Stabilization of Li-ion battery anodes

A Li-ion battery, comprising:

• a cathode;
• an anode comprising Si-comprising composite particles and a polymer binder, at least one of the Si-comprising composite particles comprising a core and a protective layer;
• an electrolyte ionically coupling the anode and the cathode;
• a separator electrically separating the anode and the cathode;
• and at least one hydrofluoric acid neutralizing agent incorporated into the anode,
• wherein the at least one hydrofluoric acid neutralizing agent is attached to or a part of the at least one Si-comprising composite particle or at least a portion of the polymer binder;
• wherein the at least one hydrofluoric acid neutralizing agent comprises:
• a hydrofluoric acid binding metal derivative salt comprising Ca, Mg, Al, or Cu, or a hydrofluoric acid binding metal oxide comprising Ca, Mg, Al, or Cu, or an amine functional group,
• or a Lewis base, or a combination thereof;
• wherein the separator comprises aluminum oxide, magnesium oxide, aluminum oxyfluoride, magnesium oxyfluoride or a polymer with an amine group.