<p>Molten alkali-borates are a new class of high-temperature liquid CO₂ absorbents that exhibit high capacity, fast kinetics and exceptional stability. We herein demonstrate the high working capacity and versatility of these materials through an assessment of their compatibility with system configurations involving both temperature swing and steam-based partial pressure swing regeneration, revealing the suitability of these sorbents for use in a large variety of CO₂-emitting industries. The favorable physico-chemical properties of these materials coupled to an effective and stable working capacity of 3 mmol g⁻¹ reached within 10-min cycles past 575 °C and using 15 v% CO₂ for carbon capture and pure steam for regeneration further substantiates the high potential of molten borates as alternatives to commercially available carbon capture sorbents.</p>