High single Zn-ion conductive porous organic conductors decorated with dense acidic groups via double post-synthetic sulfonations

Minjung Kang, Dong Won Kang, Young Jun Yun, Taehyun Kwon, Donggyu Lee, Kwang Soo Lim, Chang Seop Hong

Research output: Contribution to journalArticlepeer-review

Abstract

Solid Zn-ionic conductors are one of the important components of rechargeable aqueous Zn-ion batteries. Although ion-conductive porous materials have been intensively studied due to their effective conduction pathways through large surface areas and tunable functionalities, porous material-based Zn ion conductors have been rarely reported because the strong electrostatic bonding properties of divalent Zn2+ ions generally lead to slow diffusion rates and low conductivity. Herein, we prepared porous organic polymer (POP)-based Zn-ion conductors via multiple post-synthetic modifications. The porous conductor with a large number of Zn-ion-incorporated sites exhibited a conductivity value of 3.24×10−4 S cm−1, and a transference number of 0.94, which are the highest values among other porous materials. The long-term performance of conductivity was retained for at least one week. This work highlights the remarkable effectiveness of multiple post-synthetic modifications to achieve high Zn-ion conductivity and provides the first demonstration of a Zn-ion POP conductor.

Original languageEnglish
Article number144245
JournalChemical Engineering Journal
Volume470
DOIs
Publication statusPublished - 2023 Aug 15

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF-2021R1A2B5B03086313 and NRF-2021R1F1A1064336), the Priority Research Centers Program (NRF-2019R1A6A1A11044070).

Publisher Copyright:
© 2023 Elsevier B.V.

Keywords

  • Porous organic polymers
  • Post-synthetic modification
  • Solid electrolyte
  • Zn-ion conductivity

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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