Preparation of hybrid ceramic/PVC composites showing both high dielectric constant and breakdown strength ascribed to interfacial effect between V2C MXene and Cu2O

Feng, Yefeng; Qiu, Hongrong; Mao, Bingshuang; Bo, Maolin; Deng, Qihuang

doi:10.1016/j.colsurfa.2021.127650

Cited by 14 publications

(3 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, we used first-principles calculations to investigate the dielectric response of PPy/V 2 C Mxene-ZnO. For our calculations, we used the density functional theory (DFT) method, which is a widely used and well-established first-principles calculation method [40][41][42][43][44][45][46][47][48]. DFT is based on the idea that through the self-consistent solution of the Kohn-Sham equations, the total energy of a system may be represented as a function of the electron density.…”

Section: Methodsmentioning

confidence: 99%

Quantum Mechanical Study of the Dielectric Response of V2C-ZnO/PPy Ternary Nanocomposite for Energy Storage Application

Ezika

Sadiku

Adekoya

et al. 2023

J Inorg Organomet Polym

View full text Add to dashboard Cite

With the proliferation of electronic gadgets and the internet of things comes a great need for lightweight, affordable, sustainable, and long-lasting power devices to combat the depletion of fossil fuel energy and the pollution produced by chemical energy storage. The use of high-energy-density polymer/ceramic composites is generating more curiosity for future technologies, and they require a high dielectric constant and breakdown strength. Electric percolation and Interface polarization are responsible for the high dielectric constant. To create composite dielectrics, high-conductivity ceramic particles are combined with polymers to improve the dielectric constant. In this work, ternary nanocomposites with better dielectric characteristics are created using a nanohybrid filler of V2C Mxene-ZnO in a polypyrrole (PPy) matrix. Then, the bonding and the uneven charge distribution in the ceramic/ceramic contact area are investigated using quantum mechanical calculations. This non-uniform distribution of charges is intended to improve the ceramic/ceramic interface’s dipole polarization (dielectric response). The interfacial chemical bond formation can also improve the hybrid filler’s stability in terms of structure and, consequently, of the composite films. To comprehend the electron-transfer process, the density of state and electron localization function of the ceramic hybrid fillers are also studied. The polymer nanocomposite is suggested to provide a suitable dielectric response for energy storage applications.

show abstract

Section: Methodsmentioning

confidence: 99%

Quantum Mechanical Study of the Dielectric Response of V2C-ZnO/PPy Ternary Nanocomposite for Energy Storage Application

Ezika

Sadiku

Adekoya

et al. 2023

J Inorg Organomet Polym

View full text Add to dashboard Cite

show abstract

“…The density functional theory (DFT) method, which is based on the Kohn-Sham equation, is used. From the equation, the electron density function can be represented by the total energy of the system [20][21][22][23][24][25][26][27][28]. To define the electron-electron exchange within the composite, the exchange-correlation functionals were used in our calculations and were modelled using Perdew-Burke-Ernzerhof (PBE) and generalized gradient approximation (GGA).…”

Section: Methodsmentioning

confidence: 99%

Investigation of the Dielectric Response of PPy/V2C MXene–ZnO Using Quantum Mechanical Calculations

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The presence of Ag signals locate at 368.62 eV and 374.63 eV in the Ag 3d pattern indicates that the formation of Cu NPs does not diminish the presence of Ag NPs. The appearance of signals of Cu from the plot of Cu 2p with peaks locating at 932.73 eV and 952.49 eV [46], indicating that Cu NPs successfully enter into the structure of V 2 CT x . The presence of Cu as a metal monomer in M-IV is a mechanism similar to the reduction of Ag in the presence of the obtained V 2 CT x precursors.…”

Section: Microstructurementioning

confidence: 99%

Facile self-assembly of sandwich-like MXene layered multiscale structure nanocomposite

zhou

Zhang²,

Zhou³

et al. 2022

2D Mater.

View full text Add to dashboard Cite

V2CTx shows a low ion diffusion barrier, while the multiple oxidation states of vanadium allow V2CTx to participate in multi-electron redox reactions, which demonstrates a greater potential for electrochemical energy storage applications. However, the lateral arrangement of V2CTx lamellae tends to cause the accumulation and collapse of the structure. Herein, the two-dimensional layered V2CTx is modified with Ag+ and Cu2+, the V2CTx/Ag/Cu composite is successfully prepared. The Ag NPs and Cu NPs grown between the layers of V2CTx can effectively suppress the accumulation of the lamellae and ensure the smooth transfer of electrolyte ions and electrons between the layers. Meanwhile, the doping of Ag NPs and Cu NPs can enlarge the interlayer spacing of V2CTx, which can expose more active contact sites for electrolyte ions, shorten the diffusion path of electrolyte ions, and effectively improve the electrochemical performance of V2CTx. The Ag NPs and Cu NPs agglomerate in the delamination of V2CTx to form a conductive channel covering multiple layers, which facilitates cross-layer electron transfer and reduces the internal resistance of the V2CTx/Ag/Cu composite. Basis on the above reasonable structural designs, the internal resistance of the V2CTx/Ag/Cu composite is only 0.72 Ω, showing excellent diffusion ability of K+. The result represents a new step forward in exploring the electrochemical properties of two dimensional materials of V2CTx.

show abstract

Preparation of hybrid ceramic/PVC composites showing both high dielectric constant and breakdown strength ascribed to interfacial effect between V2C MXene and Cu2O

Cited by 14 publications

References 48 publications

Quantum Mechanical Study of the Dielectric Response of V2C-ZnO/PPy Ternary Nanocomposite for Energy Storage Application

Quantum Mechanical Study of the Dielectric Response of V2C-ZnO/PPy Ternary Nanocomposite for Energy Storage Application

Investigation of the Dielectric Response of PPy/V2C MXene–ZnO Using Quantum Mechanical Calculations

Facile self-assembly of sandwich-like MXene layered multiscale structure nanocomposite

Contact Info

Product

Resources

About