@article{Zhou2025, 
author = {Ziwen Zhou and Xu Ding and Zhixin Liu and Qingmei Xu and Hailong Wang and Yongshu Xie and Jianzhuang Jiang},
title = {Two-dimensional copper-porphyrin covalent triazine framework for lithium-ion batteries},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {11},
pages = {94908091},
keywords = {lithium-ion battery, two-dimensional (2D) covalent triazine framework, copper-porphyrin, bipolar ion storage mechanism},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94908091},
doi = {10.26599/NR.2025.94908091},
abstract = {Robust covalent organic frameworks (COFs) with abundant redox-active sites have attracted intense attention for organic cathode materials due to the ordered structure and excellent stability. Herein, a two-dimensional (2D) crystalline copper-porphyrin covalent triazine framework (CuBCPP-CTF) was synthesized via polycondensation of 5,15-bis(4-cyanophenyl) porphyrin (H2BCPP) and followed by post-copperization. The integration of copper-porphyrin moieties and triazine linkages provides two kinds of functional sites for outstanding Li+ and PF6− ions storage. Electrochemical studies reveal a high discharge capacity of 232 mAh·g−1 at 200 mA·g−1 and high mid-point voltage (2.77 V vs. Li+/Li), corresponding to an outstanding energy density of 601 Wh·kg−1. Density functional theory calculations and ex-situ characterizations disclose the intrinsic bipolar redox mechanism of metalloporphyrin for both PF6− and Li+ accommodation and p-type triazine units for PF6− storage.}
}