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September 2021

MEAM Seminar: “Kirigami: Programming Cutting and Folding from Microscale to Meter Scale”

September 28 at 10:00 AM - 11:30 AM
Zoom – Email MEAM for Link, peterlit@seas.upenn.edu

Programmable shape-shifting materials can take different physical forms to achieve multifunctionality in a dynamic and controllable manner. By introducing holes and cuts in 2D sheets, we demonstrate dramatic color and shape change and super-conformability via collapsing or expanding of the hole arrays in the micro- and macroscales. When choosing the cuts and geometry correctly, we show folding into the third dimension, known as kirigami. By programming the geometry of cuts and folding angles, we explore their potential applications in water…

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MSE Seminar: “Microstructural Design Principles for Achieving Stable Electrochemical Interfaces for Metal Anodes”

September 30 at 12:30 PM - 1:30 PM

Lithium metal battery systems (LMBs) are being sought as an ultimate replacement to LIBs, potentially increasing the cell energy by over fifty percent due to the high capacity and low voltage of the metal anode. Analogous improvement in energy is possible with sodium metal batteries (NMBs) and with potassium metal batteries (KMBs), where existing ion insertion anodes can be replaced by plating/stripping metal. However, in all three cases safety and performance are compromised by an unstable solid electrolyte interphase (SEI)…

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October 2021

MSE Seminar: “Metals and Alloys: A Critical Weapon in the Fight against Climate Change”

October 7 at 12:15 PM - 1:30 PM
Auditorium, LRSM Building, 3231 Walnut Street
Philadelphia, PA 19104 United States
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Today in the U.S., we deal with the severe, wide ranging effects of climate change from the West to East Coast in the form of heat waves, drought, wildfires, and flooding. To end these disasters, we need to drastically change the way we produce and use energy. For example, in 2020, over 72 % of the energy consumed in the U.S. came from burning natural gases (31.5 %), coal (9.21 %) and petroleum (32.2 %), which are all major contributors…

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