Electrolyte or electrode additives for increasing metal content in metal-ion batteries

A Li-ion battery comprising:

• an anode electrically connected to an anode current collector;
• a cathode electrically connected to a cathode current collector;
• a separator interposed between the anode and the cathode;
• and
• an electrolyte ionically coupling the anode and the cathode,
• wherein an anode composition of the anode comprises silicon (Si),
• wherein an electrolyte composition of the electrolyte comprises LiPF6 salt,
• wherein a cathode composition of the cathode comprises (i) active Li-comprising cathode material selected from lithium cobalt oxide, lithium nickel cobalt aluminum oxide (NCA), lithium nickel cobalt manganese oxide (NCM), or a lithium metal oxy-fluoride and (ii) a high capacity Li-comprising cathode additive, and
• wherein the high capacity Li-comprising cathode additive exhibits at least about 10% higher volumetric capacity than the active Li-comprising cathode material,
• wherein the high capacity Li-comprising cathode additive is in direct contact with an electrically conductive material, and
• wherein the electrically conductive material is arranged as a shell layer or a coating of the high capacity Li-comprising cathode additive.