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.

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 Failure Mechanism and Mitigation Measures of the G1002 Electricity Pylon Landslide at the Jinping I Hydropower Station

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Gang Luo ◽  
Yutian Zhong ◽  
Yuanxiang Yang
Keyword(s):  
Failure Mechanism ◽  
Power Transmission ◽  
Heavy Precipitation ◽  
Mitigation Strategies ◽  
Mitigation Measures ◽  
Hydropower Station ◽  
Residual Soil ◽  
Valley Slope ◽  
Jinping I Hydropower Station ◽  
The Stability

On August 29 and 30, 2012, local extreme rainfalls struck the construction area of the Jinping I Hydropower Station, Xichang, China, and triggered many geohazards. The upper region of the left valley slope 200 m downstream of the dam failed and slid, exposing the D-pile of the G1002 electricity pylon and threatening the entire power transmission line. Therefore, guaranteeing the stability of the residual soil masses in the rear area of the main scarp and the safety of the G1002 electricity pylon became a primary emergency task. Geological field surveys, topographical mapping, study of the failure mechanisms, and stability evaluations were carried out from October 12, 2012, to November 7, 2013. It is revealed that the failure mechanism of the G1002 electricity pylon landslide is flood-induced tractive sliding along the interlayer between the colluvium and the bedrock, significantly influenced by heavy precipitation and frequent blasting activities during the dam construction. The residual soil masses around the G1002 electricity pylon foundation are unstable under rainfall conditions. In order to ensure the stability of the residual soil masses and pylon foundation, a mitigation measure of the anchor cables combined with lattice frame beams was proposed and applied in practice. This paper provides insights into the problems associated with the selection of the locations of electricity pylons in ravine regions as well as mitigation strategies for similar landslides.

A new thin layer cell for battery related DEMS-experiments: the activity of redox mediators in the Li–O2 cell

2018 ◽  
Vol 20 (33) ◽  
pp. 21447-21456 ◽  
Author(s):  
P. P. Bawol ◽  
P. Reinsberg ◽  
C. J. Bondue ◽  
A. A. Abd-El-Latif ◽  
P. Königshoven ◽  
...  
Keyword(s):  
Thin Layer ◽  
Underlying Mechanism ◽  
Redox Mediator ◽  
Redox Mediators ◽  
Layer Cell ◽  
Thin Layer Cell ◽  
The Stability

The activity of four different redox mediators was investigated with DEMS. The paper provides information about the underlying mechanism of Li2O2 oxidation by a redox mediator as well as about the stability of the redox mediator.

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 Influence of Both Soil Properties and Geometric Parameters on Failure Mechanisms and Stability of Two-Layer Undrained Slopes

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Shuangfeng Guo ◽  
Ning Li ◽  
Wenpeng Liu ◽  
Zongyuan Ma ◽  
Naifei Liu ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Failure Mechanism ◽  
Failure Mechanisms ◽  
Slope Angle ◽  
Strength Parameter ◽  
Strength Ratio ◽  
Stability Number ◽  
Parametric Studies ◽  
The Stability ◽  
Clay Slopes

The stability of the two-layer undrained clay slopes should be given considerable attention since they are commonly observed in nature and in manmade structures, and they traditionally have low stability. Therefore, with the elastoplastic finite element method, this paper thoroughly explores the influence of the soil strength parameter cu, slope angle β, and slope depth ratio DH on the slope stability and failure mechanisms by the wide-ranging parametric changes. The aims of this study are also to find the critical strength ratio (cu2/cu1)crit and the maximum values of the stability number Nc that were observed in the parametric studies. Numerical results are displayed in the form of charts to give Nc and (cu2/cu1)crit as a function of cu, β, and DH. Moreover, influences of DH and β on Nc and failure mechanisms are examined in this study. The results of numerical analysis demonstrate that cu2/cu1 significantly affects both the critical failure mechanism and the stability of the two-layer undrained slope. Improved knowledge of the location of the critical failure mechanism allows for accurately estimating the stability of the two-layer undrained slopes for future strengthening measurements to preserve stability.

scholarly journals Failure Mechanism and Factor of Safety for Spatially Variable Undrained Soil Slope

2019 ◽  
Vol 2019 ◽  
pp. 1-17 ◽  
Author(s):  
Liang Li ◽  
Xuesong Chu
Keyword(s):  
Random Field ◽  
Failure Mechanism ◽  
Factor Of Safety ◽  
Limit Equilibrium ◽  
Vertical Direction ◽  
Failure Surface ◽  
Cohesive Soil ◽  
Soil Slope ◽  
The Stability ◽  
Undrained Soil

This paper aims to investigate the differences in factor of safety (FS) and failure mechanism (FM) for spatially variable undrained soil slope between using finite element method (FEM) , finite difference method (FDM), and limit equilibrium method (LEM). The undrained shear strength of cohesive soil slope is modeled by a one-dimensional random field in the vertical direction. The FS and FM for a specific realization of random field are determined by SRT embedded in FEM- and FDM-based software (e.g., Phase2 6.0 and FLAC) and LEM, respectively. The comparative study has demonstrated that the bishop method (with circular failure surface) exhibits performance as fairly good as that of SRT both in FS and FM for the undrained slope cases where no preferable controlling surfaces such as hydraulic tension crack and inclined weak seams dominate the failure mechanism. It is, however, worthwhile to point out that unconservative FM is provided by the Bishop method from the aspect of failure consequence (i.e., the failure consequence indicated by the FM from the Bishop method is smaller than that from SRT). The rigorous LEM (e.g., M-P and Spencer method with noncircular failure surface) is not recommended in the stability analysis of spatially variable soil slopes before the local minima and failure to converge issues are fully addressed. The SRT in combination with FEM and/or FDM provides a rigorous and powerful tool and is highly preferable for slope reliability of spatially variable undrained slope.

scholarly journals Upper-Bound Finite Element Adaptive Analysis of Plane Strain Heading in Soil with a Soft Upper Layer and Hard Lower Layer

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Jian Zhang ◽  
Li Ding ◽  
Yu Liang ◽  
Jingyao Zong ◽  
Zhenya Li
Keyword(s):  
Finite Element ◽  
Failure Mechanism ◽  
Upper Bound ◽  
Lower Layer ◽  
Adaptive Strategy ◽  
Tunnel Face ◽  
Slip Lines ◽  
The Stability ◽  
Tunnel Depth ◽  
Soil Interface

This paper investigates the stability of a rectangular tunnel face affected by surcharge loading in soil with a soft upper layer and hard lower layer using upper-bound finite element methods with a plastic-dissipation-based mesh adaptive strategy (UBFEM-PDMA). Seven different positions for the soil interface are selected to study this problem. The upper bounds on the ultimate surcharge loads σs are presented in terms of dimensionless stability charts. The σs increases with tunnel depth, and it increases when the position of the soil interface moves up along the tunnel face. The failure mechanism primarily involves a wedge-shaped zone around the tunnel face and two slip lines originating from the top and bottom of the tunnel face, and it is mainly influenced by three factors, i.e., the position of the soil interface, the soil properties, and the tunnel depth. In contrast to the failure mechanism for uniform soil, multiple slip lines exist in the tunnel face in soil with a soft upper layer and hard lower layer. The results compare reasonably well with those in the literature and those from the numerical method.

The SRAM Soft Failure Analysis with SNM & TR Characterization by Nanoprobing in Sub 45nm

2009 ◽  
Author(s):  
Jakyung Hong ◽  
S.J. Cho ◽  
Y.W. Han ◽  
H.S. Choi ◽  
T.E. Kim ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Failure Mechanism ◽  
Metal Layer ◽  
Noise Margin ◽  
Soft Failure ◽  
Sram Cell ◽  
Cell Stability ◽  
The Stability ◽  
Static Noise

Abstract This paper presents the process of measuring static noise margin (SNM), write noise margin (WNM) with 6 pin nanoprober, and characterization and analysis of SRAM cell stability through case studies of 45nm devices SRAM soft failures. It highlights that the local mismatch in the bit cell caused by slight variations in the transistor characteristics, such as Vth shift and Idsat, off variation, also can easily induce a soft failure. The analysis of the SNM TR characteristic is successfully demonstrated through the case study of 45nm SRAM devices. The chapter explains SNM measurement in the metal layer and transistor measurements in the CA layer. Measuring the SNM TR's characteristics is an important methodology in understanding the stability of each bit cell and failure mechanism depending on voltage, defects, and other factors. The next generation of nanoprobing analysis can be expanded.

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