Article
  • Ion-Exchange Functional Group-Containing Poly(ether ether ketone)s: Preparation and Use as Binder in Fabrication of Carbon Electrodes to Improve Capacitive Deionization Efficiency

  • Da-Seul Choi, Ye-Chan Lee, Oneeb ul Haq, Jae-Hwan Choi*,† , and Youn-Sik Lee†

  • Division of Chemical Engineering, Jeonbuk National University, 567 Baekje-Daero, Deokjin-gu, Jeonju, Jeonbuk 54896, Korea
    *Department of Chemical Engineering, Kongju National University, 1223-24, Cheonan-daero, Seobuk-gu, Cheonan, Chungnam 31080, Korea

  • 이온교환 작용기를 갖는 Poly(ether ether ketone): 제조 및 축전식 탈염 효율을 향상시키기 위한 탄소전극 바인더로서의 활용

  • 최다슬 · 이예찬 · Oneeb ul Haq · 최재환*,† · 이연식†

  • 전북대학교 화학공학부, *공주대학교 화학공학과

  • Reproduction, stored in a retrieval system, or transmitted in any form of any part of this publication is permitted only by written permission from the Polymer Society of Korea.

Abstract

In order to develop polymer binder for use in the fabrication of activated carbon (AC) for capacitive deionization (CDI), we prepared quaternary ammonium group-bearing poly(ether ether ketone) (PEEK) and SO3H-bearing PEEK, and used them as binder in the preparation of AC electrodes. A CDI cell assembled using the electrodes (feed concentration: 500 ppm NaCl, flow rate: 20 mL/min, adsorption: 1.0 V, desorption: 0.0 V), exhibited greatly improved salt removal performance, compared to a cell assembled using the carbon electrodes fabricated from styrene-butadiene rubber as a binder (salt adsorption capacity: 10.1 vs 6.8 mg/g, charge efficiency: 79.8 vs 37.7%). The greatly improved cell performance was attributed to the ion-exchange binders that were well distributed throughout the AC electrodes, leading to selective ion adsorption onto the carbon electrodes during the adsorption steps.


본 연구에서는 4차 암모늄염기를 갖는 poly(ether ether ketone)(PEEK)와 술폰산기를 갖는 PEEK를 제조하고, 축전식 탈염(capacitive deionization, CDI) 셀에 필요한 탄소전극의 바인더로서 사용하였다. 이온교환 고분자 바인더를 사용하여 제조한 탄소전극으로 조립된 CDI 셀은(500 ppm NaCl 수용액의 투입 속도: 20 mL/min, 흡착과 탈착: 각각 1.0 V와 0.0 V), styrene-butadiene 바인더로 제조한 탄소전극에 비하여 크게 향상된 염 흡착 능(salt adsorption capacity, SAC)과 전하효율(charge efficiency, CE)을 나타냈다(SAC: 10.1 vs 6.8 mg/g, CE: 79.8 vs 37.7%). CDI 셀의 성능이 크게 향상된 주된 이유는 흡착단계에서 하전된 탄소전극에 이온들이 선택적으로 흡착하도록 하는 이온교환 고분자 바인더 때문인 것으로 이해된다.


Keywords: ion-exchange polymer, poly(ether ether ketone), polymer binder, capacitive deionization cell, carbon electrode.

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2021; 45(4): 620-627

    Published online Jul 25, 2021

  • 10.7317/pk.2021.45.4.620
  • Received on Apr 5, 2021
  • Revised on Apr 22, 2021
  • Accepted on May 4, 2021

Correspondence to

  • Jae-Hwan Choi* , and Youn-Sik Lee

  • Division of Chemical Engineering, Jeonbuk National University, 567 Baekje-Daero, Deokjin-gu, Jeonju, Jeonbuk 54896, Korea
    *Department of Chemical Engineering, Kongju National University, 1223-24, Cheonan-daero, Seobuk-gu, Cheonan, Chungnam 31080, Korea

  • E-mail: jhchoi@kongju.ac.kr, yosklear@jbnu.ac.kr