Two-dimensional copper-porphyrin covalent triazine framework for lithium-ion batteries
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 <em>via</em> polycondensation of 5,15-bis(4-cyanophenyl) porphyrin (H<sub>2</sub>BCPP) and followed by post-copperization. The integration of copper-porphyrin moieties and triazine linkages provides two kinds of functional sites for outstanding Li<sup>+</sup> and PF<sub>6</sub><sup>−</sup> ions storage. Electrochemical studies reveal a high discharge capacity of 232 mA h g<sup>−1</sup> at 200 mA g<sup>−1</sup> and high mid-point voltage (2.77 V <em>vs</em>. Li<sup>+</sup>/Li), corresponding to an outstanding energy density of 601 W h kg<sup>−1</sup>. Density functional theory calculations and <em>ex-situ</em> characterizations disclose the intrinsic bipolar redox mechanism for metalloporphyrin for both PF<sub>6</sub><sup>−</sup> and Li<sup>+</sup> accommodation and p-type triazine units for PF<sub>6</sub><sup>−</sup> storage.
Authors
- Yongshu Xie (ORCID: https://orcid.org/0000-0001-8230-7599)
- Hailong Wang (ORCID: https://orcid.org/0000-0002-0138-2966)
- Zhixin Liu (ORCID: https://orcid.org/0000-0003-1638-7118)
- Ziwen Zhou (ORCID: https://orcid.org/0000-0001-5845-6762)
- Xu Ding
- Qingmei Xu (ORCID: https://orcid.org/0000-0002-6685-5082)
- Jianzhuang Jiang
Publication Details
- Journal
- Nano Research
- Published
- 2025-09-23
- DOI
- https://doi.org/10.26599/nr.2025.94908091
- Citations
- 1
- Primary Topic
- Advancements in Battery Materials
- Type
- article
- Field-Weighted Citation Impact
- 0.73
Funders
- National Natural Science Foundation of China
- Guizhou University
- University of Science and Technology Beijing