journal article·2022-12-05

Superprotonic Conduction of Acidified Benzimidazole-Linked Covalent Organic Framework

Jin Zhang, Ya-Ru Kong, Yangyang Liu, Hong-Bin Luo, Yang Zou, Shuang-Quan Zang, Xiao-Ming Ren

ACS Materials Letters· Volume 4· Issue 12
Publisher page

Abstract

The development of fast proton-conducting materials above 100 °C with high chemical stability is very challenging but of great significance for proton-exchange membrane fuel cells (PEMFCs). Herein, we demonstrate the first example of benzimidazole-linked COF (PBI-COF) exploited as a fast proton conductor above 100 °C toward PEMFC application. Our PBI-COF integrates the outstanding chemical stability of polybenzimidazoles (PBIs) and the ordered channel structure of COFs to provide a powerful platform to confine and stabilize H3PO4 molecules for proton transport. Upon impregnation with H3PO4, H3PO4@PBI-COF exhibits high proton conductivity (>10–1 S cm–1 above 100 °C), low water swelling, and good long-term durability that is superior to many reported proton conductors. Furthermore, PEMFC with H3PO4@PBI-COF as a solid electrolyte achieves 0.936 V open-circuit voltages and 125 mW cm–2 maximum power densities.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Covalent Organic Framework Applications · Fuel Cells and Related Materials · Metal-Organic Frameworks: Synthesis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China

Department of Chemistry and Biochemistry, California State University, Los Angeles, 5151 State University Drive, Los Angeles, California 90032-8202, United States

College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China

State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, P. R. China

Funding

Natural Science Foundation of Jiangsu Province · National Natural Science Foundation of China · Priority Academic Program Development of Jiangsu Higher Education Institutions

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