Wang Qing

Dr. Wang Qing’s lab at NUS pioneers an innovative technology based on a startling new concept for large-scale high-density energy storage.

In the past few years, the NUS team has extensively investigated redox targeting-based flow batteries of different battery chemistries and successfully made prototypes of redox flow lithium-ion battery full cell, condensed-phase aqueous redox flow battery (CARB), as well as redox-flow solar rechargeable battery, etc. with the support of an EIRP project, the team developed a 10 kW/50 kWh CARB battery system, as a high-energy density, low-cost and thermally stable replacement to the conventional VFB.

Besides energy storage, the team also developed a technologically innovative and commercially viable approach for the recycling of spent LIB materials. It operates upon a regenerative flow cell through close-loop redox-targeting reactions, so that it has reduced chemical consumption and minimal environmental impact. As demonstrated with LiFePO4, by virtue of the new process, high purity LiOH (99.90%) and FePO4 (99.97%) have been obtained from used LiFePO4 during which chemicals consumption is drastically minimized, and secondary pollutions are entirely eliminated.