Multiple accessible redox-active sites in robust tetrapyrazinoporphyrazine covalent organic frameworks for high-performance potassium-ion batteries - Xu Ding; Ziwen Zhou; Aleksey E. Chufarin; Zhixin Liu; Qingmei Xu; Xiya Yang; Yucheng Jin; Ivan A. Skvortsov; Svetlana S. Ivanova; Hailong Wang; Pavel A. Stuzhin; Jianzhuang Jiang (Chemical Engineering Journal, 2025)