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Uppsala team develops composite polymer dots for efficient, stable H2 production from water and sunlight

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Researchers at Uppsala University have developed photocatalytic composite polymer nanoparticles (“polymer dots”) that show promising performance and stability for the production of hydrogen from water and sunlight. These polymer dots are designed to be both environmentally friendly and cost-effective. Photograph: P-Cat.

Polymer 397
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Polymer-dipped carbon nanotube catalysts equal or outperform platinum catalysts in fuel cells; potential for significant cost reduction

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Researchers at Case Western University have developed catalysts made of carbon nanotubes dipped in a polymer solution that equal the energy output and otherwise outperform platinum catalysts in fuel cells. Credit: ACS, Wang et al. Click to enlarge. A paper on their work is published in the Journal of the American Chemical Society.

Polymer 270
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Self-healing polymer wrapper enables longer cycle life in silicon anodes for Li-ion batteries

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Top: The stress of repeated swelling and shrinking shatters a conventional silicon electrode and its polymer binding. Bottom: An electrode coated with stretchy, self-healing polymer remains intact. (C. To make the self-healing coating, the scientists deliberately weakened some of the chemical bonds within polymers. Wang et al.,

Li-ion 230
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Researchers Develop Novel High-Performance Polymer Tin Sulfur Lithium Ion Battery

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Sketch of the Sn/C/CGPE/ Li 2 S/C polymer battery. The battery is formed by a Sn/C composite anode, a PEO-based gel polymer electrolyte, and a Li 2 S/C cathode. Hassoun and Scrosati also replaced the common liquid organic solutions with a gel-type polymer membrane. PEO=poly(ethylene oxide). Credit: Hassoun and Scrosati.

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Georgia Tech team develops conversion-type iron-fluoride Li battery cathode with solid polymer electrolyte

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Researchers at Georgia Tech have developed a promising new conversion-type cathode and electrolyte system that replaces expensive metals and traditional liquid electrolyte with lower cost transition metal fluorides and a solid polymer electrolyte. The Georgia Tech team sought to overcome those obstacles by using the solid polymer electrolyte.

Polymer 230
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IIT, Argonne team designs Li2O-based Li-air battery with solid electrolyte; four-electron reaction for higher energy density

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By using a composite polymer electrolyte based on Li 10 GeP 2 S 12 nanoparticles embedded in a modified polyethylene oxide polymer matrix, we found that Li 2 O is the main product in a room temperature solid-state lithium-air battery. … This chemical sequence stores and releases energy on demand.

Li-ion 418
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New conductive polymer addresses volumetric change issue with silicon anodes for Li-ion batteries; high-capacity and longer cycle life reported

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At left, a traditional approach combines Si (blue spheres) with a polymer binder (light brown) plus carbon (dark brown spheres). At right, the new conductive polymer (purple) continues to bind tightly to the Si particles despite repeated swelling and shrinking. 1 in Si after 650 cycles without any conductive additive. —Gao Liu.

Polymer 199