hangda; Zhang, Yanan; Chen, Xueting; Liu, Li; Yan, Dingshun; Ma, Shuai; Hou, Juan; Ye, Feng; Peng, Shanglong

doi:10.1016/j.jpowsour.2019.05.004

Cited by 37 publications

(24 citation statements)

References 34 publications

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“…These Na-containing functional groups effectively suppress hydrogen evolution reaction by keeping H + away from carbon surface, thus widening potential windows in aqueous electrolytes. [143][144][145] In addition, a more effective way is to directly synthesize carbon materials with less oxygen functional groups and defects. Tong et al [146] reported a strategy to prepare ACs with the aid of NaNO 3 as both activation agent and template.…”

Section: Pseudocapacitance and Operating Voltagementioning

confidence: 99%

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Perspective on High‐Energy Carbon‐Based Supercapacitors

Dou

Park

2020

Energy & Environ Materials

165

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Supercapacitors based on carbon materials have advantages such as high power density, fast charging/discharging capability, and long lifetime stability, playing a vital role in the field of electrochemical energy storage technologies. To further expand the practical applications of carbon-based supercapacitors, their energy density, which is essentially determined by the specific capacitance and operating voltage, should be improved. This review provides fundamental knowledge on achieving high energy density of supercapacitors. We first address the relationship of the features of carbon materials, such as the surface area, pore size distribution, and surface functional groups, with their electrochemical performances, such as the gravimetric and volumetric capacitance, surface pseudocapacitance, and operating voltage. Then, we discuss the properties of electrolytes from nonaqueous and aqueous to hybrid one from the thermodynamic and kinetic aspects, and present their effects on capacitance and operating voltage. Finally, we illustrate different cell design strategies and their basic principles for increasing operating voltage. We also highlight the recent advances related to these fields and provide our insight into high-energy supercapacitors.

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Section: Pseudocapacitance and Operating Voltagementioning

confidence: 99%

“…These Na‐containing functional groups effectively suppress hydrogen evolution reaction by keeping H + away from carbon surface, thus widening potential windows in aqueous electrolytes. [ 143–145 ]…”

Section: Carbon‐based Electrode Materialsmentioning

confidence: 99%

Perspective on High‐Energy Carbon‐Based Supercapacitors

Dou

Park

2020

Energy & Environ Materials

165

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“…Adapted with permission from Ref. [ 28 ]. e CV curves of the Na 0.25 MnO 2 and the ERPC electrodes in separate potential ranges at a scan rate of 25 mV s −1 .…”

Section: Modifying the Electrode Materialsmentioning

confidence: 99%

“…The other is the unsuitable electrode potential range. Owing to the different storage energy mechanisms, positive electrode and negative electrode possess their separate potential range [ 28 ]. When they are assembled as an intact aqueous SCs, the cell voltage is dictated by two electrodes.…”

Section: Introductionmentioning

confidence: 99%

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Recent Advances on Boosting the Cell Voltage of Aqueous Supercapacitors

et al. 2020

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• High-voltage aqueous supercapacitors hold promise for commercial energy storage devices due to the excellent electrochemical performance. • This review summarizes the efficacious measures on boosting the cell voltage of aqueous supercapacitors from the aspects of electrode, electrolyte, and asymmetric design. ABSTRACT Due to its ultra-fast charge/discharge rate, long cyclic life span, and environmental benignity, aqueous supercapacitor (SC) is considered as a proper nextgeneration energy storage device. Unfortunately, limited by undesirable water electrolysis and unreasonable electrode potential range, aqueous SC normally generates a narrow cell voltage, resulting in a low energy density. To address such challenge, enormous efforts have been made to construct high-voltage aqueous SCs. Despite these achievements, the systematic reviews about this field are still rare. To fill this knowledge gap, this review summarizes the recent advances about boosting the cell voltage of aqueous SCs. From the viewpoint of electrode, doping alkali cations, modulating the electrode mass ratio, and optimizing the surface charge density are regarded as three effective pathways to achieve this goal. However, adjusting the appropriate pH level, introducing redox mediators, and constructing "water-in-salt" electrolyte are other three universal routes from the electrolyte aspect. Furthermore, it is also effective to obtain the high-voltage aqueous SCs through asymmetric design, such as designing asymmetric SCs. The confronting challenges and future development tendency towards the high-voltage aqueous SCs are further discussed.

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Surface Engineering of Carbon via Coupled Porosity Tuning and Heteroatom‐Doping for High‐Performance Flexible Fibrous Supercapacitors

Lee

2021

Adv Funct Materials

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Flexible fibrous supercapacitors (FFS) are considered the next-generation wearable energy storage devices because they provide reliable safety, ecofriendliness, and high power density. In particular, the FFS is desirable for application to wearable electronics because it can overcome disadvantages of the lithium-ion battery (LIB), such as the hazard of explosion and the complex manufacturing process. Nevertheless, the practical application of the FFS continues to be inhibited by the poor energy storage performance due to the limited specific surface area, poor electrical properties, and low wettability of the carbon fiber electrode. Herein, for the first time, the surface engineering of an FFS using nitrogen and fluorine codoped mesoporous carbon fibers (FFS-NFMCF) is described, and the synergistic effect of porosity tuning and heteroatom codoping upon the electrochemical performance is demonstrated. The resultant supercapacitor shows a high specific capacitance of 243.9 mF cm −2 at a current density of 10.0 µA cm −2 and good ultrafast cycling stability with capacitance retention of 91.3% for up to 10 000 cycles at a current density of 250.0 µA cm −2 . More interestingly, the FFS-NFMCF exhibits good mechanical properties and remarkable safety in practical application, thus demonstrating its feasibility for use in wearable electronic textiles.

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Modulating surface chemistry of heteroatom-rich micropore carbon cloth electrode for aqueous 2.1 V high-voltage window all-carbon supercapacitor

Cited by 37 publications

References 34 publications

Perspective on High‐Energy Carbon‐Based Supercapacitors

Perspective on High‐Energy Carbon‐Based Supercapacitors

Recent Advances on Boosting the Cell Voltage of Aqueous Supercapacitors

Surface Engineering of Carbon via Coupled Porosity Tuning and Heteroatom‐Doping for High‐Performance Flexible Fibrous Supercapacitors

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Modulating surface chemistry of heteroatom-rich micropore carbon cloth electrode for aqueous 2.1 V high-voltage window all-carbon supercapacitor

Cited by 37 publications

References 34 publications

Perspective on High‐Energy Carbon‐Based Supercapacitors

Perspective on High‐Energy Carbon‐Based Supercapacitors

Recent Advances on Boosting the Cell Voltage of Aqueous Supercapacitors

Surface Engineering of Carbon via Coupled Porosity Tuning and Heteroatom‐Doping for High‐Performance Flexible Fibrous Supercapacitors

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Product

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Modulating surface chemistry of heteroatom-rich micropore carbon cloth electrode for aqueous 2.1 V high-voltage window all-carbon supercapacitor