Understanding the mechanism of formation of solid-electrolyte interphases (SEI) is key to the prospects of lithium metal batteries (LMB). Here, we investigate via cyclic voltammetry, impedance spectroscopy and chronoamperometry the role of kinetics in controlling the properties of the SEI generated from the reduction of propylene carbonate (PC, a typical solvent in LMB). Our observations are co...

Deposition of Li is a major safety concern existing in Li-ion secondary batteries. Here we perform the first in situ high spatial resolution measurement coupled with real-time quantitative electrochemistry to characterize SEI formation on gold using a standard battery electrolyte. We demonstrate that a dendritic SEI forms prior to Li deposition and that it remains on the surface after Li electr...

The formation of the alkyl carbonate-derived solid electrolyte interphase (SEI) enables the use of active materials operating at very cathodic potentials in Li-ion batteries. However, the SEI in semi-solid flow batteries results in a hindered electron transfer between a fluid electrode and the current collector restricting the operating potentials to ca. 0.8 V vs. Li/Li(+) for EC-based electrol...

Silicon is a promising negative electrode for secondary lithium-based batteries, but the electrochemical reversibility of particularly nanostructured silicon electrodes drastically depends on their interfacial characteristics, commonly known as the solid electrolyte interface (SEI). The beneficial origin of certain electrolyte additives or different binders is still discussed controversially ow...

The (de)lithiation process of carbon-coated ZnFe2O4 has been investigated by in situ Raman spectroscopy. Solid electrolyte interphase (SEI) products were detected. Their detection may result from a temporary surface enhancement Raman effect from Zn nanoparticles formed in the conversion reaction at a potential that coincides with SEI formation.

This report supplements the SEI report Evaluation of the Rational Environment (CMU/SEI-88-TR-15) by Peter Feiler, Susan Dart, and Grace Downey. It contains the instantiation of the experiments presented in the Evaluation of Ada Environments by Nelson Weiderman, et al. (see [7]). Overall conclusions and analysis of the Rational Environment can be found in Evaluation of the Rational Environment.

Simulation and the Capability Maturity Model Integrated (CMMI) are both fundamentally process focused with common objectives. Both are tools used to advance process capabilities and performance. Can organizations apply simulation to their business practices to help them achieve higher levels of CMMI maturity? Which specific Process Areas would simulation add the most value? Simulation projects ...

This annual report on graduate software engineering education describes recent SEI educational activities, including the 1988 SEI Curriculum Design Workshop. A model curriculum for a professional Master of Software Engineering degree is presented, including detailed descriptions of six core courses. Fifteen university graduate programs in software engineering are surveyed.

In an article that appeared in a prior volume of this journal, 1 an overview was presented of the formation, structure and scope of purpose of the SUNY Eye Institute (SEI), a collaborative research and educational consortium that initially comprised of members of the ophthalmology departments from the four health science Participants included SEI-affiliated faculty, graduate students, postdocto...