Beschreibung:
<jats:p> <jats:bold>An inorganic–organic nanohybrid particle with a two‐dimensional chain structure, diphenylsiloxane‐silica (Ph<jats:sub>2</jats:sub>SiO–SiO<jats:sub>2</jats:sub>), was prepared by sol–gel process using diphenyldiethoxysilane (DPDES) and tetraethoxysilane (TEOS), and a high proton conducting polymer of poly(2‐acrylamido‐2‐methyl‐1‐propane sulfonic acid) (PAMPS) was deposited on the Ph<jats:sub>2</jats:sub>SiO–SiO<jats:sub>2</jats:sub> particles via layer‐by‐layer assembly. A flexible sheet‐like electrolyte was successfully obtained from the resulting PAMPS‐deposited particles by pressing. The proton conductivity of the sheet prepared using unmodified Ph<jats:sub>2</jats:sub>SiO–SiO<jats:sub>2</jats:sub> particles was lower than 10<jats:sup>−9</jats:sup> S/cm at 80°C. On the other hand, the PAMPS‐deposited samples showed proton conductivities ∼7 orders of magnitude higher than those of the sample prepared using unmodified particles, and their conductivity reached about 1 × 10<jats:sup>−2</jats:sup> S/cm at 80°C and 80% relative humidity. This is ascribed to the PAMPS layer being concentrated at the particle interfaces, which percolated throughout the monolithic sample.</jats:bold> </jats:p>