标题: Efficient high-rate brackish water desalination via solid-electrolyte-assisted flow-electrode capacitive deionization

作者: Zhang, YJ (Zhang, Yajun); Chen, WR (Chen, Wanru); Peng, C (Peng, Chuang)

来源出版物: SEPARATION AND PURIFICATION TECHNOLOGY  卷: 361  文献号: 131523  DOI: 10.1016/j.seppur.2025.131523  Published Date: 2025 JUL 19  子辑: 3  

摘要: Flow-electrode capacitive deionization (FCDI) holds promise for energy-efficient brackish water desalination. Despite the considerable research effects on flow-electrode and flow-channel structure optimization, the key kinetic indicator, the average salt removal rate (ASRR), has seen limited improvement due to the intrinsically low conductivity of brackish water. We hereby report a new solid-electrolyte-assisted FCDI device (SE-FCDI), which tackles the conductivity issue by its enhanced ion transport and reduced concentration polarization. At applied voltage of 1.0 V, SE-FCDI shows a record-high ASRR of 4.8 mu mol cm- 2 min-1 for 1 g/L saline water, which is over four times higher than conventional FCDI. Coupled with its higher current efficiency of 96 %, low energy consumption of 0.25 kWh/m3 is achieved for potable water production. The solid electrolyte strategy provides new insights into the design and optimization of FCDI for efficient high-rate brackish water desalination, which can be combined with other innovations in FCDI to further boost the overall performances of brackish water desalination.

作者关键词: FCDI; Solid electrolyte; Desalination rate; Ion exchange resin; Brackish water

KeyWords Plus: ENERGY; PERFORMANCE; MEMBRANES

地址: [Zhang, Yajun; Chen, Wanru; Peng, Chuang] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

通讯作者地址: Chen, WR; Peng, C (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

电子邮件地址: Wanru.chen@whu.edu.cn; Chuang.peng@whu.edu.cn

影响因子：8.2