摘要:
The present invention provides an electrolyte having high conductivity even under high-temperature low-humidification conditions (e.g. at a temperature of 100 to 120°C and a humidity of 20 to 50% RH) and thereby makes it possible to realize a higher performance fuel cell. The present invention is a fluoropolymer electrolyte having an equivalent weight (EW) of not less than 250 but not more than 700 and a proton conductivity of not lower than 0.10 S/cm as measured at a temperature of 110°C and a relative humidity of 50% RH and comprising a COOZ group- or SO 3 Z group-containing monomer units, wherein Z represents an alkali metal, an alkaline earth metal, hydrogen atom or NR 1 R 2 R 3 R 4 if which R 1 , R 2 , R 3 and R 4 each independently represents an alkyl group containing 1 to 3 carbon atoms or hydrogen atom.
摘要翻译:本发明提供即使在高温低湿度条件下(例如在100〜120℃的温度和20〜50%RH的湿度下)也具有高导电性的电解质,从而可以实现更高性能的燃料 细胞。 本发明是一种含氟聚合物电解质,其当量(EW)不小于250且不大于700,质子传导率为0.10S / cm以上,质量电导率为0.10S / cm,相对湿度为 50%RH,并且包含含有COOZ基团或含SO 3 Z基团的单体单元,其中Z表示碱金属,碱土金属,氢原子或NR 1 R 2 R 3 R 4,如果R 1,R 2, R 3和R 4各自独立地表示含有1〜3个碳原子的烷基或氢原子。
摘要:
The invention provides a powder that is easily redispersible in a liquid medium such as water. The powder contains a fluoropolymer. The fluoropolymer contains at least one group A selected from the group consisting of - SO 2 Y, -COOR, -SO 3 X, -SO 2 NR 1 2 , and -COOX, wherein Y is a halogen atom; R is a C1-C4 alkyl group; X is M 1/L or NR 1 4 , where M is a hydrogen atom or an L-valent metal, the L-valent metal being a metal in group 1, group 2, group 4, group 8, group 11, group 12, or group 13 of the periodic table; and R 1 s are each individually a hydrogen atom or a C1-C4 alkyl group. The powder exhibits a dispersion of 50% or higher. The dispersion is calculated by filtering a composition obtainable by mixing the powder with water through a mesh having an opening of 20 µm.
摘要:
An object of the present invention is to provide methods for preparing a fluoropolymer aqueous dispersion that allow efficient removal of iron ions from fluoropolymer aqueous dispersions, and purified fluoropolymer aqueous dispersions. The present invention relates to a method for preparing a fluoropolymer aqueous dispersion, including: step (A) of preparing a fluoropolymer aqueous dispersion comprising a fluoropolymer having at least one selected from the group consisting of - SO 2 Y and -COOR (wherein Y is a halogen, and R is a C1 to C4 alkyl) by emulsion polymerization; step (B) of heating the fluoropolymer aqueous dispersion to 50°C or higher; and step (C) of contacting the fluoropolymer aqueous dispersion with an ion exchange resin for cation exchange after step (B), thereby providing a purified fluoropolymer aqueous dispersion, the fluoropolymer aqueous dispersion being adjusted to pH 7 or lower from the end of the polymerization in step (A) to the end of step (C).