Electrochemical Oxygen Generator With 99.9% Oxygen Purity and High Energy Efficiency

Under the growing crisis of coronavirus disease 2019 pandemic, global medical system is facing predicament an acute shortage medical-grade oxygen (O2, ? 99.5% purity). Herein, generation device manufactured that relies on electrochemical technology. The performance generator (EOG) remarkably improved to a practically applicable level, achieving long-term (>200 h), stable, and quick production (>1.5 L min?1) high purity O2 (99.9%) at energy efficiency (496 kW?1 h?1), via simultaneous optimization for intrinsic reaction mechanisms, electrocatalysts, external cell structure. EOG also presents powerful competitiveness in user experience, which finds expression portability (4.7 kg), nearly instant (<1 s), quiet working condition (<39 dB). shows great potential substitute commercial pressure swing adsorption devices, may significantly impact traditional industry.