Spacer-Engineered Ionic Channels in Covalent Organic Framework Membranes toward Ultrafast Proton Transport

Benbing Shi; Xiao Pang; Bohui Lyu; Hong Wu; Jianliang Shen; Jingyuan Guan; Xiaoyao Wang; Chunyang Fan; Li Cao; Tianhao Zhu; Yan Kong; Yawei Liu; Zhongyi Jiang

doi:10.1002/adma.202211004

Spacer-Engineered Ionic Channels in Covalent Organic Framework Membranes toward Ultrafast Proton Transport

Adv Mater. 2023 Apr;35(16):e2211004. doi: 10.1002/adma.202211004. Epub 2023 Mar 6.

Authors

Benbing Shi^{1

2}, Xiao Pang^{1

2}, Bohui Lyu^{1

2}, Hong Wu^{1

2}, Jianliang Shen^{1

2}, Jingyuan Guan^{1

2}, Xiaoyao Wang^{1

2}, Chunyang Fan^{1

2}, Li Cao^{1

2}, Tianhao Zhu^{1

2}, Yan Kong^{1

2}, Yawei Liu³, Zhongyi Jiang^{1

2

4

5}

Affiliations

¹ Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China.
² Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300192, China.
³ Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China.
⁴ Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, 350207, China.
⁵ Zhejiang Institute of Tianjin University, Ningbo, Zhejiang, 315201, China.

PMID: 36683382
DOI: 10.1002/adma.202211004

Abstract

Side-chain engineering of covalent organic frameworks as advanced ion conductors is a critical issue to be explored. Herein, ionic covalent organic framework membranes (iCOFMs) with spacer-engineered ionic channel are de novo designed and prepared. The ionic channels are decorated with side chains comprising spacers having different carbon chain lengths and the -SO₃ H groups at the end. Attributed to the synergistic contribution from the spacers and the -SO₃ H groups, the iCOFM with moderate-length spacer exhibit the highest through-plane proton conductivity of 889 mS cm^-1 at 90 °C.

Keywords: ionic covalent organic framework membrane; proton conductivity; side chains; spacer-engineered ionic channels.

Abstract

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