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TitlePoly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene): A new binder for conventional and printable lithium-Ion batteries
Author(s)Barbosa, João C.
Pinto, Rafael S.
Hilliou, L.
Silva, Maria M.
Costa, Carlos M.
Gonçalves, Renato
Lanceros-Méndez, S.
KeywordsPolymer binder
Cathode electrodes
3D printing
Direct ink writing
Lithium-ion batteries
Issue date2021
PublisherAmerican Chemical Society
JournalACS Applied Energy Materials
Abstract(s)The growing interest in printable batteries leads to the necessity of developing new and more efficient materials that meet the required processability and performance characteristics. In this work, a poly(vinylidene fluoride-trifluoroethylenechlorofluoroethylene) (P(VDF-TrFE-CFE)) terpolymer has been used for the first time as a polymer binder for lithium-ion battery cathodes and their electrochemical characteristics have been compared with cathodes prepared with the commonly used poly(vinylidene fluoride), P(VDF), polymer binder. The rheological analysis shows that the inks show suitable properties to be printed by direct ink writing (DIW). Printing parameters were optimized with respect to the printing cathode line distance, and it is shown that the printed cathodes allowed to achieve improved battery performance when compared with conventional doctor bladeprepared electrodes, with a maximum discharge capacity of 147 mAh·g−1 at a C/8 rate. Further, it is shown that the P(VDF-TrFECFE) terpolymer as a new polymer binder leads to improved cathode performance (90 mAh·g−1 at a 1C rate) when compared with cathodes prepared with the commercial P(VDF) binder (80 mAh·g−1 at the 1C rate) under the same preparation method. Thus, it is shown that P(VDF-TrFE-CFE) represents a suitable binder for a new generation of high-performance batteries.
AccessRestricted access (UMinho)
Appears in Collections:IPC - Artigos em revistas científicas internacionais com arbitragem

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