DOI: 10.1016/j.watres.2018.11.080
Scopus记录号: 2-s2.0-85059273401
论文题名: Flow-electrode capacitive deionization with highly enhanced salt removal performance utilizing high-aspect ratio functionalized carbon nanotubes
作者: Cho Y. ; Yoo C.-Y. ; Lee S.W. ; Yoon H. ; Lee K.S. ; Yang S. ; Kim D.K.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 252
结束页码: 259
语种: 英语
英文关键词: Activated carbon
; Capacitive deionization
; Desalination
; Flow electrode
; Functionalized carbon nanotube
Scopus关键词: Activated carbon
; Aspect ratio
; Carbon nanotubes
; Electrochemical electrodes
; Saline water
; Solvents
; Yarn
; Applied potentials
; Capacitive deionization
; Desalination systems
; Electrochemical analysis
; Functionalized carbon nanotubes
; Percolation networks
; Removal performance
; Saline water concentrations
; Desalination
; activated carbon
; carbon nanotube
; sodium chloride
; activated carbon
; carbon nanotube
; degradation
; desalination
; electrode
; performance assessment
; pollutant removal
; salt
; Article
; concentration (parameters)
; conductance
; desalination
; electrochemical analysis
; priority journal
; surface property
; viscosity
英文摘要: Flow-electrode-based capacitive deionization (FCDI) has attracted much attention owing to its continuous and scalable desalination process without the need for a discharging step, which is required in conventional fixed-electrode capacitive deionization. However, flow electrode slurry is poorly conductive, which restricts desalination performance, but higher carbon mass loading in the slurry could improve salt removal capacity due to enhanced connectivity. However, increased viscosity restricts higher loading of active materials. Herein, we report a significant increase in salt removal performance by introducing functionalized carbon nanotubes (FCNTs) into activated carbon (AC)-based flow electrodes, which led to the generation of conducting bridges between AC particles. The salt removal rate in the presence of 0.25 wt% FCNT with 5 wt% AC improved four-fold from that obtained with only 5 wt% AC, which is the highest value reported in the literature so far (from 1.45 to 5.72 mmol/m 2 s, at a saline water concentration of 35.0 g/L and applied potential of 1.2 V). Further, FCNTs with a high aspect ratio (∼50,000) can more effectively enhance salt removal than low-aspect ratio FCNTs (∼1300). Electrochemical analysis further confirms that the addition of FCNTs can efficiently form a connecting percolation network, thus enhancing the conductivity of the flow electrode slurry for the practical application of highly efficient desalination systems. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122053
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Energy Systems, Soonchunhyang University, Asan, 31538, South Korea; Energy Efficiency and Materials Research Division, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon, 305-343, South Korea; The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States; Jeju Global Research Center, Korea Institute of Energy Research, 200 Haemajihean-ro695-971, South Korea
Recommended Citation:
Cho Y.,Yoo C.-Y.,Lee S.W.,et al. Flow-electrode capacitive deionization with highly enhanced salt removal performance utilizing high-aspect ratio functionalized carbon nanotubes[J]. Water Research,2019-01-01