Preparation of Carbon Nanowall and Carbon Nanotube for Anode Material of Lithium-Ion Battery

Lee, Seokwon; Kwon, Seokhun; Kim, Kang-Min; Kang, Hyunil; Ko, Jang Myoun; Choi, Won Seok

doi:10.3390/molecules26226950

Cited by 10 publications

(5 citation statements)

References 17 publications

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“…When MoS 2 :graphite = 20%:80%, the charge-transfer impedance is the smallest, and its slope in the low-frequency region is the largest, indicating that the diffusion resistance of Li + in the electrode at this time is the smallest. It can be concluded that an appropriate amount of MoS 2 combined with a graphite material with better conductivity can have a synergistic effect to reduce the charge transfer resistance of the composite material and improve the diffusion efficiency of Li + [ 42 ].…”

Section: Resultsmentioning

confidence: 99%

Monodisperse MoS2/Graphite Composite Anode Materials for Advanced Lithium Ion Batteries

Liu

et al. 2023

Molecules

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Traditional graphite anode material typically shows a low theoretical capacity and easy lithium decomposition. Molybdenum disulfide is one of the promising anode materials for advanced lithium-ion batteries, which possess low cost, unique two-dimensional layered structure, and high theoretical capacity. However, the low reversible capacity and the cycling-capacity retention rate induced by its poor conductivity and volume expansion during cycling blocks further application. In this paper, a collaborative control strategy of monodisperse MoS2/graphite composites was utilized and studied in detail. MoS2/graphite nanocomposites with different ratios (MoS2:graphite = 20%:80%, 40%:60%, 60%:40%, and 80%:20%) were prepared by mechanical ball-milling and low-temperature annealing. The graphite sheets were uniformly dispersed between the MoS2 sheets by the ball-milling process, which effectively reduced the agglomeration of MoS2 and simultaneously improved the electrical conductivity of the composite. It was found that the capacity of MoS2/graphite composites kept increasing along with the increasing percentage of MoS2 and possessed the highest initial discharge capacity (832.70 mAh/g) when MoS2:graphite = 80%:20%. This facile strategy is easy to implement, is low-cost, and is cosmically produced, which is suitable for the development and manufacture of advance lithium-ion batteries.

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Section: Resultsmentioning

confidence: 99%

Monodisperse MoS2/Graphite Composite Anode Materials for Advanced Lithium Ion Batteries

Liu

et al. 2023

Molecules

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“…FCNWs can be synthesized in a onestep process using plasma-enhanced chemical vapor deposition (PECVD) [7]. The pristine material, carbon nanowall (CNW), consists of vertically aligned graphene domains and has demonstrated excellent performance in various applications, including gas sensors and field-effect transistors, due to its high electron mobility, mechanical strength, and chemical stability [8][9][10]. In a previous study, the synthesis of CNW and Ag NPs in a 3D lamellar structure showed promise as a SERS substrate.…”

Section: Introductionmentioning

confidence: 99%

Surface-Enhanced Raman Spectroscopy (SERS) Investigation of a 3D Plasmonic Architecture Utilizing Ag Nanoparticles-Embedded Functionalized Carbon Nanowall

Kim,

Hong,

Choi

2023

Nanomaterials

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Surface-enhanced Raman scattering (SERS) is a highly sensitive technique for detecting DNA, proteins, and single molecules. The design of SERS substrates plays a crucial role, with the density of hotspots being a key factor in enhancing Raman spectra. In this study, we employed carbon nanowall (CNW) as the nanostructure and embedded plasmonic nanoparticles (PNPs) to increase hotspot density, resulting in robust Raman signals. To enhance the CNW’s performance, we functionalized it via oxygen plasma and embedded silver nanoparticles (Ag NPs). The authors evaluated the substrate using rhodamine 6G (R6G) as a model target molecule, ranging in concentration from 10−6 M to 10−10 M for a 4 min exposure. Our analysis confirmed a proportional increase in Raman signal intensity with an increase in concentration. The CNW’s large specific surface area and graphene domains provide dense hotspots and high charge mobility, respectively, contributing to both the electromagnetic mechanism (EM) and the chemical mechanism (CM) of SERS.

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“…However, the theoretical capacity of the carbon anode material is relatively low at 372 mAhg −1 , and the stability of nickel and tin oxide is not guaranteed. Therefore, among carbon-based nanomaterials, carbon, carbon nanotube (CNT), and hard carbon have been used as anode materials for lithium-ion batteries through many studies [5][6][7][8][9]. Carbon-based nanomaterials have stable durability and low resistance, so lithium-ion electrons move quickly [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanowalls as Anode Materials with Improved Performance Using Carbon Nanofibers

Kim,

Bon,

Kim

et al. 2023

Nanomaterials

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In this paper, a new synthesis of carbon nanofibers (CNFs)/carbon nanowalls (CNWs) was performed to improve the characteristics of anode materials of lithium-ion batteries by using the advantages offered by CNWs and CNFs. Among the carbon-based nanomaterials, CNWs provide low resistance and high specific surface area. CNFs have the advantage of being stretchable and durable. The CNWs were grown using a microwave plasma-enhanced chemical vapor deposition (PECVD) system with a mixture of methane (CH4) and hydrogen (H2) gases. Polyacrylonitrile (PAN) and N,N-Dimethyl Formamide (DMF) were stirred to prepare a solution and then nanofibers were fabricated using an electrospinning method. Heat treatment in air was then performed using a hot plate for stabilization. In addition, heat treatment was performed at 800 °C for 2 h using rapid thermal annealing (RTA) to produce CNFs. A field emission scanning electron microscope (FE-SEM) was used to confirm surface and cross-sectional images of the CNFs/CNWs anode materials. Raman spectroscopy was used to examine structural characteristics and defects. Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and constant current charge/discharge tests were performed to analyze the electrical characteristics. The synthesized CNFs/CNWs anode material had a CV value in which oxidation and reduction reactions were easily performed, and a low Rct value of 93 Ω was confirmed.

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Preparation of Carbon Nanowall and Carbon Nanotube for Anode Material of Lithium-Ion Battery

Cited by 10 publications

References 17 publications

Monodisperse MoS2/Graphite Composite Anode Materials for Advanced Lithium Ion Batteries

Monodisperse MoS2/Graphite Composite Anode Materials for Advanced Lithium Ion Batteries

Surface-Enhanced Raman Spectroscopy (SERS) Investigation of a 3D Plasmonic Architecture Utilizing Ag Nanoparticles-Embedded Functionalized Carbon Nanowall

Carbon Nanowalls as Anode Materials with Improved Performance Using Carbon Nanofibers

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