scholarly journals First-Principles Study on the Adsorption and Dissociation of Impurities on Copper Current Collector in Electrolyte for Lithium-Ion Batteries

Materials ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1256 ◽  
Author(s):  
Jian Chen ◽  
Chao Li ◽  
Jian Zhang ◽  
Cong Li ◽  
Jianlin Chen ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
First Principles ◽  
Density Functional ◽  
Physical Adsorption ◽  
Lithium Ion ◽  
Current Collector ◽  
Residual Water ◽  
Functional Theory ◽  
The Density Functional Theory ◽  
Adsorption And Dissociation

The copper current collector is an important component for lithium-ion batteries and its stability in electrolyte impacts their performance. The decomposition of LiPF6 in the electrolyte of lithium-ion batteries produces the reactive PF6, which reacts with the residual water and generates HF. In this paper, the adsorption and dissociation of H2O, HF, and PF5 on the Cu(111) surface were studied using a first-principles method based on the density functional theory. The stable configurations of HF, H2O, and PF5 adsorbed on Cu(111) and the geometric parameters of the admolecules were confirmed after structure optimization. The results showed that PF5 can promote the dissociation reaction of HF. Meanwhile, PF5 also promoted the physical adsorption of H2O on the Cu(111) surface. The CuF2 molecule was identified by determining the bond length and the bond angle of the reaction product. The energy barriers of HF dissociation on clean and O-atom-preadsorbed Cu(111) surfaces revealed that the preadsorbed O atom can promote the dissociation of HF significantly.

First principles study of the adsorption and dissociation mechanisms of H2S on a TiO2anatase (001) surface

RSC Advances ◽  
2016 ◽  
Vol 6 (10) ◽  
pp. 7941-7949 ◽  
Author(s):  
Naeem Shahzad ◽  
Akhtar Hussain ◽  
Naeem Mustafa ◽  
Nisar Ali ◽  
Mohammed Benali Kanoun ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
First Principles ◽  
Density Functional ◽  
First Principles Calculation ◽  
Functional Theory ◽  
P Adsorption ◽  
First Principles Study ◽  
The Density Functional Theory ◽  
Dissociation Mechanisms ◽  
Adsorption And Dissociation

Adsorption and dissociation mechanisms of H2S on a TiO2(001) surface were elucidated using first principles calculation based on the density functional theory.

Novel high-performance anodic materials for lithium ion batteries: Two-dimensional alloying monolayers Sn-X (X=C, Si, Ge)

2021 ◽  
Author(s):  
Pengfei Zhu ◽  
Yunxiao Zu ◽  
Yue Kuai ◽  
shuli Gao ◽  
Ge Wu ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Lithium Ion Batteries ◽  
First Principles ◽  
High Performance ◽  
Density Functional ◽  
Density Functional Theory Method ◽  
Lithium Ion ◽  
Theory Method ◽  
Two Dimensional ◽  
Functional Theory

Lithium-ion batteries (LIBs) have always been the focus of energy storage. Here, first-principles density functional theory method was used to explore the possibility of using stanene derived structure as LIBs...

Adsorption and dissociation of COCl2 on the rutile TiO2(110) surfaces: A systematic first-principles study

2021 ◽  
Author(s):  
Pan Deng ◽  
Liang Li ◽  
Dachun Liu ◽  
Xiumin Chen ◽  
Wenlong Jiang
Keyword(s):  
Density Functional Theory ◽  
First Principles ◽  
Density Functional ◽  
Functional Theory ◽  
Rutile Tio2 ◽  
First Principles Study ◽  
The Density Functional Theory ◽  
Adsorption And Dissociation

The adsorption and dissociation of phosgene (COCl2) molecule on three kinds of rutile TiO2(110) surface (Stoichiometric: TiO2-Sto; Oxygen defective: TiO2-Ov; Substoichiometric: TiO1.875) was investigated based on the density functional theory...

scholarly journals Exploring high-energy and mechanically robust anode materials based on doped graphene for lithium-ion batteries: a first-principles study

RSC Advances ◽  
2020 ◽  
Vol 10 (23) ◽  
pp. 13662-13668 ◽  
Author(s):  
Cheng Chang ◽  
Sha Yin ◽  
Jun Xu
Keyword(s):  
First Principles ◽  
Anode Materials ◽  
Density Functional ◽  
Lithium Ion ◽  
High Energy ◽  
First Principles Calculations ◽  
Functional Theory ◽  
The Density Functional Theory ◽  
Doped Graphene ◽  
Boron Nitrogen

The adsorption of Li atoms on various types of doped graphene with substituents, including boron, nitrogen, sulfur and silicon atoms, has been theoretically investigated by first-principles calculations, based on the density functional theory.

scholarly journals Electron-phonon interaction in In-induced √7 ×√3 structures on Si(111) from first-principles

2021 ◽  
Author(s):  
I. Yu. Sklyadneva ◽  
Rolf Heid ◽  
Pedro Miguel Echenique ◽  
Evgueni Chulkov
Keyword(s):  
Density Functional Theory ◽  
Double Layer ◽  
First Principles ◽  
Linear Response ◽  
Density Functional ◽  
Single Layer ◽  
Phonon Interaction ◽  
Functional Theory ◽  
Electron Phonon Interaction ◽  
The Density Functional Theory

Electron-phonon interaction in the Si(111)-supported rectangular √(7 ) ×√3 phases of In is investigated within the density-functional theory and linear-response. For both single-layer and double-layer √(7 ) ×√3 structures, it...

scholarly journals Predicting the new carbon nanocages, fullerynes: a DFT study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mohammad Qasemnazhand ◽  
Farhad Khoeini ◽  
Farah Marsusi
Keyword(s):  
Density Functional Theory ◽  
Lithium Ion Batteries ◽  
Density Functional ◽  
Lithium Ion ◽  
The Other ◽  
Electron Affinities ◽  
Chemical Formula ◽  
Functional Theory ◽  
Triple Bonds ◽  
Structural And Electronic Properties

AbstractIn this study, based on density functional theory, we propose a new branch of pseudo-fullerenes which contain triple bonds with sp hybridization. We call these new nanostructures fullerynes, according to IUPAC. We present four samples with the chemical formula of C4nHn, and the structures derived from fulleranes. We compare the structural and electronic properties of these structures with those of two common fullerenes and fulleranes systems. The calculated electron affinities of the sampled fullerynes are negative, and much smaller than those of fullerenes, so they should be chemically more stable than fullerenes. Although fulleranes also exhibit higher chemical stability than fullerynes, but pentagon or hexagon of the fullerane structures cannot pass ions and molecules. Applications of fullerynes can be included in the storage of ions and gases at the nanoscale. On the other hand, they can also be used as cathode/anode electrodes in lithium-ion batteries.

Electronic structure of the thermoelectric materials PbTe and AgPb18SbTe20 from first-principles calculations

2010 ◽  
Vol 25 (6) ◽  
pp. 1030-1036 ◽  
Author(s):  
Pengxian Lu ◽  
Zigang Shen ◽  
Xing Hu
Keyword(s):  
Band Structure ◽  
Thermoelectric Properties ◽  
First Principles ◽  
Electronic Structures ◽  
Density Functional ◽  
Partial Density ◽  
Functional Theory ◽  
The Density Functional Theory ◽  
Scanning Transmission ◽  
Linearized Augmented Plane Wave

To investigate the effects of substituting Ag and Sb for Pb on the thermoelectric properties of PbTe, the electronic structures of PbTe and AgPb18SbTe20 were calculated by using the linearized augmented plane wave based on the density-functional theory of the first principles. By comparing the differences in the band structure, the partial density of states (PDOS), the scanning transmission microscope, and the electron density difference for PbTe and AgPb18SbTe20, we explained the reason from the aspect of electronic structures why the thermoelectric properties of AgPb18SbTe20 could be improved significantly. Our results suggest that the excellent thermoelectric properties of AgPb18SbTe20 should be attributed in part to the narrowing of its band gap, band structure anisotropy, the much extrema and large DOS near Fermi energy, as well as the large effective mass of electrons. Moreover, the complex bonding behaviors for which the strong bonds and the weak bonds are coexisted, and the electrovalence and covalence of Pb–Te bond are mixed should also play an important role in the enhancement of the thermoelectric properties of the AgPb18SbTe20.

First principles analysis of oxygen vacancy formation and migration in Sr2BMoO6 (B = Mg, Co, Ni)

RSC Advances ◽  
2016 ◽  
Vol 6 (38) ◽  
pp. 31968-31975 ◽  
Author(s):  
Shuai Zhao ◽  
Liguo Gao ◽  
Chunfeng Lan ◽  
Shyam S. Pandey ◽  
Shuzi Hayase ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Oxygen Vacancy ◽  
First Principles ◽  
Density Functional ◽  
Dft Method ◽  
Double Perovskites ◽  
Functional Theory ◽  
Oxygen Vacancy Formation ◽  
The Density Functional Theory ◽  
And Migration

In this work, we present a detailed first-principles investigation on the stoichiometric and oxygen-deficient structures of double perovskites, Sr2BMoO6 (B = Mg, Co and Ni), using the density functional theory (DFT) method.

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