Journal
CHEMICAL ENGINEERING JOURNAL
Volume 435, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.134845
Keywords
Flow electrode Capacitive deionization; Current collector; Polyaniline; Flow-electrode sediment
Categories
Funding
- National Natural Science Foundation of China [51878090]
- Chongqing Graduate Student Research Innovation Project, China [CYB17007]
Ask authors/readers for more resources
The study presents a simple electrochemical polymerization method to construct a polyaniline-graphite (PGP) composite current collector, which significantly improves the deionization performance and long-term stability of flow-electrode capacitive deionization (FCDI).
Flow-electrode capacitive deionization (FCDI) is an efficient and low-energy ions separation technology. However, the unsatisfactory conductive connection of the circuit in graphite (GP) channel and inevitable flow electrode (FE) sediment impedes the application of FCDI. Herein, a simple electrochemical polymerization method was adopted to build a polyaniline-graphite (PGP) composite current collector. The average salt removal rate (ASRR) of PGP-FCDI was increased by 1.46 times than GP-FCDI. The ohmic resistance of PGP-FCDI was found to be 3.5 omega, which is much lower than that of GP-FCDI (12.9 omega). The high conductive capacity of polyaniline provides excess conductive sites, which contributes to enhanced charge transfer efficiency. Furthermore, the composite material changes the polarity of the graphite surface and destroys the electrostatic interaction between graphite and activated carbon. As a result, electrode sediment is reduced by 15%. In addition, the performance of PGP-FCDI remains stable after continuous deionization cycles. The new features significantly contribute to the improved deionization performance and long-term stability of FCDI.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available