Construction of Fluorine- and Piperazine-Engineered Covalent Triazine Frameworks Towards Enhanced Dual-Ion Positive Electrode Performance.
ChemSusChem
; 16(4): e202201219, 2023 Feb 20.
Article
in En
| MEDLINE
| ID: mdl-35996839
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 2515â
m2 g-1 and a higher N content of 11.34â
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 279â
mAh g-1 at 0.1â
A g-1 ), excellent rate performance (89â
mAh g-1 at 5â
A g-1 ), and durable cycling performance (92.3 % retention rate after 500 cycles at 2.0â
A g-1 ) as dual-ion positive electrodes.
Full text:
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
ChemSusChem
Journal subject:
QUIMICA
/
TOXICOLOGIA
Year:
2023
Document type:
Article
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