Cost-effective porous-organic-polymer-based electrolyte membranes with superprotonic conductivity and low activation energy

Abstract

A sulfuric acid-impregnated porous organic polymer exhibited superprotonic conductivity of 2.35 × 10−1 S cm−1 and its mixed matrix membrane showed activation energy of 0.039 eV.

A perspective on development of fuel cell materials: Electrodes and electrolyte

“…The resulting membrane gives higher proton conductivity (0.235 S/cm at 70°C) as compared to the traditional Nafion membrane. Also, the resulting fuel cell showed excellent durability (3 weeks) at constant conductivity along with high OCV (0.921 V) and good current density (0.173 A/cm 2 ) 140 . Similarly, functionalized SiO 2 organic‐inorganic polymer membranes (SPEAK/f‐SiO 2 ) were developed by Lee and coworkers.…”

“…Such high values of thermal and mechanical stability result from decrease in interparticle gap due to increased dispersion of TiO 2 in sPBI matrix by amine functionalization 139 . Kang et al 140 recently synthesized phloroglucinol‐based porous organic polymers via postsynthetic impregnation of sulfuric acid into the pores. The resulting membrane gives higher proton conductivity (0.235 S/cm at 70°C) as compared to the traditional Nafion membrane.…”

“…Also, the resulting fuel cell showed excellent durability (3 weeks) at constant conductivity along with high OCV (0.921 V) and good current density (0.173 A/cm 2 ). 140 Similarly, functionalized SiO 2 organicinorganic polymer membranes (SPEAK/f-SiO 2 ) were developed by Lee and coworkers. The resulting membrane exhibits exhibit excellent proton conductivity value of 0.1998 S/cm at 90 C due to the presence of hydrogen bonding between well dispersed f-SiO 2 and polymer matrix.…”

“…According to the results of this study, 10 wt% sPBI/ AFT has exhibited conductivity value of (0.084 S/cm) with high mechanical strength (65.3 MPa tensile strength) at 160 C. Such high values of thermal and mechanical stability result from decrease in interparticle gap due to increased dispersion of TiO 2 in sPBI matrix by amine functionalization. 139 Kang et al 140 recently synthesized phloroglucinol-based porous organic polymers via postsynthetic impregnation of sulfuric acid into the pores.…”

Engineered Removal of Trace NH3 by Porous Organic Polymers Modified via Sequential Post‐Sulfonation and Post‐Alkylation

“…[ 23–25 ] Among POPs, it was found that phloroglucinol‐based polymers with high structural stability can be modified through postsynthetic sulfonation to introduce high‐density acidic functional groups. [ 26–28 ] This structural feature with high‐density acidic moieties prompted us to explore the POP system for NH 3 adsorption because the acidic groups strongly interact with basic NH 3 .…”