US Patent 8105714 Lithium-ion battery

A lithium-ion battery includes a plurality of generally planar positive and negative electrodes arranged in alternating fashion to form an electrode stack. Each of the electrodes includes a current collector having two opposed surfaces and an active material provided on at least one of the two opposed surfaces. The active material of the negative electrodes has a potential that is greater than 0.2 volts versus a reference electrode. The area of the current collectors of the negative electrodes covered by active material is not larger than the area of the current collectors of the positive electrodes covered by active material.