PVDF-HFP/LiF Composite Interfacial Film to Enhance the Stability of Li-Metal Anodes

2020 ◽  
Vol 3 (7) ◽  
pp. 7191-7199
Author(s):  
Suogang Guo ◽  
Nan Piao ◽  
Li Wang ◽  
Hong Xu ◽  
Guangyu Tian ◽  
...  
Keyword(s):  
Interfacial Film ◽  
The Stability ◽  
Metal Anodes

scholarly journals Effect of Surfactant Molecular Structure on Emulsion Stability Investigated by Interfacial Dilatational Rheology

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1127
Author(s):  
Yuejie Jin ◽  
Dingrong Liu ◽  
Jinhua Hu
Keyword(s):  
Emulsion Stability ◽  
Chain Structure ◽  
Interfacial Film ◽  
Future Design ◽  
Rheological Method ◽  
Viscoelastic Modulus ◽  
Hydrophobic Chain ◽  
Branched Chain ◽  
The Stability ◽  
Branched Structure

Polyglycerol polyricinolate (PGPR) and polyglycerol-2 dioleate were selected as model surfactants to construct water-in-oil (W/O) emulsions, and the effect of interfacial rheological properties of surfactant film on the stability of emulsions were investigated based on the interfacial dilatational rheological method. The hydrophobicity chain of PGPR is polyricinic acid condensed from ricinic acid, and that of polyglycerol-2 dioleate is oleic acid. Their dynamic interfacial tensions in 15 cycles of interfacial compression-expansion were determined. The interfacial dilatational viscoelasticity was analyzed by amplitude scanning in the range of 1–28% amplitude and frequency sweep in the range of 5–45 mHz under 2% amplitude. It was found that PGPR could quickly reach adsorption equilibrium and form interfacial film with higher interfacial dilatational viscoelastic modulus to resist the deformation of interfacial film caused by emulsion coalescence, due to its branched chain structure and longer hydrophobic chain, and the emulsion thus presented good stability. However, polyglycerol-2 dioleate with a straight chain structure had lower interfacial tension, and it failed to resist the interfacial disturbance caused by coalescence because of its lower interfacial dilatational viscoelastic modulus, and thus the emulsion was unstable. This study reveals profound understanding of the influence of branched structure of PGPR hydrophobic chain on the interfacial film properties and the emulsion stability, providing experimental reference and theoretical guidance for future design or improvement of surfactant.

Novel LixSiSy/Nafion as an artificial SEI film to enable dendrite-free Li metal anodes and high stability Li–S batteries

2020 ◽  
Vol 8 (18) ◽  
pp. 8979-8988 ◽  
Author(s):  
Qi Jin ◽  
Xitian Zhang ◽  
Hong Gao ◽  
Lu Li ◽  
Zhiguo Zhang
Keyword(s):  
High Stability ◽  
Composite Layer ◽  
Metal Anode ◽  
Sei Film ◽  
Li Metal Anode ◽  
The Stability ◽  
Metal Anodes

We propose an approach for Li metal anode protection by in situ growth of a LixSiSy/Nafion composite layer on the surface of the Li metal as an artificial SEI film to significantly enhance the stability of the Li metal anode.

scholarly journals An Electrochemically Activated Nanofilm for Sustainable Mg Anode with Fast Charge Transfer Kinetics

2021 ◽  
Author(s):  
Hui Wang ◽  
Jaegeon Ryu ◽  
Scott A McClary ◽  
Daniel M Long ◽  
Mingxia Zhou ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Surface Film ◽  
Electrochemical Techniques ◽  
Film Resistance ◽  
Extended Time ◽  
Interfacial Stability ◽  
Interfacial Film ◽  
Fast Charge ◽  
The Stability

Abstract Highly reversible Mg plating/stripping is key for rechargeable Mg batteries and has typically been successfully demonstrated using transient electrochemical techniques such as cyclic voltammetry measurements. However, little effort has been invested in studying the stability of the electrode/electrolyte interface over an extended time. We report here the development an in situ generated surface film for Mg anodes based on electrodeposited bismuth (E_Bi). This film improves the interfacial stability of Mg in contact with the electrolyte, particularly over an extended time, and possesses fast charge-transfer kinetics (< 30 Ω∙cm2) and low non-time-sensitive interfacial film resistance (ca. 5 Ω∙cm2) for active Mg species.

Effect of the Anion Activity on the Stability of Li Metal Anodes in Lithium-Sulfur Batteries

2016 ◽  
Vol 26 (18) ◽  
pp. 3059-3066 ◽  
Author(s):  
Ruiguo Cao ◽  
Junzheng Chen ◽  
Kee Sung Han ◽  
Wu Xu ◽  
Donghai Mei ◽  
...  
Keyword(s):  
Lithium Sulfur Batteries ◽  
The Stability ◽  
Lithium Sulfur ◽  
Metal Anodes

Effect of the defect densities of reduced graphene oxide network on the stability of lithium-metal anodes

2021 ◽  
Vol 27 ◽  
pp. 102276
Author(s):  
Huan Zhang ◽  
Meiling Huang ◽  
Jie Song ◽  
Daming Sun ◽  
Yingjun Qiao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Lithium Metal ◽  
Reduced Graphene ◽  
Lithium Metal Anodes ◽  
The Stability ◽  
Defect Densities ◽  
Metal Anodes

Investigation into the stability of Li metal anodes in Li–O2batteries with a redox mediator

2017 ◽  
Vol 5 (21) ◽  
pp. 10609-10621 ◽  
Author(s):  
Seongmin Ha ◽  
Youngjin Kim ◽  
Dongho Koo ◽  
Kwang-Ho Ha ◽  
Yuwon Park ◽  
...  
Keyword(s):  
Failure Mechanism ◽  
Redox Mediator ◽  
The Stability ◽  
Metal Anodes

We clarified the failure mechanism of Li–O2batteries with a redox mediator.

Synthesis and characterization of a hierarchically structured three-dimensional conducting scaffold for highly stable Li metal anodes

2019 ◽  
Vol 7 (20) ◽  
pp. 12882-12892 ◽  
Author(s):  
Ji Young Kim ◽  
Guicheng Liu ◽  
Minh Xuan Tran ◽  
Ryanda Enggar Anugrah Ardhi ◽  
Hansung Kim ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Synthesis And Characterization ◽  
The Stability ◽  
Metal Anodes

This unique hierarchically structured 3D conducting scaffold could significantly improve the stability of Li metal anodes.

Open discussion

1982 ◽  
Vol 99 ◽  
pp. 605-613
Author(s):  
P. S. Conti
Keyword(s):  
Buenos Aires ◽  
Large Mass ◽  
List Type ◽  
Common Phenomenon ◽  
Open Discussion ◽  
The Stability ◽  
Ring Nebulae

Conti: One of the main conclusions of the Wolf-Rayet symposium in Buenos Aires was that Wolf-Rayet stars are evolutionary products of massive objects. Some questions:–Do hot helium-rich stars, that are not Wolf-Rayet stars, exist?–What about the stability of helium rich stars of large mass? We know a helium rich star of ∼40 MO. Has the stability something to do with the wind?–Ring nebulae and bubbles : this seems to be a much more common phenomenon than we thought of some years age.–What is the origin of the subtypes? This is important to find a possible matching of scenarios to subtypes.

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