Fullerene-based proton conductive materials
View Patent ↗A fullerene-based proton conductor including a proton conductive functional group connected to the fullerene by an at least partially fluorinated spacer molecule. Also, a polymer including at least two of the proton conductors that are connected by a linking molecule. Further, an electrochemical device employing the polymer as a proton exchange membrane, whereby the device is able to achieve a self-humidifying characteristic.
1. An electrochemical device comprising:
a first electrode,
a second electrode; and
a polymer disposed between the first electrode and the second electrode allowing one or more protons to be conducted between the first and second electrodes, said polymer comprises a plurality of proton conductors, each comprising a fullerene molecule, a spacer molecule attached to said fullerene molecule wherein said spacer molecule comprising an at least partially fluorinated molecule, a proton conductive functional group attached to said spacer molecule, and at least one linking molecule connected between at least two of said proton conductors.
2. The electrochemical device of claim 1 , wherein said linking molecule comprises an at least partially fluorinated hydrocarbon molecule.
3. The electrochemical device of claim 2 , wherein said linking molecule is selected from the group consisting of a partially fluorinated compound, a perfluorinated compound and combinations thereof.
4. The electrochemical device of claim 3 , wherein said perfluorinated compound has the general formula C n F 2n , wherein n is a natural number.
5. The electrochemical device of claim 3 , wherein said perfluorinated compound includes CF 2 .
6. The electrochemical device of claim 1 , wherein said linking molecule is longer than said spacer molecule.
7. The electrochemical device of claim 1 , wherein said linking molecule includes an additional functional group.
8. The electrochemical device of claim 7 , wherein said additional functional group is selected from the group consisting of an ether, an ester, an amide, a ketone, an acidic group and combinations thereof.
9. The electrochemical device of claim 1 , wherein said linking molecule comprises an aryl group.
10. The electrochemical device of claim 1 , wherein said linking molecule comprises an at least partially fluorinated molecule.
11. The electrochemical device of claim 1 , wherein said linking molecule is connected to the fullerene molecule of at least two of said proton conductors.
12. The electrochemical device of claim 1 , wherein said linking molecule is connected to the spacer molecules of at least two of said proton conductors.
13. The electrochemical device of claim 12 , wherein at least one fullerene molecule of at least two of said proton conductors has attached thereto an additional functional group selected from the group consisting of an alkyl group, an aryl group, a non-fluorinated molecule, a partially fluorinated molecule, a perfluorinated molecule, an ether group, an ester group, an amide group, a keto group and combinations thereof.
14. The electrochemical device of claim 13 , wherein said linking molecule is selected from the group consisting of a partially fluorinated, a perfluorinated, sulfonylimide molecule and combinations thereof.
15. The electrochemical device of claim 14 , wherein said linking molecule includes an additional functional group selected from the group consisting of ethers, esters, amides, keto groups and combinations thereof.
16. The electrochemical device according to claim 1 , wherein said polymer comprises a film having a thickness ranging from about 20 μm to about 30 μm.
17. The electrochemical device according to claim 1 , wherein said electrochemical device comprises a hydrogen fuel cell.
18. The electrochemical device according to claim 17 , wherein said polymer comprises a film having a thickness allowing said fuel cell to be self-humidifying.
19. The electrochemical device according to claim 1 , wherein said electrochemical device comprises an electrolysis cell.
20. The electrochemical device according to claim 1 , wherein said electrochemical device comprises a capacitor.