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    • Beyond the Lab
    • History

Self-assembling 3D battery would charge in seconds

A cross-campus collaboration led by Ulrich Wiesner, the Spencer T. Olin Professor of Engineering in the Department of Materials Science and Engineering, addresses this demand with a novel energy storage device architecture that has the potential for lightning-quick charges.

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energy
  • Read more about Self-assembling 3D battery would charge in seconds

Origin of Vertical Orientation in Two-Dimensional Metal Halide Perovskites and its Effect on Photovoltaic Performance

MHPs are unique in that they combine low-cost solution processability with superb electronic quality that is comparable to, or surpasses, that of the state-of-the-art epitaxial grown semiconductors. What is particularly exciting about MHPs is that they can be manufactured into lightweight flexible solar cells that can provide power in locations that are difficult for traditional solar cells - drones, cars, soldiers and backpackers.

What did the Scientists Discover?

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energy
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First self-assembled superconductor structure created

Ulrich Wiesner, the Spencer T. Olin Professor of Engineering, led the group, which included researchers in engineering, chemistry and physics.

The group’s findings are detailed in a paper published in Science Advances, Jan. 29.

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energy
engineering
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Room-temperature lithium metal battery closer to reality

But these batteries are not in common use today because, when recharged, they spontaneously grow treelike bumps called dendrites on the surface of the negative electrode.

Over many hours of operation, these dendrites grow to span the space between the negative and positive electrode, causing short-circuiting and a potential safety hazard.

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energy
  • Read more about Room-temperature lithium metal battery closer to reality

Best of both worlds: Team proposes novel energy storage model

The technology – based on a covalent organic framework (COF) infused with an electronically conducting polymer thin film – could benefit numerous technologies including automotive, by speeding up the charging process, extending single-charge range and even incorporating the device into the body of the car itself.

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energy
  • Read more about Best of both worlds: Team proposes novel energy storage model

CHESS facility helps scale up solar cells

Visiting scientists from the University of Virginia have used the facilities of the Cornell High Energy Synchrotron Source (CHESS) to observe their chemistry in action. By firing high-intensity X-rays into a sample in a process known as X-ray crystallography, CHESS scientists took a series of snapshots of a material as it crystallized, showing how changes in the formula affect the process of crystal growth.

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energy
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Visualization of sulfur cathodes in Li-S batteries

Among those systems, lithium sulfur batteries are one of the most attractive candidates, because elemental sulfur has a high theoretical capacity of 1,672 mAh g-1, is abundant, inexpensive and environmentally benign. However, there are several challenges hindering the practical deployment of Li-S batteries.

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energy
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X-rays record structural changes inside lithium batteries

Quinones, in general, and anthraquinones, in particular, are especially attractive due to their ability to reversibly exchange multiple electrons per formula unit. When used as the active electrode material in a real lithium-ion battery (LIB), crystalline anthraquinone (in powder form) reversibly changes crystal packing as a function of state-of-charge (redox state), with a well-defined voltage plateau appearing concomitantly with new structural phases.

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energy
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Improving HOIP solar cells by controlling structural instabilities

Their potential application is, however, currently limited as HOIPs shows structural instability under high temperature, humidity, or even extended light exposure. Understanding of the perovskite structural stability and phase transitions is deemed both timely and essential.

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energy
materials
Jacob Ruff
  • Read more about Improving HOIP solar cells by controlling structural instabilities

Materials scientist Jin Suntivich to study fuel cells differently

Transition-metal oxides are a class of high-performance catalysts with great potential, but the way in which they govern electrochemical reactions that turn fuel into energy remains poorly understood. Jin Suntivich, assistant professor of materials science and engineering, hopes to change that by studying catalysts in a new way, and he has been awarded $750,000 by the U.S. Department of Energy’s 2017 Early Career Research Program.

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energy
  • Read more about Materials scientist Jin Suntivich to study fuel cells differently

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