Nitrogen‐doped self‐shrinking porous 3D graphene capacitor deionization electrode

Qian, Ming; Duan, Mengna; Gong, Zuode

doi:10.1002/er.4741

Cited by 4 publications

(3 citation statements)

References 31 publications

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“…Notably, in both the rGO and NH 3 -rGO samples, a distinct region of macropores emerged, significantly influencing key surface properties such as total pore volume (V T ) and surface area (S BET ), as detailed in Table 1 . Compatible with the previous literature, the remaining samples displayed S BET and V T values within the expected range for this sample type [ 46 ].…”

Section: Resultssupporting

confidence: 82%

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Effect of Nitrogen Dopant Agents in the Performance of Graphene-Based Cathodes for Li-S Batteries

Licari,

Benítez,

Gómez-Cámer

et al. 2024

Nanomaterials

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Lithium-sulphur (Li-S) batteries offer high energy density compared to lithium-ion batteries, emerging as a promising technology for the next generation of energy storage systems. The ongoing challenge is to improve their electrochemical performance, extend their useful life and mitigate some problems that persist in this technology, by the investigation in materials with diverse properties. This work seeks to elucidate the importance and repercussions associated with functionalisation of graphene-based materials through nitrogen incorporation (more than 9 wt.% N), employing different chemical agents such as ethylenediamine and ammonia. Herein, differences in both the textural properties and the chemical environment of nitrogen within the carbonaceous network are identified, resulting in distinct electrochemical behaviours. The electrochemical performance of electrodes prepared from ammonia-functionalised samples surpasses that of ethylenediamine-functionalised samples in terms of both efficiency and rate performance. Conversely, the ethylenediamine-functionalised samples excel in stability, showing exceptional values in capacity retention per cycle. The outcomes exceeded expectations in energy performance, allowing the Li-S cells to be subjected to ultra-high rate cycling while maintaining appropriate capacity values.

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Section: Resultssupporting

confidence: 82%

“…Compatible with the previous literature, the remaining samples displayed SBET and VT values within the expected range for this sample type [46]. X-ray photoelectron spectroscopy (XPS) measurements provide information on the chemical environment and composition of the samples.…”

Section: Characterisation Of Graphene-based Samplessupporting

confidence: 75%

Effect of Nitrogen Dopant Agents in the Performance of Graphene-Based Cathodes for Li-S Batteries

Licari,

Benítez,

Gómez-Cámer

et al. 2024

Nanomaterials

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“…The ex situ XRD patterns of the antimonene‐PAE electrode during the charge/discharge process show unchanged diffraction peaks (Figure S13, Supporting Information), indicating a double‐layer capacitance, rather than pseudocapacitance. [ 20 ] Significantly, as the scanning rate increases, the specific capacitance of antimonene‐PAE decreases less than that of bulk Sb and Antimonene‐LPE (Figure 5f), and is always higher than that of bulk Sb and Antimonene‐LPE, which can be ascribed to the ultra‐thin and large‐sized antimonene increasing the contact area of electrode/electrolyte and shortening the diffusion distance of Na + .…”

Section: Resultsmentioning

confidence: 99%

Pressurized Alloying Assisted Synthesis of High Quality Antimonene for Capacitive Deionization

Gao

Cheng

Zhang

et al. 2021

Adv Funct Materials

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Mono‐elemental antimonene as a new member of the 2D material family has recently attracted huge attention, whereas the higher chemical activity and narrower interlayer gallery have impinged the quality of product upon exfoliation from the bulk counterpart. To overcome the intrinsic drawbacks, along with the line of the liquid‐phase exfoliation (LPE) method, here, a pressurized alloying approach introduces a Li3Sb alloy intermediate at the edge region of bulk β‐phase antimony by pre‐lithiation in the presence of n‐butyllithium and internal pressure is put forward. A protonation process converts the Li3Sb to gaseous stibine (SbH3) in a liquid solution, enabling an upward buoyancy together with the endothermic opening of the galleries that facilitate the subsequent LPE. As a result, the β‐phase antimony is efficiently exfoliated into antimonene nanosheets with perfect retention of basal plane texture (lateral size of ≈3 µm and thickness of less than 2 nm). Finally, the high‐quality antimonene being simply treated with HCl enables great Na+ diffusion along the basal plane to deliver excellent capacitive deionization performance with a salt adsorption capacity of 31.4 mg g–1 at an ultra‐low NaCl concentration (135 mg L–1).

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Three-dimensional network of graphene for electrochemical capacitors and capacitive deionization

Zhu,

Deng,

et al. 2024

APL Energy

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Supercapacitors, as high-performance energy storage devices, have garnered extensive research interest. Furthermore, capacitive deionization technology based on a supercapacitor has emerged as a crucial solution to tackling issues of freshwater scarcity and seawater pollution. However, their power density and cycling lifespan remain constrained by electrode materials. In recent years, 3D network graphene materials have gained prominence as an ideal choice due to their unique porous structure, high specific surface area, and excellent conductivity. This review summarizes the preparation methods of 3D network graphene materials, including techniques like chemical vapor deposition, graphene oxide reduction, and foaming methods. It also discusses their applications and the ongoing research advancements in supercapacitor energy storage and capacitive deionization. Ultimately, this review offers researchers an understanding and outlook on the application of 3D network graphene materials in supercapacitor energy storage and capacitive deionization.

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Nitrogen‐doped self‐shrinking porous 3D graphene capacitor deionization electrode

Cited by 4 publications

References 31 publications

Effect of Nitrogen Dopant Agents in the Performance of Graphene-Based Cathodes for Li-S Batteries

Effect of Nitrogen Dopant Agents in the Performance of Graphene-Based Cathodes for Li-S Batteries

Pressurized Alloying Assisted Synthesis of High Quality Antimonene for Capacitive Deionization

Three-dimensional network of graphene for electrochemical capacitors and capacitive deionization

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