Potential limits of capacitive deionization and membrane capacitive deionization for water electrolysis
Journal Article
·
· Separation Science and Technology
- Georgia Inst. of Technology, Atlanta, GA (United States); Louisiana State Univ., Baton Rouge, LA (United States)
- Georgia Inst. of Technology, Atlanta, GA (United States); Tianjin Polytechnic Univ., (China); Chinese Academy of Sciences (CAS), Beijing (China)
- Chinese Academy of Sciences (CAS), Beijing (China)
- Indian Institute of Technology Gandhinagar, Gujarat (India)
- Georgia Inst. of Technology, Atlanta, GA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Georgia Inst. of Technology, Atlanta, GA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Water electrolysis can delay the operation of capacitive deionization (CDI) and membrane CDI (MCDI). Here, we investigate the overpotential limits of CDI and MCDI (OP-MCDI) for water electrolysis and desalination performance. For sodium chloride concentrations of ~28,460 ppm, MCDI with mesoporous carbon electrodes could be operated at up to 2.4 V without water electrolysis, and the salt-adsorption capacity of the OP-MCDI system at 2.4 V was about two times greater than that of the MCDI at 1.2 V. This study offers an opportunity to extend the applicability of conventional CDI and MCDI systems for desalination of low-salinity solutions.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1531237
- Journal Information:
- Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 13 Vol. 54; ISSN 0149-6395
- Publisher:
- Taylor & FrancisCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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