Abstract: This invention relates to a negative electrode material for lithium-ion batteries comprising silicon and having a chemically treated or coated surface influencing the zeta potential of the surface. The active material consists of particles or particles and wires comprising a core comprising silicon, wherein the particles have a positive zeta potential in an interval between pH 3.5 and 9.5, and preferably between pH 4 and 9.5. The core is either chemically treated with an amino-functional metal oxide, or the core is at least partly covered with OySiHx groups, with 1<x<3, 1?y?3, and x>y, or is covered by adsorbed inorganic nanoparticles or cationic multivalent metal ions or oxides.

Abstract: Compositions having copper flakes coated with silver, where the silver is present as a hermetically closed metal shell around the copper, are described. The hermetically closed metal shell can limit oxidation of copper for at least 365 days at a temperature of less than 100° C. The composition can also contain palladium in an amount of about 1% or less by weight of silver in the shell. Palladium limits the migration of copper from the core flakes to the silver shell at temperatures below 250° C. Methods of manufacturing copper flakes coated can include the steps of treating copper flakes with an acid to form acid treated copper flakes, treating the acid treated copper flakes with a polyamine to form polyamine treated copper flakes, depositing silver on the polyamine treated copper flakes to form copper flakes comprising silver deposits, and depositing silver onto the copper flakes comprising silver deposits.

Abstract: This invention relates to a negative electrode material for lithium-ion batteries comprising silicon and having a chemically treated or coated surface influencing the zeta potential of the surface. The active material consists of particles or particles and wires comprising a core comprising silicon, wherein the particles have a positive zeta potential in an interval between pH 3.5 and 9.5, and preferably between pH 4 and 9.5. The core is either chemically treated with an amino-functional metal oxide, or the core is at least partly covered with OySiHx groups, with 1<x<3, 1?y?3, and x>y, or is covered by adsorbed inorganic nanoparticles or cationic multivalent metal ions or oxides.

Abstract: This invention relates to a negative electrode material for lithium-ion batteries comprising silicon and having a chemically treated or coated surface influencing the zeta potential of the surface. The active material consists of particles or particles and wires comprising a core (11) comprising silicon, wherein the particles have a positive zeta potential in an interval between pH 3.5 and 9.5, and preferably between pH 4 and 9.5. The core is either chemically treated with an amino-functional metal oxide, or the core is at least partly covered with OySiHx groups, with 1<x<3, 1<y<3, and x>y, or is covered by adsorbed inorganic nanoparticles or cationic multivalent metal ions or oxides.

Abstract: The present disclosure relates to a method for making a gold nanoparticle dispersion. The method includes providing a first solution that has gold ions in a liquid medium, adding NTA molecules to the first solution to form a gold nanoparticle dispersion. When the NTA molecules are added to the first solution, the NTA molecules act as a reducing agent to reduce the gold ions to gold atoms, after which the gold atoms nucleate to form gold nanoparticles. The excess NTA molecules then attach to the surface of the gold nanoparticles to stabilize the dispersion. The present disclosure also relates to a dispersion composition that includes a liquid medium, gold nanoparticles dispersed throughout the liquid medium, and NTA molecules directly coating the gold nanoparticles.