Hierarchically open-porous nitrogen-incorporated carbon polyhedrons derived from metal-organic frameworks for improved CDI performance

Jiyoung Kim, Jeonghun Kim, Jung Ho Kim, Ho Seok Park

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

Capacitive deionization (CDI) is considered as a simple, robust, and environmentally favorable technology for water treatment. High performance electrode materials beyond commercial activated carbons (AC) should be developed for the practical application of CDI. Herein, we demonstrate hierarchically open-porous nitrogen-incorporated activated nanoporous carbon polyhedron (A-NCP) derived from metal-organic frameworks (MOFs) for high performance CDI electrodes. Owing to the 3D morphology with open nanoporous surface, macroporous channels by interlinked polyhedron particles, and electric conductivity by doped nitrogen, A-NCP delivers a high desalination capacity of 24.4 mg/g with a low concentration of 100 mg/mL at 1.2 V, revealing faster kinetic performance than that of commercial AC in the batch-mode CDI. Varying operating conditions such as applied voltage, concentration, and feed rate of saline water in a single-pass experiment, high salt adsorption capacity and fast ion removal of A-NCP are obtained, achieving high position of CDI Ragone plot.

Original languageEnglish
Article number122996
JournalChemical Engineering Journal
Volume382
DOIs
Publication statusPublished - 2020 Feb 15

Bibliographical note

Funding Information:
This research was supported by both the Energy Technology Development Project (ETDP) funded by the Ministry of Trade, Industry, and Energy ( 20172410100150 ) and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (no. 2017M2A2A6A01021187 & NRF-2017R1A6A3A11031355 ).

Funding Information:
This research was supported by both the Energy Technology Development Project (ETDP) funded by the Ministry of Trade, Industry, and Energy (20172410100150) and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (no. 2017M2A2A6A01021187 & NRF-2017R1A6A3A11031355).

Publisher Copyright:
© 2019 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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