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Applications for porous fibrous materials range from electrochemical substrates to web reinforcement in polymeric composite materials. The details of local load transfer are studied in a class of cost-effective, stochastic fibrous networks used in battery applications, which form the substrate for a composite electrode. The connectivity of these materials(More)
Maximum depth-to-particle-dimension ratios in which systems can be treated as two-dimensional ~2D! rather than threedimensional ~3D! systems in determining percolative properties have not been reported. This problem is of great technological significance. 3D solutions for percolation in even low-density systems pose much more intensive computational(More)
Several promising Li-ion battery technologies incorporate nanoarchitectured carbon networks, typically in the form of whisker/ particle blends bonded with thermoplastic binders to form the anodes. Degradation of these materials is currently a persistent problem, with damage presenting as blistering and/or delamination of the electrode. Both material(More)
We performed coupled theoretical/experimental studies on Li-ion cells to quantify reductions in anode resistivity and/or contact resistance between the matrix and the current collector with the addition of amorphous carbon coatings and anode compression. We also aimed to identify microstructural changes in constituent particles due to anode compression,(More)
Increased thermal conductivity, electronic conductivity, and reversible capacity (i.e., reduced irreversible capacity loss, or ICL) have been demonstrably achievable by compression of anodes into higher volume fraction plates, though excessive compression can impair Li-ion battery performance. In our previous study, we correlated conductivity and(More)
SERS biosensor has demonstrated remarkable potential to analyze various bio/chemical targets with ultrahigh sensitivity. However, the development of universal SERS biosensing platforms with a uniform and reproducible structure that can quantitatively detect a broad range of trace analytes remains a significant challenge. The production of SERS nanotags with(More)
A Numerical Study Y.-H. Chen,* C.-W. Wang,** G. Liu, X.-Y. Song, V. S. Battaglia,** and A. M. Sastry** Department of Mechanical Engineering, Department of Biomedical Engineering, and Department of Material Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2125, USA Environmental Energy Technologies Division, Lawrence Berkeley(More)
Extraction of Layerwise Conductivities in Carbon-Enhanced, Multilayered LiFePO4 Cathodes C.-W. Wang, A. M. Sastry,* K. A. Striebel,* and K. Zaghib* Department of Mechanical Engineering, Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2125, USA Lawrence Berkeley National Laboratory, Environmental Energy Technologies(More)
Coupled computational fluid dynamics and finite element analyses were used to determine the material properties of the egg and jelly layer of the sea urchin Arbacia punctulata. Prior experimental shear flow results were used to provide material parameters for these simulations. A Neo-Hookean model was used to model the hyperelastic behaviors of the jelly(More)