Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/57350
Título: | Silk fibroin separators: A step toward lithium-ion batteries with enhanced sustainability |
Autor(es): | Pereira, R. F. P. Brito-Pereira, R. Gonçalves, Renato Ferreira Silva, Marco Pinto Costa, Carlos Miguel Silva Silva, Maria Manuela Bermudez, Veronica de Zea Lanceros-Méndez, S. |
Palavras-chave: | silk fibroin membranes beta-sheet conformations environmental issues battery separator lithium-ion batteries β-sheet conformations |
Data: | 2018 |
Editora: | American Chemical Society |
Revista: | ACS Applied Materials and Interfaces |
Citação: | Pereira, R. F. P., Brito-Pereira, R., Gonçalves, R., Silva, M. P., Costa, C. M., Silva, M. M., … Lanceros-Méndez, S. (2018, February 5). Silk Fibroin Separators: A Step Toward Lithium-Ion Batteries with Enhanced Sustainability. ACS Applied Materials & Interfaces. American Chemical Society (ACS). http://doi.org/10.1021/acsami.7b13802 |
Resumo(s): | Battery separators based on silk fibroin (SF) have been prepared aiming at improving the environmental issues of lithium-ioh, batteries. SF materials with three different morphologies were produced: membrane films (SF-F), sponges prepared by lyophilization (SF-L) and: electrospuri membranes (SF-E). The latter Materials presented a suitable porons,three-dimensional microstructure and were soaked with a I M LiPF6 electrolyte: The ionic conductivities for SF-L and SF-E were 1.00 and 0.32 mS cm(-1) at 20 degrees C, respectively. A correlation between the fraction "of beta-sheet conformations and the ionic conductivity was observed. The electrochemical performance of the SF-based materials was evaluated by incorporating them in cathodic half-cells with C-LiFePO4. The discharge capacities of SF-L and SF-E were 126 and 108 mA h g(-1), respectively, at the C/Iirate and 99 and 54 mA h g(-1), respectively, at the 2C-rate. Furthermore, the capacity retention and capacity fade of the SF-L membrane after 50 cycles at the 2C-rate were 72 and 5%, respectively. These electrochemical results show that a high percentage of beta-sheet conformations, were of prime importance to guarantee excellent cycling performance. This work demonstrates that SP-based membranes are appropriate separators for the production of environmentally friendlier lithium-ion batteries. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/57350 |
DOI: | 10.1021/acsami.7b13802 |
ISSN: | 1944-8244 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDF - FCD - Artigos/Papers (with refereeing) CDQuim - Artigos (Papers) |