Three-dimensional battery with compressible cathode

摘要

A secondary battery for cycling between a charged state and a discharged state is provided. The secondary battery has a group of anode structures, a group of cathode structures, and an electrode assembly including an electrically insulating microporous separator material. The electrode assembly further includes a set of electrode constraints that at least partially inhibit the longitudinal increase of the electrode assembly during a cycle of the secondary battery between a charged state and a discharged state. Each member of the group of anode structures has a first cross-sectional area A1 when the secondary battery is in a charged state and a second cross-sectional area A2 when the secondary battery is in a discharged state; Each member of the cathode structure has a first cross-sectional area C1 when the secondary battery is in a charged state, has a second cross-sectional area C2 when the secondary battery is in a discharged state, and A1 , A2, and C1 is smaller than C2.