Synergistic Effect of a Defect-Free Graphene Nanostructure as an Anode Material for Lithium Ion Batteries

Park, Kwang Hyun; Kim, Byung Gon; Song, Suhee

doi:10.3390/nano10010009

Cited by 11 publications

(1 citation statement)

References 21 publications

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“…Due to its natural layer-stacking structure, graphite has long been intercalated for applications in superconductivity [ 1 ], catalysts [ 2 ], hydrogen storage [ 3 ], and ion batteries [ 4 ]. Hundreds of graphite intercalation compounds have been synthesized in the past two hundred years, but the intercalants are mostly strong oxidants or reductants involving alkali metal, alkaline-earth metal, halogen, and strong oxidizing acids [ 5 , 6 , 7 , 8 ]. Different from montmorillonite [ 9 , 10 ] and layer-stacked MXenes [ 11 , 12 ], graphite possesses a reduced stacking distance of 0.34 nm and a clean interlayer space.…”

Section: Introductionmentioning

confidence: 99%

Mechanism for the Intercalation of Aniline Cations into the Interlayers of Graphite

et al. 2022

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The dynamic behaviors of aniline cation (ANI+) intercalating into graphite interlayers are systematically studied by experimental studies and multiscale simulations. The in situ intercalation polymerization designed by response surface methods implies the importance of ultrasonication for achieving the intercalation of ANI+. Molecular dynamics and quantum chemical simulations prove the adsorption of ANI+ onto graphite surfaces by cation–π electrostatic interactions, weakening the π–π interactions between graphene layers. The ultrasonication that follows breaks the hydrated ANI+ clusters into individual ANI+. Thus, the released positive charges of these dissociative cations and reduced steric hindrance significantly improve their intercalation ability. With the initial kinetic energy provided by ultrasonic field, the activated ANI+ are able to intercalate into the interlayer of graphite. This work demonstrates the intercalation behaviors of ANI+, which provides an opportunity for investigations regarding organic-molecule-intercalated graphite compounds.

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Section: Introductionmentioning

confidence: 99%

Mechanism for the Intercalation of Aniline Cations into the Interlayers of Graphite

et al. 2022

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Nanotransfer Printing of Functional Nanomaterials on Electrospun Fibers for Wearable Healthcare Applications

Ha,

Ko,

Ahn

et al. 2024

Adv Funct Materials

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With the advancement of functional textile technology, there is a growing demand for functional enhancements in textiles from both industrial and societal perspectives. Recently, nanopattern transfer technology has emerged as a potential approach for fabricating functional textiles. However, conventional transfer methods have some limitations such as transfer difficulties on curved fiber surfaces, polymer residues, and delamination of transferred nanopatterns. In this study, an advanced nanopattern transfer method based on surface modification and thermoforming principles is applied to microscale electrospun fibers. This transfer method utilizes covalent bonding and mechanical interlocking between nanopatterns and the fibers without requiring extra adhesives. Various nanopatterns transferred electrospun fibers possess significant potential for diverse wearable healthcare applications. This work introduces two specific application scenarios in the field of wearable healthcare, both of which leverage the light: diagnostics and antimicrobials. Versatile textile with silver nanogap‐pattern detects glucose in sweat, diagnosing hypoglycemia and diabetes by shifting Raman peaks from 1071.0 to 1075.4 cm−1 for 0 to 150 µm glucose. Additionally, a bactericidal mask using visible light to induce the photocatalytic degradation effect of titanium dioxide and silver nanopatterns is developed. Bactericidal efficacy against Escherichia coli and Staphylococcus aureus is 99.9% due to photolysis from visible light irradiation.

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Construction of High‐Performance Anode of Potassium‐Ion Batteries by Stripping Covalent Triazine Frameworks with Molten Salt

Zhang,

Fu,

Qiu

et al. 2024

Advanced Science

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Covalent triazine frameworks (CTFs) are promising battery electrodes owing to their designable functional groups, tunable pore sizes, and exceptional stability. However, their practical use is limited because of the difficulty in establishing stable ion adsorption/desorption sites. In this study, a melt‐salt‐stripping process utilizing molten trichloro iron (FeCl3) is used to delaminate the layer‐stacked structure of fluorinated covalent triazine framework (FCTF) and generate iron‐based ion storage active sites. This process increases the interlayer spacing and uniformly deposits iron‐containing materials, enhancing electron and ion transport. The resultant melt‐FeCl3‐stripped FCTF (Fe@FCTF) shows excellent performance as a potassium ion battery with a high capacity of 447 mAh g−1 at 0.1 A g−1 and 257 mAh g−1 at 1.6 A g−1 and good cycling stability. Notably, molten‐salt stripping is also effective in improving the CTF's Na+ and Li+ storage properties. A stepwise reaction mechanism of K/Na/Li chelation with C═N functional groups is proposed and verified by in situ X‐ray diffraction testing (XRD), ex‐situ X‐ray photoelectron spectroscopy (XPS), and theoretical calculations, illustrating that pyrazines and iron coordination groups play the main roles in reacting with K+/Na+/Li+ cations. These results conclude that the Fe@FCTF is a suitable anode material for potassium‐ion batteries (PIBs), sodium‐ion batteries (SIBs), and lithium‐ion batteries (LIBs).

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Synergistic Effect of a Defect-Free Graphene Nanostructure as an Anode Material for Lithium Ion Batteries

Cited by 11 publications

References 21 publications

Mechanism for the Intercalation of Aniline Cations into the Interlayers of Graphite

Mechanism for the Intercalation of Aniline Cations into the Interlayers of Graphite

Nanotransfer Printing of Functional Nanomaterials on Electrospun Fibers for Wearable Healthcare Applications

Construction of High‐Performance Anode of Potassium‐Ion Batteries by Stripping Covalent Triazine Frameworks with Molten Salt

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