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lithium-ion battery

Siva P V Nadimpalli's picture

Effect of Stress on the Chemical Diffusion Coefficient of Li in High-Energy-Density Electrodes

In Situ Measurement of the Effect of Stress on the Chemical Diffusion Coefficient of Li in High-Energy-Density Electrodes 

Rajasekhar Tripuraneni, Subhajit Rakshit, and Siva Nadimpalli

looking for postdoc position in energe storage field

I'm looking for postdoc or engineering position in energy storage or power source area (development of supercapacitors, lithium-ion batteries, etc.), where I could apply my knowledge as well as many-years hands-on experience in electrochemistry, materials science and chemical engineering. d.gromadskyi@gmail.com

Master position in R&D department of Robert Bosch

 

 Hello all,

 

Thank you for your application, the position is taken!

 

Regards and all the best for the new year,

H-Y Amanieu

 

Hello all,

 

Ting Zhu's picture

Unexpected two-phase lithiation of amorphous Si

Two-phase electrochemical lithiation in amorphous silicon
Jiangwei Wang, Yu He, Feifei Fan, Xiao-Hua Liu, Shuman Xia, Yang Liu, Thomas Harris, Hong Li, Jian Yu Huang, Scott X. Mao, and Ting Zhu
Nano Letters, Publication Date (Web): January 16, 2013
http://pubs.acs.org/doi/abs/10.1021/nl304379k

Kejie Zhao's picture

Symposium on Li-ion batteries at the SES 50th annual meeting

Dear Colleagues,

Please consider to attend the symposium entitled  "Lithium ion batteries - when chemistry meets mechanics"  at the occasion of the Joint Society of Engineering Science (SES) 50th Annual Technical Meeting and ASME-AMD Annual Summer Meeting, July 28-31, 2013, at Brown University.

The description of the symposium is attached below.

The following speakers will contribute invited talks in the symposium: Yi Cui, William D. Nix, Martin Bazant, Brian Sheldon, Gleb Yushin, Scott Mao, Reiner Moenig, and Yue Qi

Kejie Zhao's picture

Fracture and debonding in lithium-ion batteries with electrodes of hollow core-shell nanostructures

In a novel design of lithium-ion batteries, hollow electrode particles coated with stiff shells are used to mitigate mechanical and chemical degradation.  In particular, silicon anodes of such core-shell nanostructures have been cycled thousands of times with little capacity fading.  To reduce weight and to facilitate lithium diffusion, the shell should be thin.  However, to avert fracture and debonding from the core, the shell must be sufficiently thick.

Postdoc Positions in Li-ion Battery Research, University of Michigan, Ann Arbor

Our GM/UM Advanced Battery Coalition at the department of Mechanical Engineering, University of Michigan is recruiting highly motivated and independent postdoctoral researchers to study in the general field of advanced Li-ion batteries and their fading mechanisms. The candidate should hold a doctor degree in Mechanics, Materials, Chemistry, Physics, or a relevant discipline. Past experience with finite element analysis, atomistic simulations, and programming is preferred.

Kejie Zhao's picture

Lithium-assisted plastic deformation of silicon electrodes in lithium-ion batteries: a first-principles theoretical study

Silicon can host a large amount of lithium, making it a promising electrode for high-capacity lithium-ion batteries.  Recent experiments indicate that silicon experiences large plastic deformation upon Li absorption, which can significantly decrease the stresses induced by lithiation and thus mitigate fracture failure of electrodes. These issues become especially relevant in nanostructured electrodes with confined geometries.

Kejie Zhao's picture

Inelastic hosts as electrodes for high-capacity lithium-ion batteries

Silicon can host a large amount of lithium, making it a promising electrode for high-capacity lithium-ion batteries.  Upon absorbing lithium, silicon swells several times its volume; the deformation often induces large stresses and pulverizes silicon.

Kejie Zhao's picture

Fracture of electrodes in lithium-ion batteries caused by fast charging

During charging or discharging of a lithium-ion battery, lithium is extracted from one electrode and inserted into the other.  This extraction-insertion reaction causes the electrodes to deform.  An electrode is often composed of small active particles in a matrix.  If the battery is charged at a rate faster than lithium can homogenize in an active particle by diffusion, the inhomogeneous distribution of lithium results in stresses that may cause the particle to fracture.  The distributions of lithium and stress in a LiCoO2 particle

Yuhang Hu's picture

Averting cracks caused by insertion reaction in lithium-ion batteries

In a lithium-ion battery, both electrodes are atomic frameworks that host mobile lithium ions. When the battery is being charged or discharged, lithium ions diffuse from one electrode to the other. Such an insertion reaction deforms the electrodes, and may cause the electrodes to crack. This paper uses fracture mechanics to determine the critical conditions to avert cracking. The method is applied to cracks induced by the mismatch between phases in crystalline particles of LiFePO4

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