Volume 64, Issue 28 e202506036
Research Article

Interweaving Covalent Organic Polymer Chains Into Two-Dimensional Networks: Synthesis, Single Crystal Structure, and Application for Stabilizing Lithium Metal Anode

Dr. Lizhong He

Dr. Lizhong He

Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, P.R. China

School of Materials Science & Engineering, Xi'an Polytechnic University, Xi'an, 710048 P.R. China

Both authors contributed equally to this work.

Search for more papers by this author
Tuoya Naren

Tuoya Naren

Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, P.R. China

State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083 P.R. China

Both authors contributed equally to this work.

Search for more papers by this author
Dr. Lei Zhang

Dr. Lei Zhang

Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, P.R. China

Search for more papers by this author
Dr. Fangyuan Kang

Dr. Fangyuan Kang

Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, P.R. China

Search for more papers by this author
Jinglun Yang

Jinglun Yang

Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, P.R. China

Search for more papers by this author
Zihao Chen

Zihao Chen

Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, P.R. China

Search for more papers by this author
Prof. Aimin Yu

Prof. Aimin Yu

Department of Chemistry and Biotechnology, Swinburne University of Technology, Hawthorn, VIC, 3122 Australia

Search for more papers by this author
Prof. Dong-Sheng Li

Prof. Dong-Sheng Li

College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, 443002 P.R. China

Search for more papers by this author
Prof. Libao Chen

Corresponding Author

Prof. Libao Chen

State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083 P.R. China

E-mail: [email protected], [email protected]

Search for more papers by this author
Prof. Qichun Zhang

Corresponding Author

Prof. Qichun Zhang

Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, P.R. China

Department of Chemistry, Center of Super-Diamond and Advanced Films (COSDAF) & Hong Kong Institute of Clean Energy (HKICE), City University of Hong Kong, Hong Kong SAR, 999077 P.R. China

City University of Hong Kong Shenzhen Research Institute, Shenzhen, Guangdong, 518057 P.R. China

E-mail: [email protected], [email protected]

Search for more papers by this author
First published: 05 May 2025
Citations: 1

Graphical Abstract

A woven two-dimensional (2D) covalent organic polymer network (CityU-46) was designed, fabricated, and structurally resolved through single-crystal X-ray diffraction analysis, which revealed a unique, well-defined two-over, two-under interweaving pattern at the molecular level. CityU-46, serving as an artificial organic solid-electrolyte interphase layer on the surface of Li metal anodes, demonstrated excellent electrochemical performance in practical lithium metal cells.

Abstract

Macroscopic weaving has been proven to be the most enduring and effective method for manufacturing fabrics to meet the practical needs of humanity for thousands of years. However, the construction of molecular structures with exquisite topologies and specific properties based on molecular weaving is still in its infancy. Herein, we designed and fabricated a two-dimensional (2D) woven covalent organic polymer (COP) network (named as CityU-46) driven by the dative N→B bonds between the 1,4-bis(benzodioxa-borole)benzene (BACT) and 2,5-bis(4-pyridyl)-1,3,4-thiadiazole (BPT). The complex woven topology of CityU-46 was determined using a single-crystal X-ray diffraction technique, revealing that it features a well-defined two-over and two-under interweaving pattern at the molecular level. Due to its structural merits, CityU-46 can be used as an artificial organic solid-electrolyte interphase layer on the surface of Li metal anodes, significantly improving the stability and long-term performance of lithium metal cells.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the Supporting Information of this article.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.