Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2011-08-09
2011-08-09
Mulcahy, Peter D. (Department: 1796)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C429S006000, C429S307000, C210S500270, C521S027000, C528S482000
Reexamination Certificate
active
07993767
ABSTRACT:
The present invention provides an inexpensive solid-state polymer electrolyte membrane to be used in a solid-state polymer electrolyte fuel cell, which can be manufactured by using inexpensive raw materials through a simpler chemical synthesis process, achieves good heat resistance and demonstrates superior proton conductivity at low humidity. A primary constituent of the solid-state electrolyte polymer film to be used in a solid-state polymer electrolyte fuel cell according to the present invention is a hyperbranched polymer having an acidic functional group such as sulfonic acid disposed at the terminal of a side chain thereof. The hyperbranched polymer may be, for instance, poly[(bis(oligo-ethylene glycol) benzoate)].
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Aihara Yuichi
Itoh Takahito
Christie Parker & Hale LLP
Hu Henry
Mulcahy Peter D.
Samsung SDI & Co., Ltd.
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