A new study shows how energy back transfer from Er3+ to Yb3+ ions shifts upconversion luminescence from green to yellow at high pump power densities. Subject of Research: Energy back transfer between Er3+ and Yb3+ ions in upconversion luminescent molybdate phosphors and crystals Article…
Carbon nanotubes play a central role in the design. According to the authors, the composite structure built around the nanotubes prevents excessive growth of the primary particles and supplies highly conductive pathways throughout the material. In electrochemical tests, the composite…
A new review details how polyoxometalate–metal organic framework hybrids are boosting the performance of batteries, supercapacitors, fuel cells, water electrolyzers and CO2 electrolyzers.
Researchers report a prelithiated polyurethane-LAGP composite electrolyte that reaches high room-temperature ionic conductivity and long cycling stability in laboratory solid-state cells.
To hold those microscopic metal spheres in place, researchers embed them in a material such as a polymer or rubber. But that means the containing material also fills the spaces between the droplets, raising an obvious question: how does the…
A new review in Ionics summarizes how defect engineering, through surface delithiation and bulk vacancy modulation, can improve the air stability of garnet-type LLZO solid electrolytes. Garnet-type LLZO solid electrolytes are widely regarded as key materials for high-energy-density all-solid-state lithium…
Aloe vera-assisted synthesis produced defect-rich NiO nanopyramids that delivered specific capacitances of 674, 468 and 358 F g−1 at 0.5, 4 and 10 A g−1. Researchers have synthesized nickel oxide (NiO) nanopyramids using Aloe vera as a green synthesis aid and report that the defect-rich material delivers…
Scientists converted industrial lignin into fluorescent carbon dots embedded in iron-cobalt hydroxide electrodes that store record charge and, after the supercapacitor wears out, still degrade antibiotics in water.
Real-time imaging reveals how tiny structural changes inside layered nanochannels track shifts in ionic current and device behavior. A recent study in the journal Nature Materials reveals the mechanical origin of ionic memory in two-dimensional (2D) nanochannels. By combining optical imaging…
Lithium is essential for rechargeable batteries used in electric vehicles and renewable energy storage, but recovering it from natural salt-lake brines remains difficult because those solutions often contain large amounts of magnesium and other dissolved salts. Similar challenges arise in…
Battery chemistry: lithium-ion, solid-state and sodium-ion research, electrolytes and electrode materials, recycling and supercapacitors.
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