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- Written by: Glenn and Rick
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Although the world is set to leave fossil fuels behind and charge full speed ahead towards the electric revolution, the technology necessary for electric vehicles is not quite ready for that transition. Lithium-ion batteries are still too heavy, too expensive and take too long to charge - not to mention that the lithium mining process is not exactly a “green” replacement for fossil fuels. "A lithium-metal battery is considered the holy grail for battery chemistry because of its high capacity and energy density. But the stability of these batteries has always been poor," said Li. To address this limitation, Li and his team have developed a stable, lithium-metal solid-state battery that can be charged and discharged at least 10,000 times at a high current density. They have published their findings in the journal Nature. "Our research shows that the solid-state battery could be fundamentally different from the commercial liquid electrolyte lithium-ion battery," said Li. "By studying their fundamental thermodynamics, we can unlock superior performance and harness their abundant opportunities."
https://www.labroots.com/trending/chemistry-and-physics/20448/lithium-metal-batteries-vs-lithium-ion
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- Written by: Glenn and Rick
- Category: Science
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There is currently considerable interest in the development of organic solar cells (OSCs) because of the emergence of so-called non-fullerene acceptors, which has pushed the power conversion efficiencies of OSCs close to those of inorganic and hybrid semiconductor solar cells. Chen et al. combined experimental and theoretical study of more than 30 non-fullerene OSC devices to demonstrate the key electronic structure parameters of the donor-acceptor blends, establish the relationships between these parameters and the nonradiative voltage losses, and show that these losses can be reduced without sacrificing the charge generation efficiencies.This work opens the way for the future rational design of high-efficiency OSC materials. And...... Loss of individual trees within a persistent forest can have unforeseen effects. Such losses occur through drivers such as disease and drought and can occur within a specific tree species or across species. Fleming et al. conducted a large meta-analysis of mostly North American and Australian studies and found both positive and negative impacts on forest animal abundance.
https://science.sciencemag.org/content/sci/372/6548/1301.4.full.pdf
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