M
Matt Pharr
Researcher at Texas A&M University
Publications - 71
Citations - 5406
Matt Pharr is an academic researcher from Texas A&M University. The author has contributed to research in topics: Lithium & Medicine. The author has an hindex of 25, co-authored 58 publications receiving 3929 citations. Previous affiliations of Matt Pharr include University of Illinois at Urbana–Champaign & Harvard University.
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Lab-on-Skin: A Review of Flexible and Stretchable Electronics for Wearable Health Monitoring
TL;DR: The term "lab-on-skin" is introduced to describe a set of electronic devices that have physical properties, such as thickness, thermal mass, elastic modulus, and water-vapor permeability, which resemble those of the skin, which provide accurate, non-invasive, long-term, and continuous health monitoring.
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Fracture of electrodes in lithium-ion batteries caused by fast charging
TL;DR: In this paper, the distributions of lithium and stress in a LiCoO2 particle are calculated and the energy release rates are then calculated for the particle containing preexisting cracks.
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Lithium-Assisted Plastic Deformation of Silicon Electrodes in Lithium-Ion Batteries: A First-Principles Theoretical Study
Kejie Zhao,Wei L. Wang,John M. Gregoire,Matt Pharr,Zhigang Suo,Joost J. Vlassak,Efthimios Kaxiras +6 more
TL;DR: It is found that lithium insertion leads to breaking of Si-Si bonds and formation of weaker bonds between neighboring Si and Li atoms, which results in a decrease in Young's modulus, a reduction in strength, and a brittle-to-ductile transition with increasing Li concentration.
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Large Plastic Deformation in High-Capacity Lithium-Ion Batteries Caused by Charge and Discharge
TL;DR: In this article, a theory that couples large amounts of lithiation and deformation is proposed to analyze the deformation of a small element of an electrode under stresses, and the theory is combined with a diffusion equation to analyze a spherical particle of a battery being charged and discharged at a constant rate.
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Concurrent Reaction and Plasticity during Initial Lithiation of Crystalline Silicon in Lithium-Ion Batteries
Kejie Zhao,Matt Pharr,Qiang Wan,Qiang Wan,Wei L. Wang,Efthimios Kaxiras,Joost J. Vlassak,Zhigang Suo +7 more
TL;DR: In this article, a model of concurrent reaction and plasticity is presented to accommodate the reaction-induced volumetric expansion by plastic deformation of the lithiated silicon in an electrochemical cell.