A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Patterned separator membranes with pillar surface microstructures for improved battery performance
In order to improve battery performance by tuning battery separator membranes, this work reports on porous poly(vinylidene fluoride-co-trifluoroethylene) - P(VDF-TrFE)- membranes with surface pillar microstructures. Separators with tailored pillar diameter, height and bulk thickness were fabricated by template patterning and computer simulations, allowing to evaluate the effect of the pillar microstructure characteristics on battery performance. It is shown that the different pillar microstructures of the separators affect the uptake value (150–325%), ionic conductivity value (0.8–1.6 mS·cm−1) and discharge capacity of the lithium ion batteries (LIB) when compared with the separator without pillars. The experimental charge-discharge behavior demonstrates that the pillar parameters affect battery performance and the best microstructure leading to 80 mAh·g−1 at 2C. Battery performance can be thus optimized by adjusting pillar diameter, height and bulk thickness of the separators keeping its volume constant, as demonstrated also by the simulation results. The parameter with most influence in battery performance is the bulk thickness of the separator, allowing to obtain a maximum discharge capacity value of 117.8 mAh·g−1 at 90C for a thickness of 0.01 mm. Thus, this work shows that the optimization of the pillar microstructure of the separator membranes allows increasing the capacity towards a new generation of high-performance LIBs. ; The authors thank the FCT (Fundacao para a Ciencia e Tecnologia) for financial support under the framework of Strategic Funding grants UID/FIS/04650/2020, UID/EEA/04436/2020 and UID/QUI/0686/2020 and under projects POCI-01-0145-FEDER-028157, PTDC/FIS-MAC/28157/2017 funded by national funds through FCT and by the ERDF through the COMPETE2020 -Programa Operacional Competitividade e Internacionalizacao (POCI). The authors also thank the FCT for financial support under grants SFRH/BPD/112547/2015 (C.M.C.) and SFRH/BD/141136/2018 (TMA), and FCT investigator contracts CEECIND/00833/2017 (RG). Financial support from the Basque Government Industry and Education Departments under the ELKARTEK, HAZITEK and PIBA (PIBA-2018-06) programs, respectively, are acknowledged. D. Miranda was also supported by Portuguese national funds (PIDDAC), through the FCT -Fundacao para a Ciencia e Tecnologia and FCT/MCTES under the scope of the project UIDB/05549/2020 and NORTE-01-0145-FEDER-000045.
Patterned separator membranes with pillar surface microstructures for improved battery performance
In order to improve battery performance by tuning battery separator membranes, this work reports on porous poly(vinylidene fluoride-co-trifluoroethylene) - P(VDF-TrFE)- membranes with surface pillar microstructures. Separators with tailored pillar diameter, height and bulk thickness were fabricated by template patterning and computer simulations, allowing to evaluate the effect of the pillar microstructure characteristics on battery performance. It is shown that the different pillar microstructures of the separators affect the uptake value (150–325%), ionic conductivity value (0.8–1.6 mS·cm−1) and discharge capacity of the lithium ion batteries (LIB) when compared with the separator without pillars. The experimental charge-discharge behavior demonstrates that the pillar parameters affect battery performance and the best microstructure leading to 80 mAh·g−1 at 2C. Battery performance can be thus optimized by adjusting pillar diameter, height and bulk thickness of the separators keeping its volume constant, as demonstrated also by the simulation results. The parameter with most influence in battery performance is the bulk thickness of the separator, allowing to obtain a maximum discharge capacity value of 117.8 mAh·g−1 at 90C for a thickness of 0.01 mm. Thus, this work shows that the optimization of the pillar microstructure of the separator membranes allows increasing the capacity towards a new generation of high-performance LIBs. ; The authors thank the FCT (Fundacao para a Ciencia e Tecnologia) for financial support under the framework of Strategic Funding grants UID/FIS/04650/2020, UID/EEA/04436/2020 and UID/QUI/0686/2020 and under projects POCI-01-0145-FEDER-028157, PTDC/FIS-MAC/28157/2017 funded by national funds through FCT and by the ERDF through the COMPETE2020 -Programa Operacional Competitividade e Internacionalizacao (POCI). The authors also thank the FCT for financial support under grants SFRH/BPD/112547/2015 (C.M.C.) and SFRH/BD/141136/2018 (TMA), and FCT investigator contracts CEECIND/00833/2017 (RG). Financial support from the Basque Government Industry and Education Departments under the ELKARTEK, HAZITEK and PIBA (PIBA-2018-06) programs, respectively, are acknowledged. D. Miranda was also supported by Portuguese national funds (PIDDAC), through the FCT -Fundacao para a Ciencia e Tecnologia and FCT/MCTES under the scope of the project UIDB/05549/2020 and NORTE-01-0145-FEDER-000045.
Patterned separator membranes with pillar surface microstructures for improved battery performance
Gonçalves, Renato Ferreira (author) / Miranda, D. (author) / Marques-Almeida, T. (author) / Silva, M.M. (author) / Cardoso, Vanessa Fernandes (author) / Almeida, A.M. (author) / Costa, C.M. (author) / Lanceros-Méndez, S. (author)
2021-08-15
33839349
Article (Journal)
Electronic Resource
English
DDC:
690
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