Medical device having lithium-ion battery

A device for providing at least one of a therapeutic treatment and a diagnostic function to a patient comprising:

• a rechargeable battery for providing power to the device, the battery comprising:
• a positive electrode comprising a current collector and an active material comprising a material selected from the group consisting of LiCoO2, LiMn2O4, LiNi1/3Co1/3Mn1/3O2, LiAlxCoyNi(1−x−y)O2 where x is between approximately 0.05 and 0.3 and y is between approximately 0.1 and 0.3, LiTixCoyNi(1−x−y)O2 where x is between approximately 0.05 and 0.3 and y is between approximately 0.1 and 0.3, and combinations thereof;
• a negative electrode comprising a negative current collector provided as a foil and an active material provided on the negative current collector, the negative current collector comprising aluminum and the active material provided on the negative current collector comprising a lithium titanate material;
• a liquid electrolyte;
• and
• a separator comprising a polymeric material provided between the positive electrode and the negative electrode, the separator comprising a polyolefin laminate.

A system for providing at least one of a therapeutic treatment and a diagnostic function to a patient comprising:

• a lithium-ion battery configured to provide power to the system and being capable of being charged and discharged, the lithium-ion battery comprising:
• a positive electrode comprising an aluminum current collector and an active material provided in contact with the aluminum current collector and selected from the group consisting of LiCoO2, LiMn2O4, LiNi1/3Co1/3Mn1/3O2, LiAlxCoyNi(1−x−y)O2 where x is between approximately 0.05 and 0.3 and y is between approximately 0.1 and 0.3, LiTixCOyNi(1−x−y)O2 where x is between approximately 0.05 and 0.3 and y is between approximately 0.1 and 0.3, and combinations thereof;
• a negative electrode comprising an aluminum foil current collector and an active material, the active material provided on the current collector of the negative electrode comprising Li4Ti5O12;
• a liquid electrolyte;
• and
• a polymeric separator provided intermediate the positive electrode and the negative electrode, the polymeric separator comprising a polyolefin laminate that includes pores;
• wherein the positive electrode and the negative electrode have a zero voltage crossing potential above a decomposition potential of the LiCoO2 active material.