Electrode having current correcting layers
Electrodes having at least one current correcting layer between the current collector and the separator drive electron flow in a direction perpendicular to the X-Y plane. Such an electrode includes a current collector, a first active material layer coated on the current collector, a first current correcting layer on the first active material layer opposite the current collector and a second active material layer on the first current correcting layer opposite the first active material layer. The first current correcting layer is a highly conductive, porous material that is not electrochemically active, the first current correcting layer being uniformly formed along an X-Y plane of the electrode.
1. An electrode comprising:
a current collector;
a first active material layer coated on the current collector;
a first current correcting layer on the first active material layer opposite the current collector; and
a second active material layer on the first current correcting layer opposite the first active material layer, wherein:
the first current correcting layer is a conductive, porous material that is not electrochemically active,
the first current correcting layer is uniformly formed along an X-Y plane of the electrode and configured to drive electron flow in a direction perpendicular to the X-Y plane,
the first current correcting layer comprises dimples in both active material-facing surfaces, and
active particles of the first active material layer and the second active material layer seat in the dimples on a respective active material-facing surface.
2. The electrode of claim 1 , wherein the first current correcting layer is formed from one or more of carbon black, graphene, carbon nanotubes, metal powder and conductive polymer.
3. The electrode of claim 2 , wherein the first current correcting layer further comprises a binder material.
4. The electrode of claim 1 , wherein the first current correcting layer is between 10 nm and 1 micron thick.
5. The electrode of claim 1 , further comprising:
a second current correcting layer on the second active material layer; and
a third active material layer on the second current correcting layer opposite the second active material layer, wherein:
the second current correcting layer is additional conductive, porous material that is not electrochemically active,
the second current correcting layer is uniformly formed along an X-Y plane of the electrode and configured to work with the first current correcting layer to drive electron flow in the direction perpendicular to the X-Y plane, and
the second current correcting layer comprises dimples in both active material-facing surfaces.
6. The electrode of claim 5 , wherein the second current correcting layer is formed from one or more of carbon black, graphene, carbon nanotubes, metal powder and conductive polymer.
7. The electrode of claim 6 , wherein the second current correcting layer further comprises a binder material.
8. The electrode of claim 5 , wherein the second current correcting layer is between 10 nm and 1 micron thick.
9. The electrode of claim 5 , wherein the first current correcting layer and the second current correcting layer are between 10 and 20 microns apart.