Release time:2024-12-23  Hits:

• Key Words:PERFORMANCE; FABRICATION; NANOTUBES; DESIGN
• Abstract:Capacitive deionization (CDI) process is always limited by its insufficient salt adsorption ability, low efficiency in utilizing charges and severe anodic corrosion. Developing graphene-based CDI electrodes with optimal property and long-term reliability is urgently needed. In this study, we reported an innovative nitrogen-doped porous graphene structure (NPGS) that exhibits exceptional electrosorption capacity and stability. The three-dimensional porous architecture of NPGS mitigates graphene agglomeration, while providing an expansive surface area (507.81 m2 g-1) that promotes more electrochemically active sites. Nitrogen doping enhances electrical conductivity and reduces charge transfer resistance, thereby consequently boosting the specific capacitance and electrosorption kinetics. The optimum nitrogen doping ratio is about 6.5 at%. NPGS displays outstanding salt adsorption capacity of 45.04 mg g-1 alongside an optimal rate of 3.0 mg g-1 min-1 in NaCl solution with the initial concentration of 500 mg l- 1 at 1.4 V, in addition to remarkable long-term stability with almost no capacity degradation over 500 desalination cycles.
• Volume:19
• Issue:1
• Translation or Not:no