Electrodes for Energy Storage Device Comprising Binders having Hydrophilic Functionality

1 . An electrode comprising

a current collector, and

an active layer on the current collector, wherein the active layer comprises electrode active particles, electrically conducting material and a binder wherein the binder comprises a polymer selected from the group consisting of polyacrylamides, polymethacrylic acid, polyacrylic acid and salts thereof.

2 . The electrode of claim 1 wherein the electrically conductive elements form a network.

3 . The electrode of claim 1 wherein the electrically conductive elements comprise high aspect ratio carbon elements.

4 . The electrode of claim 3 wherein the high aspect ratio carbon elements comprise carbon nanotubes.

5 . The electrode of claim 1 wherein the polymer comprises repeat units of the formula:

where R is independently in each occurrence H, or one of R can be an alkyl group of 1 to 3 carbon atoms;

P is —COOR 1 where R 1 is H, a single valent metal ion or P is —C(O)N(R 2 ) 2 where R 2 is independently in each occurrence H, or an alkyl group of 1 to 3 carbon atoms.

6 . The electrode of claim 1 wherein the polymer is a homopolymer.

7 . An energy storage device comprising the electrode of claim 1 .

8 . A method of making the electrode of claim 1 comprising

providing a slurry comprising the electrically conductive elements, the binder and the electrode active material in water, alcohol or a combination thereof, and

coating the slurry onto a current collector, and drying to remove the solvent.