Browsing by Author "Salvatierra, Rodrigo Villegas"
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Item Alkali-metal anode with alloy coating applied by friction(2024-05-14) Tour, James M.; Salvatierra, Rodrigo Villegas; Luong, Duy Xuan; Rice University; United States Patent and Trademark OfficeAn electrochemical cell with a lithium-metal anode that suppresses dendrite formation and can be fabricated using a simple, inexpensive, and solvent-free process. The anode is coated with a layer of disordered nanomaterial, saturated with lithium ions, that suppresses dendrite formation during charging. The dendrite-suppression coating can be applied simply using a dry, abrasive technique in which the lithium-metal anode is alternately abraded to roughen the surface and polished using a polishing powder of a material that alloys with the lithium.Item Sulfurized carbon cathodes(2023-03-14) Tour, James M.; Salvatierra, Rodrigo Villegas; Silva, Gladys Anahi Lopez; Raji, Abdul-rahman O.; Rice University; William Marsh Rice University; United States Patent and Trademark OfficeAlkali metal-sulfur cells and batteries with cathode layers that store alkali metal charge carriers (e.g., lithium ions) in agglomerates of sulfurized carbon. The cathode layers lack costly and environmentally unfriendly nickel and cobalt. The cathode layers are composites that include agglomerates of sulfurized-carbon particles in a conductive binder and interconnected by sp2-bonded carbon materials, such as carbon nanotubes or nanoribbons, that extend within the agglomerates and between the sulfurized-carbon particles.