Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/69465
Título: | Metal organic framework based PVDF separators for high rate cycling lithium-ion batteries |
Autor(es): | Valverde, Ainara Gonçalves, Renato Ferreira Silva, María M. Wuttke, Stefan Fidalgo, Arkaitz Costa, Carlos M. Vilas-Vilela, José L. Laza, José M. Arriortua, María I. Lanceros-Méndez, S. Luis, Roberto Fernández de |
Palavras-chave: | Separator membranes MOF-808 PVDF Separator Lithium-ion battery |
Data: | 2020 |
Editora: | ACS |
Revista: | ACS Applied Energy Materials |
Citação: | Valverde, A., Gonçalves, R., Silva, M. M., Wuttke, S., Fidalgo-Marijuan, A., et. al. (2020). Metal–Organic Framework Based PVDF Separators for High Rate Cycling Lithium-Ion Batteries. ACS Applied Energy Materials, 3(12), 11907-11919 |
Resumo(s): | Poly(vinylidene fluoride) (PVDF) and MOF-808-based separators for lithium-ion batteries (LIBs) have been prepared and fully characterized in terms of morphological and thermal properties, electrolyte uptake, and retention, and surface hydrophilic characteristics. The effect of PVDF/MOF-808 separators on the electrochemical performance of LIBs has been evaluated. The PVDF/MOF-808 membranes exhibit a well-defined porous structure with a uniform distribution of interconnected macro- to mesopores. The inclusion of the Zr-based MOF nanoparticles increases the porosity and surface area of the separator, enhancing the electrolyte uptake and the ionic conductivity. Finally, the presence of MOF-808 fillers improves the liquid electrolyte retention, which prevents the capacity fading at high C-rates cycling. Indeed, charge–discharge tests performed in Li/C-LiFePO4 half-cells reveal a discharge capacity of 68 mAh·.g–1 at 2C-rate for PVDF/MOF-808 membranes, in comparison with the 0 mAh·g–1 obtained for pure PVDF. The PVDF/10 wt % MOF-808 sample shows a long-term stable cycling behavior with a Coulombic efficiency close to 100%. Thus, it is shown that the composite membranes represent an improvement with respect to conventional separators for lithium ion battery applications, since they coupled the polymer meso- and macroporous structure with the well-ordered microporous system of the MOFs, which improve significantly the electrolyte affinity |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/69465 |
DOI: | 10.1021/acsaem.0c02044 |
ISSN: | 2574-0962 |
e-ISSN: | 2637-6113 |
Versão da editora: | https://pubs.acs.org/doi/abs/10.1021/acsaem.0c02044 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDQuim - Artigos (Papers) |