| abstract |
The present invention relates to a negative electrode material for a lithium ion battery comprising ruthenium and having a chemically treated or coated surface to affect the zeta potential of the surface. The active material consists of particles or particles comprising a core containing ruthenium and wires, wherein the particles have a positive zeta potential in the interval between pH 3.5 and 9.5 and preferably between pH 4 and 9.5. The core is chemically treated with an amine functional metal oxide, or the core is at least partially covered by an OySiHx group, wherein 1 < x < 3, 1 ≦ y ≦ 3 and x > y, or the core is adsorbed Covered with inorganic nanoparticles or cationic polyvalent metal ions or oxides. |