| abstract |
A battery can include a cathode; an anode; a case; and an electrolyte; wherein the cathode and anode are formed of active material positioned on charge collectors. In one aspect, a battery includes a cathode comprising at least one charge collector; an anode comprising at least one charge collector; a separator; a cell case; and an electrolyte. The cathode and anode are formed of active material positioned on charge collectors. Examples of the aspect can include some, all, or none of the following features. The charge collector contains at least one weakening feature selected from the group consisting of bumps, notches, grooves, cracks, voids, sharp openings, folds, ridges, valleys, and hollow cross-section profiles. |