Electronic and Structural Changes in Ni0.5TiOPO4 Li-Ion Battery Cells Upon First Lithiation and Delithiation, Studied by High-Energy X-ray Spectroscopies

2015 ◽  
Vol 119 (18) ◽  
pp. 9692-9704 ◽  
Author(s):  
Rickard Eriksson ◽  
Karima Lasri ◽  
Mihaela Gorgoi ◽  
Torbjörn Gustafsson ◽  
Kristina Edström ◽  
...  
Keyword(s):  
Structural Changes ◽  
High Energy ◽  
Li Ion Battery ◽  
X Ray ◽  
Li Ion ◽  
Battery Cells

In situ high-energy synchrotron X-ray diffraction studies and first principles modeling of α-MnO2 electrodes in Li–O2 and Li-ion coin cells

2015 ◽  
Vol 3 (14) ◽  
pp. 7389-7398 ◽  
Author(s):  
Zhenzhen Yang ◽  
Lynn Trahey ◽  
Yang Ren ◽  
Maria K. Y. Chan ◽  
Chikai Lin ◽  
...  
Keyword(s):  
First Principles ◽  
Structural Changes ◽  
High Energy ◽  
X Ray Diffraction ◽  
Synchrotron Diffraction ◽  
X Ray ◽  
Li Ion ◽  
Battery Cells

In situ synchrotron diffraction and first principles modeling shows structural changes in α-MnO2 during cycling in Li–O2 battery cells, as lithium and oxygen are incorporated into and removed from tunnels in the structure.

A Ventilation Cooling Solution to Improve Thermal Environment of High Energy Density Li-Ion Battery Packs

2015 ◽  
Author(s):  
Zhiqiang Li ◽  
Xiaowei Fan ◽  
Fang Wang ◽  
Dasi He ◽  
Shifei Wei
Keyword(s):  
Energy Density ◽  
Thermal Environment ◽  
High Energy ◽  
High Energy Density ◽  
Temperature Fields ◽  
Maximum Temperature ◽  
Li Ion Battery ◽  
Battery System ◽  
Li Ion ◽  
Battery Cells

This paper focuses on the cooling solution to a high energy density and large capacity Li-ion battery system which consist of four packs of 26650 cells. The cooling measure is a critical technology for many Li-ion battery systems especially that designed for hybrid electric vehicles, in which, high energy density within a limited space is very common in these systems. Both the safety and efficiency of Li-ion battery cells rely on the temperature which is under control of the battery thermal management system. In this study, temperature fields within battery boxes are simulated with the computational fluid dynamic (CFD) method. With the help of an airconditioner, a cooling solution is proposed for a relatively large dimensional, high energy density Li-ion battery cells array using by vehicles. Through the proposed solution, the maximum single-cell temperature is restricted to a reasonable level, and the maximum temperature difference throughout the battery system is also improved.

Structural changes in titanium dioxide nanocrystals during plastic deformation

2005 ◽  
Vol 38 (5) ◽  
pp. 749-756 ◽  
Author(s):  
Ulrich Gesenhues
Keyword(s):  
Structural Changes ◽  
Crystal Size ◽  
Lower Layer ◽  
High Energy ◽  
Primary Crystal ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Hall Method ◽  
Means Of Transmission

The polygonization of 200 nm rutile crystals during dry ball-milling at 10gwas monitored in detail by means of transmission electron microscopy (TEM) and X-ray diffraction (XRD). The TEM results showed how to modify the Williamson–Hall method for a successful evaluation of crystal size and microstrain from XRD profiles. Macrostrain development was determined from the minute shift of the most intense reflection. In addition, changes in pycnometrical density were monitored. Accordingly, the primary crystal is disintegrated during milling into a mosaic of 12–35 nm pieces where the grain boundaries induce up to 1.2% microstrain in a lower layer of 6 nm thickness. Macrostrain in the interior of the crystals rises to 0.03%. The pycnometrical density, reflecting the packing density of atoms in the grain boundary, decreases steadily by 1.1%. The results bear relevance to our understanding of plastic flow and the mechanism of phase transitions of metal oxides during high-energy milling.

scholarly journals Structural Evolution in Wet Mechanically Alloyed Co-Fe-(Ta,W)-B Alloys

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 800
Author(s):  
Vladimír Girman ◽  
Maksym Lisnichuk ◽  
Daria Yudina ◽  
Miloš Matvija ◽  
Pavol Sovák ◽  
...  
Keyword(s):  
Structural Changes ◽  
Magnetic Measurements ◽  
Structural Evolution ◽  
High Energy ◽  
Control Agent ◽  
X Ray Diffraction ◽  
Mechanically Alloyed ◽  
X Ray ◽  
Transmission Electron ◽  
X Ray Absorption

In the present study, the effect of wet mechanical alloying (MA) on the glass-forming ability (GFA) of Co43Fe20X5.5B31.5 (X = Ta, W) alloys was studied. The structural evolution during MA was investigated using high-energy X-ray diffraction, X-ray absorption spectroscopy, high-resolution transmission electron microscopy and magnetic measurements. Pair distribution function and extended X-ray absorption fine structure spectroscopy were used to characterize local atomic structure at various stages of MA. Besides structural changes, the magnetic properties of both compositions were investigated employing a vibrating sample magnetometer and thermomagnetic measurements. It was shown that using hexane as a process control agent during wet MA resulted in the formation of fully amorphous Co-Fe-Ta-B powder material at a shorter milling time (100 h) as compared to dry MA. It has also been shown that substituting Ta with W effectively suppresses GFA. After 100 h of MA of Co-Fe-W-B mixture, a nanocomposite material consisting of amorphous and nanocrystalline bcc-W phase was synthesized.

Using In Situ High-Energy X-ray Diffraction to Quantify Electrode Behavior of Li-Ion Batteries from Extreme Fast Charging

2021 ◽  
Author(s):  
Partha P. Paul ◽  
Chuntian Cao ◽  
Vivek Thampy ◽  
Hans-Georg Steinrück ◽  
Tanvir R. Tanim ◽  
...  
Keyword(s):  
High Energy ◽  
Li Ion Batteries ◽  
X Ray Diffraction ◽  
X Ray ◽  
Fast Charging ◽  
Li Ion

Investigation of the Reasons for Capacity Fading in Li-Ion Battery Cells

2014 ◽  
Vol 161 (10) ◽  
pp. A1672-A1680 ◽  
Author(s):  
Baruch Ziv ◽  
Valentina Borgel ◽  
Doron Aurbach ◽  
Jung-Hyun Kim ◽  
Xingcheng Xiao ◽  
...  
Keyword(s):  
Li Ion Battery ◽  
Capacity Fading ◽  
Li Ion ◽  
Battery Cells

High-energy, rechargeable Li-ion battery based on carbon nanotube technology

2004 ◽  
Vol 138 (1-2) ◽  
pp. 277-280 ◽  
Author(s):  
R.Scott Morris ◽  
Brian G. Dixon ◽  
Thomas Gennett ◽  
Ryne Raffaelle ◽  
Michael J. Heben
Keyword(s):  
Carbon Nanotube ◽  
High Energy ◽  
Li Ion Battery ◽  
Li Ion ◽  
Carbon Nanotube Technology

Amount of Free Liquid Electrolyte in Commercial Large Format Prismatic Li-Ion Battery Cells

2019 ◽  
Vol 166 (4) ◽  
pp. A779-A786 ◽  
Author(s):  
Natalia P. Lebedeva ◽  
Franco Di Persio ◽  
Theodora Kosmidou ◽  
Denis Dams ◽  
Andreas Pfrang ◽  
...  
Keyword(s):  
Liquid Electrolyte ◽  
Li Ion Battery ◽  
Large Format ◽  
Li Ion ◽  
Battery Cells
Sign in / Sign up

Export Citation Format

Share Document