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lithium-ion batteries

Effects of surface tension and electrochemical reactions in Li-ion battery electrode nanoparticles

The size- and shape-dependency of the chemo-mechanical behavior of spherical and ellipsoidal nanoparticles in Li-ion battery electrodes are investigated by a stress-assisted diffusion model and 3D finite element simulations. The model features surface tension, a direct coupling between diffusion and elasticity, concentration-dependent diffusivity, and a Butler-Volmer relation for the description of electrochemical reactions that is modified to account for mechanical effects.

Angelo Simone's picture

Two PhD Positions in Computational Modelling of Structural Batteries at TU Delft

Applications are invited for two PhD positions (four years) in the area of computational modelling in the Computational Mechanics of Materials group of the Faculty of Civil Engineering and Geosciences at Delft University of Technology in the Netherlands.

The successful applicants will work with Dr. Angelo Simone on a project funded by the European Research Council through the ERC Consolidator grant StruBa (Computational Modelling of Structural Batteries). The positions are to commence in May 2015 or as soon as possible thereafter.

Matt Pharr's picture

Variation of Stress with Charging Rate due to Strain-Rate Sensitivity of Silicon Electrodes of Lithium Ion Batteries

Silicon is a promising anode material for lithium-ion batteries due to its enormous theoretical energy density. Fracture during electrochemical cycling has limited the practical viability of silicon electrodes, but recent studies indicate that fracture can be prevented by taking advantage of lithiation-induced plasticity. In this paper, we provide experimental insight into the nature of plasticity in amorphous LixSi thin films. To do so, we vary the rate of lithiation of amorphous silicon thin films and simultaneously measure stresses.

Siva P V Nadimpalli's picture

PhD position in Experimental Solid Mechanics at the New Jersey Institute of Technology

There is an opening for a
PhD student position in Dr. Nadimpalli’s group at the New Jersey Institute of
Technology starting from Fall2014. Candidate with good academic credentials and an interest to work in experimental research projects are encouraged to apply.
Ideal candidate should have a master’s degree in mechanical/materials
science/aerospace or related field with a good background in Solid Mechanics,
Materials Science, and Experimental Methods (including but not limited to SEM,
TEM, and nanofabrication methods).

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