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Medientyp:
E-Book
Titel:
Accumulating Effect in Hollow Carbon Bowl Electrode
:
Understanding the Structure-Enhanced Volumetric Desalination Capacity and Ions Transport Kinetics in Capacitive Deionization
Beschreibung:
Capacitive deionization (CDI) is an energy-efficient and eco-friendly technology of refreshing the waste water. However, enhancing the volumetric desalination capacity and rate capability, based on rational design strategy and deep understanding of the structure-performance relationship of electrode materials, are remaining a huge challenge. In this work, the hollow carbon bowl (HCB) was prepared as advanced electrode material for CDI applications. HCB electrode exhibits a superior volumetric desalination capacity (SAC V ) of 3.6 mg cm -3 and a fast salt-removal rate with gravimetric desalination capacity (SAC G ) of 21.8 mg g -1 . Combining the experimental results and finite element simulations, we demonstrate that the obtained promising CDI performance of HCB is attributed its structural merits, where the small cavities of HCB efficiently increase the packing density of electrodes and the ultra-thin carbon shells of HCB substantially facilitate the ions transport. This work paves a way for miniaturizing future CDI devices based on developing structure-enhanced electrode with high volumetric desalination capacity and fast ions transport kinetics