Poly(ionic liquid)s (PILs) can achieve exceptionally high carbon dioxide (CO₂) adsorption rates when their counter anions are exchanged and inorganic salt impurities are strictly eliminated.
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https://www.sflorg.com/2026/05/ms05102601.html
New Material Technology Boasts High-Performance Carbon Dioxide Absorption

how purifying Poly(ionic liquid)s and increasing counter anion size boosts CO2 adsorption by 7x, advancing carbon capture technologies.