Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/50473
Título: | Preparation of poly(vinylidene fluoride) lithium-ion battery separators and their compatibilization with ionic liquid - a green solvent approach |
Autor(es): | Costa, Carlos Miguel Silva Rodrigues, Henrique Miguel Ribeiro Gören, Attila Machado, Ana V. Silva, Maria M. Lanceros-Méndez, S. |
Palavras-chave: | Green solvent Ionic liquid Lithium-ion batteries PVDF separator |
Data: | Jul-2017 |
Editora: | Wiley |
Revista: | Chemistryselect |
Resumo(s): | Battery separator membranes for lithium-ion batteries have been developed based on poly(vinylidene fluoride), PVDF, and using the “green solvent” - N,N’-dimethylpropyleneurea (DMPU). This separator presents a porous microstructure with a degree of porosity of 20% and pore size below 1 µm, showing excellent mechanical properties. Further, its ionic conductivity, tortuosity and MacMullin number values are 0.1 mS.cm-1, 4 and 82, respectively. This PVDF separator membrane was evaluated in Li/C–LiFePO4 half-cells with electrolyte solution showing good cyclability and rate capability, with a discharge value after 50 cycles of 56 mAh.g-1 at C, corresponding to 50% of the capacity retention. Its electrochemical performance soaked in ionic liquid presents a discharge capacity of 45 mAh.g -1 at C/5-rate and capacity retention of 60 %, respectively. Thus, this separator is an appropriate candidate for environmentally friendlier and safer lithium-ion batteries. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/50473 |
DOI: | 10.1002/slct.201701028 |
ISSN: | 2365-6549 |
e-ISSN: | 2365-6549 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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ChemistrySelect_DMPU.pdf Acesso restrito! | 663,11 kB | Adobe PDF | Ver/Abrir |