scholarly journals On certain applications of gradient nanochemomechanics: deformation and fracture of LIB and SGS

2019 ◽  
Vol 28 (1) ◽  
pp. 74-80
Author(s):  
Ioannis Tsagrakis ◽  
Iason Konstantopoulos ◽  
Alexandros Sidiropoulos ◽  
Elias C. Aifantis
Keyword(s):  
Spatial Gradient ◽  
Li Ion Battery ◽  
Energy Materials ◽  
Deformation And Fracture ◽  
Special Cases ◽  
New Energy ◽  
Extended Surface ◽  
Li Ion ◽  
High Degree ◽  
And Diffusion

AbstractThe term gradient nano-chemo-mechanics was introduced to encompass models incorporating higher order couplings between deformation and chemistry at the nanoscale. Along these lines, the article first reviews the basics of a robust theoretical framework developed for such processes focusing on elasticity and diffusion. The classical laws for Hookean deformation and Fickean transport are modified to include extra Laplacian terms and corresponding internal lengths modeling nonlocal interactions. Then, special cases are considered to describe deformation and fracture aspects of new energy materials; namely Li-ion battery (LIB) nanostructured anodes and disclinated metallic microcrystals (DMC). Both of these material systems are characterized by a high degree of spatial gradient structures (SGS) with extended surface for energy storage and catalysis applications.

Strain-Enhanced Li Storage and Diffusion on the Graphyne as the Anode Material in the Li-Ion Battery

2018 ◽  
Vol 122 (40) ◽  
pp. 22838-22848 ◽  
Author(s):  
Qiuyue Zhang ◽  
Chunmei Tang ◽  
Weihua Zhu ◽  
Chun Cheng
Keyword(s):  
Anode Material ◽  
Li Ion Battery ◽  
Li Ion ◽  
And Diffusion ◽  
Li Storage

The Study of Current and Voltage Needle for Li-Ion Battery Formation

2013 ◽  
Vol 650 ◽  
pp. 403-406
Author(s):  
Liang Han ◽  
Feng Xiao ◽  
Shen Wang Wang
Keyword(s):  
Detailed Analysis ◽  
Hot Spot ◽  
Economic Benefits ◽  
Energy Technology ◽  
Li Ion Battery ◽  
Special Equipment ◽  
Mechanical Structure ◽  
New Energy ◽  
Li Ion

In recent years, the environmental and rechargeable Li-ion battery has become a hot spot in new energy technology field. The performance of Li-ion battery is in a large part affected by the advanced special equipment. The current and voltage needle is an important part in the special equipment. Based on the existing current and voltage needle, the paper designs a new current and voltage needle which is used for Li-ion battery formation. In this paper, we make a detailed analysis of mechanical structure and point out the superiority compared with the existing current and voltage needle. Cooperating with other formation equipment, it has achieved good economic benefits for the enterprise.

Oxidized PAN nanofibrous membrane as a separator for Li-ion battery

2014 ◽  
Author(s):  
J.H. Lee ◽  
M.H. Kim ◽  
S.H. Lee ◽  
S.Y. Jin ◽  
W.H. Park
Keyword(s):  
Nanofibrous Membrane ◽  
Li Ion Battery ◽  
Li Ion

Anionic and Cationic Redox Processes in β-Li2IrO3 and Their Structural Implications on Electrochemical Cycling in Li-Ion Cell

2019 ◽  
Author(s):  
Paul Pearce ◽  
Gaurav Assat ◽  
Antonella Iadecola ◽  
François Fauth ◽  
Rémi Dedryvère ◽  
...  
Keyword(s):  
Analytical Techniques ◽  
Charge Compensation ◽  
Coupling Mechanism ◽  
Redox Processes ◽  
Positive Electrodes ◽  
X Ray ◽  
Electrochemical Cycling ◽  
Li Ion ◽  
Electrochemical Instability ◽  
High Degree

The recent discovery of anionic redox as a means to increase the energy density of transition metal oxide positive electrodes is now a well established approach in the Li-ion battery field. However, the science behind this new phenomenon pertaining to various Li-rich materials is still debated. Thus, it is of paramount importance to develop a robust set of analytical techniques to address this issue. Herein, we use a suite of synchrotron-based X-ray spectroscopies as well as diffraction techniques to thoroughly characterize the different redox processes taking place in a model Li-rich compound, the tridimentional hyperhoneycomb β-Li2IrO3. We clearly establish that the reversible removal of Li+ from this compound is associated to a previously described reductive coupling mechanism and the formation of the M-(O-O) and M-(O-O)* states. We further show that the respective contributions to these states determine the spectroscopic response for both Ir L3-edge X-ray absorption spectroscopy (XAS) and X-ray photoemissions spectroscopy (XPS). Although the high covalency and the robust tridimentional structure of this compound enable a high degree of reversibile delithiation, we found that pushing the limits of this charge compensation mechanism has significant effects on the local as well as average structure, leading to electrochemical instability over cycling and voltage decay. Overall, this work highlights the practical limits to which anionic redox can be exploited and sheds some light on the nature of the oxidized species formed in certain lithium-rich compounds.<br>

Anionic and Cationic Redox Processes in β-Li2IrO3 and Their Structural Implications on Electrochemical Cycling in Li-Ion Cell

2019 ◽  
Author(s):  
Paul Pearce ◽  
Gaurav Assat ◽  
Antonella Iadecola ◽  
François Fauth ◽  
Rémi Dedryvère ◽  
...  
Keyword(s):  
Analytical Techniques ◽  
Charge Compensation ◽  
Coupling Mechanism ◽  
Redox Processes ◽  
Positive Electrodes ◽  
X Ray ◽  
Electrochemical Cycling ◽  
Li Ion ◽  
Electrochemical Instability ◽  
High Degree

The recent discovery of anionic redox as a means to increase the energy density of transition metal oxide positive electrodes is now a well established approach in the Li-ion battery field. However, the science behind this new phenomenon pertaining to various Li-rich materials is still debated. Thus, it is of paramount importance to develop a robust set of analytical techniques to address this issue. Herein, we use a suite of synchrotron-based X-ray spectroscopies as well as diffraction techniques to thoroughly characterize the different redox processes taking place in a model Li-rich compound, the tridimentional hyperhoneycomb β-Li2IrO3. We clearly establish that the reversible removal of Li+ from this compound is associated to a previously described reductive coupling mechanism and the formation of the M-(O-O) and M-(O-O)* states. We further show that the respective contributions to these states determine the spectroscopic response for both Ir L3-edge X-ray absorption spectroscopy (XAS) and X-ray photoemissions spectroscopy (XPS). Although the high covalency and the robust tridimentional structure of this compound enable a high degree of reversibile delithiation, we found that pushing the limits of this charge compensation mechanism has significant effects on the local as well as average structure, leading to electrochemical instability over cycling and voltage decay. Overall, this work highlights the practical limits to which anionic redox can be exploited and sheds some light on the nature of the oxidized species formed in certain lithium-rich compounds.<br>

A NOVEL CLOSED LOOP PROCESS FOR RECYCLING SPENT Li-ION BATTERY CATHODE MATERIALS

2021 ◽  
pp. 1-16
Author(s):  
Joey Chung-Yen Jung ◽  
Norman Chow ◽  
Anca Nacu ◽  
Mariam Melashvili ◽  
Alex Cao ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Closed Loop ◽  
Li Ion Battery ◽  
Li Ion
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