Construction of Fluorine‐ and Piperazine‐Engineered Covalent Triazine Frameworks Towards Enhanced Dual‐Ion Positive Electrode Performance

Organic positive electrodes featuring lightweight and tunable energy storage modes by molecular structure engineering have promising application prospects in dual‐ion batteries. Herein, a series of highly porous covalent triazine frameworks (CTFs) were synthesized under ionothermal conditions using...

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Bibliographic Details
Published in:	ChemSusChem Vol. 16; no. 4; pp. e202201219 - n/a
Main Authors:	Wang, Tao, Gaugler, James Anthony, Li, Meijia, Thapaliya, Bishnu Prasad, Fan, Juntian, Qiu, Liqi, Moitra, Debabrata, Kobayashi, Takeshi, Popovs, Ilja, Yang, Zhenzhen, Dai, Sheng
Format:	Journal Article
Language:	English
Published:	Germany Wiley Subscription Services, Inc 20-02-2023 ChemPubSoc Europe
Subjects:	covalent covalent triazine network dual-ion battery electrode materials Electrodes Energy storage fluorinated Fluorination Fluorine INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY Ionothermal synthesis Molecular structure Monomers organic electrode Surface area triazine network covalent triazine network ionothermal synthesis organic electrode dual-ion battery electrode materials
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Summary:	Organic positive electrodes featuring lightweight and tunable energy storage modes by molecular structure engineering have promising application prospects in dual‐ion batteries. Herein, a series of highly porous covalent triazine frameworks (CTFs) were synthesized under ionothermal conditions using fluorinated aromatic nitrile monomers containing a piperazine ring. Fluorinated monomers can result in more defects in CTFs, leading to a higher surface area up to 2515 m2 g−1 and a higher N content of 11.34 wt % compared to the products from the non‐fluorinated monomer. The high surface area and abundant redox sites of these CTFs afforded high specific capacities (up to 279 mAh g−1 at 0.1 A g−1), excellent rate performance (89 mAh g−1 at 5 A g−1), and durable cycling performance (92.3 % retention rate after 500 cycles at 2.0 A g−1) as dual‐ion positive electrodes. CTFs for the win: Highly porous covalent triazine frameworks (CTFs) with high surface areas up to 2515 m2 g−1 and abundant redox sites are synthesized under ionothermal conditions using fluorinated monomers containing a piperazine ring. These highly porous CTFs exhibit high specific capacity, impressive rate performance, and durable cycling performance as dual‐ion positive electrodes.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division AC02-07CH11358; AC05-00OR22725 IS-J-10,881
ISSN:	1864-5631 1864-564X
DOI:	10.1002/cssc.202201219