Phosphonic-acid grafted hybrid inorganic-organic proton electrolyte membranes (PEMs)
First Claim
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1. A copolymer comprising the reaction product of a plurality of silicon compounds, each silicon compound including at least one silicon atom, the silicon compounds including:
- a first silicon compound including an organic chain, the organic chain having at least two carbon atoms; and
a second silicon compound including at least one acid group, the acid group being linked to a silicon atom of the second silicon compound through a linking group,wherein the linking group includes an electron withdrawing group, so as to enhance the acidity of the acid group.
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Abstract
A proton conducting polymer is formed by the copolymerization of a plurality of compounds, including a silicon compound comprising an organic chain, and a compound including at least one acid group. The polymer comprises a hybrid organic-inorganic matrix having acid groups linked through a linking group. The linking group may include one or more electron withdrawing groups. The electron withdrawing group may be a halogen.
38 Citations
44 Claims
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1. A copolymer comprising the reaction product of a plurality of silicon compounds, each silicon compound including at least one silicon atom, the silicon compounds including:
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a first silicon compound including an organic chain, the organic chain having at least two carbon atoms; and a second silicon compound including at least one acid group, the acid group being linked to a silicon atom of the second silicon compound through a linking group, wherein the linking group includes an electron withdrawing group, so as to enhance the acidity of the acid group. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A copolymer, comprising
a three-dimensional organic-inorganic hybrid matrix, including silicon atoms, oxygen atoms, and an organic chain; - and
an acid group chemically linked to the organic-inorganic hybrid matrix by a linking group, wherein the linking group further includes an electron-withdrawing group. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method of fabricating polymer electrolyte membrane, the method comprising:
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providing a first precursor including an organic chain having at least two carbon atoms, the organic chain having a first end and a second end, the first end being attached to a first hydrolyzable silicon-containing group, the second end being attached to a second hydrolyzable silicon-containing group, the organic chain including a polypropylene oxide chain; providing a second precursor, the precursor including an acid group and a first functional group; forming a copolymer by copolymerizing at least the precursor and the second precursor, the copolymerization including hydrolysis of the first and second hydrolyzable silicon-containing groups, so as to produce a hybrid inorganic-organic matrix including silicon atoms and the organic chain, the acid group being linked to the hybrid inorganic-organic matrix by a linking group; and fabricating the polymer electrolyte membrane using the hybrid inorganic-organic matrix. - View Dependent Claims (32, 33, 34, 35, 36, 37)
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38. A copolymer formed by the copolymerization of at least:
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a first silicon compound including an organic chain; a second silicon compound including a first functional group; and a third compound including a second functional group and an acid group, the copolymerization including at least partial hydrolysis of silicon-containing groups within the the first and second silicon compounds so as to form an inorganic-organic hybrid matrix containing silicon atoms, oxygen atoms, and the organic chain, the copolymerization further including reaction of the first and second functional groups so as to attach the acid group to the inorganic-organic hybrid matrix, wherein the acid group is bound to the inorganic-organic hybrid matrix through a linking group, the linking group being an aliphatic hydrocarbon group having 2 to 18 carbons, the linking group including an electron withdrawing group. - View Dependent Claims (39)
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40. A polymer comprising a hybrid inorganic-organic matrix having at least one backbone unit of the form —
- O—
Si(A,B)—
R—
Si(C,D)—
,wherein A,B,C,D each represent substituent groups, and R represents an organic chain including at least 2 carbon atoms, at least one substituent group including a linking group and a phosphonic acid group, the linking group connecting the phosphonic add group to a silicon atom, the linking group including at least 2 carbon atoms, the linking group including an electron withdrawing group. - View Dependent Claims (41, 44)
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42. A composite of a first polymer with a basic polymer, wherein the first polymer comprises a hybrid inorganic-organic matrix having at least one backbone unit of the form —
- O—
Si(A,B)—
R—
Si(C,D)—wherein A,B,C,D each represent substituent groups, and R represents an organic chain including at least 2 carbon atoms, at least one substituent group including a linking group and a phosphonic acid group, the linking group connecting the phosphonic acid group to a silicon atom, the linking group including at least 2 carbon atoms. - View Dependent Claims (43)
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Specification