Pseudocapacitive Coating for Effective Capacitive Deionization
SCIE
SCOPUS
- Title
- Pseudocapacitive Coating for Effective Capacitive Deionization
- Authors
- Li, Meng; PARK, HYUNG GYU
- Date Issued
- 2018-01-24
- Publisher
- American Chemical Society
- Abstract
- Capacitive deionization (CDI) features a low-cost and energy-efficient desalination approach based on electrosorption of saline ions. To enhance the salt electrosorption capacity of CDI electrodes, we coat ion-selective pseudocapacitive layers (MnO2 and Ag) onto porous carbon electrodes (activated carbon cloth) with only minimal use of a conductive additive and a polymer binder (<1 wt % in total). Optimized pseudocapacitive electrodes result in excellent single electrode specific capacitance (>300 F/g) and great cell stability (70% retention after 500 cycles). A CDI cell out of these pseudocapacitive electrodes yields as high charge efficiency as 83% and a remarkable salt adsorption capacity up to 17.8 mg/g. Our finding of outstanding CDI performance of the pseudocapacitive electrodes with no use of costly ion-exchange membranes highlights the significant role of a pseudocapacitive layer in the electrosorption process.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/98788
- DOI
- 10.1021/acsami.7b14643
- ISSN
- 1944-8244
- Article Type
- Article
- Citation
- ACS Applied Materials and Interfaces, vol. 10, no. 3, page. 2442 - 2450, 2018-01-24
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