Improved performance of flow-electrode capacitive mixing through N-doping of activated carbon
- Authors
- Choi, Hyeryang; Kim, Donghyun; Kim, Dong Gyeong; Kim, Yeongseo; Park, Jeong Geun; Kim, Min-Gyu; Jung, Yeon-Gil; Yoo, Jungjoon; Baek, Jeonghun; Kang, Sanghui; Kim, Bumjin; Bang, Jun-Hwan; Lee, Dongsoo; Kim, Bong-Gu; Yang, SeungCheol
- Issue Date
- Jul-2024
- Publisher
- ELSEVIER
- Keywords
- Salinity gradient power; Capacitive mixing; Flow electrode; Nitrogen doping; Electrical conductivity
- Citation
- DESALINATION, v.581
- Journal Title
- DESALINATION
- Volume
- 581
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/91563
- DOI
- 10.1016/j.desal.2024.117591
- ISSN
- 0011-9164
1873-4464
- Abstract
- Flow electrodes, which are integral to flow -electrode capacitive mixing (F-CapMix), primarily consist of activated carbon (AC), conductive additive and an aqueous electrolyte with a salt. For the better performance of F-CapMix, the AC must have a high surface area and excellent electrical conductivity to facilitate efficient charge percolation and electron transport between the AC particles within the flow electrode. In this study, nitrogen -doped activated carbon (N -doped AC) was synthesized through a straightforward process involving the heating of a mixture of raw AC and melamine in a covered container. The resulting N -doped AC powder exhibited an average of 20 % higher electrical conductivity than raw AC powder without sacrificing the surface area (AC: 2284.7 m 2 /g vs N -doped AC: 2125.6 m 2 /g) owing to the incorporation of graphitic nitrogen and oxidized nitrogen into the raw AC surface. The surface characteristics of N -doped AC were found to be similar to those of raw AC. Electrochemical impedance spectroscopy analysis of F-CapMix utilizing N -doped AC in the flow electrode revealed reduced resistance and increased capacitance, leading to an enhancement in power density from 0.706 to 0.828 W/m 2 . Consequently, integrating N -doped AC into the flow electrode can contribute to the improved performance of F-CapMix.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - ETC > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/91563)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.