CONDUCTIVE ADHESIVE FOR BIODEGRADABLE ELECTROCHEMICAL DEVICES AND METHODS THEREOF
An electrochemical device is described, including a first electrochemical cell, a second electrochemical cell, connected in series to the first electrochemical cell, and a biodegradable conductive adhesive may include a conductive additive and a copolymer including at least two polycaprolactone chains attached to a polymeric center block, where the polymeric center block may include polyvinyl alcohol, disposed between the first electrochemical cell and the second electrochemical cell. A biodegradable conductive adhesive includes a hydrogel which may include a copolymer having at least two polycaprolactone chains attached to a polymeric center block, where the polymeric center block may include polyvinyl alcohol. Implementations of the biodegradable conductive adhesive may include a conductive additive or a salt. The biodegradable adhesive can include a dried hydrogel, where the hydrogel is biodegradable.
1 . An electrochemical device, comprising:
a first electrochemical cell;
a second electrochemical cell, connected in series to the first electrochemical cell; and
a biodegradable conductive adhesive comprising a conductive additive and a copolymer including at least two polycaprolactone chains attached to a polymeric center block, wherein the polymeric center block comprises polyvinyl alcohol, disposed between the first electrochemical cell and the second electrochemical cell.
2 . The electrochemical device of claim 1 , wherein:
the first electrochemical cell further comprises a first anode, a first cathode, and a first biodegradable electrolyte composition disposed between the first anode and the first cathode; and
the second electrochemical cell further comprises a second anode, a second cathode, and a second biodegradable electrolyte composition disposed between the second anode and the second cathode.
3 . The electrochemical device of claim 2 , wherein the biodegradable conductive adhesive forms a connection between the first cathode of the first electrochemical cell and the second anode of the second electrochemical cell.
4 . The electrochemical device of claim 1 , wherein the first electrochemical cell comprises a stacked geometry.
5 . The electrochemical device of claim 1 , wherein the second electrochemical cell comprises a stacked geometry.
6 . The electrochemical device of claim 1 , wherein the biodegradable conductive adhesive further comprises a hydrogel of the copolymer and a salt dispersed in the hydrogel of the copolymer.
7 . The electrochemical device of claim 1 , wherein the conductive additive comprises silver.
8 . The electrochemical device of claim 1 , wherein the conductive additive comprises a flake-shaped particle.
9 . The electrochemical device of claim 1 , wherein the conductive additive comprises carbon.
10 . The electrochemical device of claim 1 , wherein the conductive additive is present in the biodegradable conductive adhesive in an amount from about 25 wt % to about 95 wt % based on a total weight of the biodegradable conductive adhesive.
11 . The electrochemical device of claim 1 , further comprising a third electrochemical cell, connected in series to the second electrochemical cell.
12 . A method of assembling a biodegradable electrochemical device, comprising:
adhering a first component of a biodegradable electrochemical cell to a second component of the biodegradable electrochemical cell using a biodegradable conductive adhesive; and
drying the biodegradable adhesive; and
wherein the biodegradable conductive adhesive comprises a copolymer having at least two polycaprolactone chains attached to a polymeric center block, wherein the polymeric center block comprises polyvinyl alcohol.
13 . The method of claim 12 , wherein the biodegradable conductive adhesive further comprises a conductive additive.
14 . The method of claim 13 , wherein the biodegradable conductive adhesive comprises before the drying a biodegradable hydrogel including the copolymer and water.
15 . The method of claim 13 , wherein the conductive additive further comprises silver.
16 . A biodegradable conductive adhesive, comprising:
a hydrogel comprising a copolymer having at least two polycaprolactone chains attached to a polymeric center block, wherein the polymeric center block comprises polyvinyl alcohol; and
water; and
wherein the hydrogel is biodegradable.
17 . The biodegradable conductive adhesive of claim 16 , further comprising a conductive additive.
18 . The biodegradable conductive adhesive of claim 17 , wherein the conductive additive comprises silver.
19 . The biodegradable conductive adhesive of claim 16 , further comprising a salt.
20 . A biodegradable adhesive, comprising:
a dried hydrogel comprising a copolymer including at least two polycaprolactone chains attached to a polymeric center block, wherein the polymeric center block comprises polyvinyl alcohol; and
wherein the hydrogel is biodegradable.