Vertically-oriented graphene nanowalls: Growth and application in Li-ion batteries

Yang, Qinru; Wu, Jielong; Li, Shuai; Zhang, Ling; Fu, Junchi; Huang, Feifei; Cheng, Qijin

doi:10.1016/j.diamond.2018.11.007

Cited by 33 publications

(17 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many studies on energy storage systems (ESSs) are under way for the development of renewable energy for buildings [1][2][3]. Among ESSs, the battery is the main element, and carbon is often used as the secondary electrode of the battery [4,5]. Carbon nanowalls (CNWs) are wall-shaped graphite nanomaterials with graphene sheets standing vertically in a lamellar structure and connected to one another [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Adhesion-Increased Carbon Nanowalls for the Electrodes of Energy Storage Systems

et al. 2019

View full text Add to dashboard Cite

Carbon nanowalls (CNWs), which are used as electrodes for secondary batteries in energy storage systems (ESSs), have the widest reaction surface area among the carbon-based nanomaterials, but their application is rare due to their low adhesion with substrates. Indium tin oxide (ITO), a representative transparent conducting oxide (TCO) material, is widely used as the electrode for displays, solar cells, etc. Titanium nitride (TiN) is a well-used material as an interlayer for improving the adhesion between two materials. In this study, ITO or TiN thin films were used as an interlayer to improve the adhesion between a CNW and a substrate. The interlayer was deposited on the substrate using a radio frequency (RF) magnetron sputtering system with a four-inch TiN or ITO target. CNWs were grown on the interlayer-coated substrate using a microwave-plasma-enhanced chemical vapor deposition (MPECVD) system with a mixture of methane (CH 4 ) and hydrogen (H 2 ) gases. The adhesion of the CNW/interlayer/substrate structure was observed through ultrasonic cleaning.

show abstract

Section: Introductionmentioning

confidence: 99%

Adhesion-Increased Carbon Nanowalls for the Electrodes of Energy Storage Systems

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The G peak, which is often observed in graphene, such as those found in carbon materials, was observed at 1582 cm −1, while 2D peak was observed at 2697 cm −1 as a peak affected by the π-π bond in the graphene [10]. In contrast to CNTs, it can be seen that the D peak of CNWs were measured with a particularly strong intensity, which can be attributed to the edge of graphene with vertically grown wall-shaped structures in CNW [11,12]. A strong D peak was observed in the Raman shift of CNW, but a D peak with similar intensity to that of CNT was observed in the composite material.…”

Section: Resultsmentioning

confidence: 97%

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

et al. 2021

View full text Add to dashboard Cite

Carbon nanowall (CNW) and carbon nanotube (CNT) were prepared as anode materials of lithium-ion batteries. To fabricate a lithium-ion battery, copper (Cu) foil was cleaned using an ultrasonic cleaner in a solvent such as trichloroethylene (TCE) and used as a substrate. CNW and CNT were synthesized on Cu foil using plasma-enhanced chemical vapor deposition (PECVD) and water dispersion, respectively. CNW and CNT were used as anode materials for the lithium-ion battery, while lithium hexafluorophosphate (LiPF6) was used as an electrolyte to fabricate another lithium-ion battery. For the structural analysis of CNW and CNT, field emission scanning electron microscope (FE-SEM) and Raman spectroscopy analysis were performed. The Raman analysis showed that the carbon nanotube in composite material can compensate for the defects of the carbon nanowall. Cyclic voltammetry (CV) was employed for the electrochemical properties of lithium-ion batteries, fabricated by CNW and CNT, respectively. The specific capacity of CNW and CNT were calculated as 62.4 mAh/g and 49.54 mAh/g. The composite material with CNW and CNT having a specific capacity measured at 64.94 mAh/g, delivered the optimal performance.

show abstract

“…They demonstrated that the vertical alignment with an effective electrical connection to the substrate was beneficial to minimize electrical resistance. Subsequently, Cheng et al [79] . investigated the effect of deposition time of VG on the electrochemical performance of VG anodes, and found that prolonging the deposition time of VG effectively increased the specific surface area of the graphene nanowalls, and thereby improved the performance of coin‐type lithium‐ion cells [79] …”

Section: Applications In Electrochemical Energy‐storage Systemsmentioning

confidence: 99%

Vertically Oriented Graphene Nanosheets for Electrochemical Energy Storage

Chen

2021

ChemElectroChem

View full text Add to dashboard Cite

Vertically oriented graphene (VG) nanosheets exhibit unique structural characteristics, such as large accessible surface area, rich edges, high electrical conductivity, open network channels, and agglomeration resistance, for electrochemical energy‐storage applications (e. g., supercapacitors, lithium‐ion batteries, etc.). In this Review article, we summarize recent progress in the design and engineering of VG‐based electrodes for high‐performance electrochemical energy technologies within the context of energy‐storage mechanisms and charge‐transfer kinetics, and include a perspective to highlight the challenges and promises in the exploitation of vertically oriented two‐dimensional carbon nanostructures for further enhancement of the performance of electrochemical energy‐storage devices.

show abstract

Vertically-oriented graphene nanowalls: Growth and application in Li-ion batteries

Cited by 33 publications

References 44 publications

Adhesion-Increased Carbon Nanowalls for the Electrodes of Energy Storage Systems

Adhesion-Increased Carbon Nanowalls for the Electrodes of Energy Storage Systems

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

Vertically Oriented Graphene Nanosheets for Electrochemical Energy Storage

Contact Info

Product

Resources

About