Issue 19, 2021

Porous polyimide framework based on perylene and triazine for reversible potassium-ion storage

Abstract

Potassium-ion batteries have attracted considerable attention as an emerging energy-storage solution due to the abundance of potassium resources. The current development of potassium-ion batteries is, however, largely impeded by the lack of high-capacity and cyclable electrode materials. Herein, we report that porous polyimide frameworks (PIFs) based on perylene and triazine are a promising anode material for potassium-ion batteries. Thanks to the high-density electroactive imide groups and their robust molecular structure, our PIF delivers a large reversible specific capacity of ∼190 mA h g−1 at 0.2 A g−1, a good rate performance (∼115 mA h g−1 at 2 A g−1) and long cycling stability (83% capacity retention after 1000 cycles at 5 A g−1). These metrics render PIFs a highly promising anode material for potassium-ion batteries for future large-scale energy-storage applications.

Graphical abstract: Porous polyimide framework based on perylene and triazine for reversible potassium-ion storage

Supplementary files

Article information

Article type
Research Article
Submitted
09 juin 2021
Accepted
12 août 2021
First published
13 août 2021

Mater. Chem. Front., 2021,5, 7184-7190

Porous polyimide framework based on perylene and triazine for reversible potassium-ion storage

J. Wu, S. Di, W. Huang, Y. Wu, Q. Huang, X. Zhao, X. Yu, M. Zhang, H. Ye and Y. Li, Mater. Chem. Front., 2021, 5, 7184 DOI: 10.1039/D1QM00843A

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