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US 7,842,410 B2Granted
Polymer electrolyte membrane and fuel cell including the polymer electrolyte membrane
AssigneeSamsung SDI Co., Ltd.
InventorsJin-gyu Lee, Sang-kook Mah, Myung-sup Jung, Young-gyoon Ryu, Jae-jun Lee, Do-yun Kim
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Abstract
A solid acid including a carbon nanotube (CNT), a spacer group combined with the CNT and an ionically conductive functional group connected to the spacer group. A polymer electrolyte membrane may include the same composition, and may be used in a fuel cell. The polymer electrolyte membrane using the solid acid has excellent ionic conductivity and suppresses the cross-over of methanol. The polymer electrolyte membrane is used as an electrolyte membrane of a fuel cell, for example, a direct methanol fuel cell.
Claims10
A solid acid represented by Chemical Formula 1:
- Chemical Formula 1
- CNT—(CO—R1—X)n
- where CNT is a single walled carbon nanotube (SWNT) or a multi walled carbon nanotube, R1 is a divalent organic group, X is a univalent ionically conductive functional group, and n is an integer equal to or greater than 1.
Dependencies are inferred from the claim text.