Bombyx mori silkworm cocoon separators for lithium-ion batteries with superior safety and sustainability
| Autor: | Rui F. P. Pereira, Carlos M. Costa, Mariana Fernandes, Senentxu Lanceros-Méndez, Maria Manuela Silva, Renato Ferreira Gonçalves, Verónica de Zea Bermudez |
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| Přispěvatelé: | Universidade do Minho |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
safety
Science & Technology Renewable Energy Sustainability and the Environment lithium-ion batteries Library science 02 engineering and technology Bombyx mori silkworm cocoons 010402 general chemistry 021001 nanoscience & nanotechnology sustainability 01 natural sciences 7. Clean energy 0104 chemical sciences Political science Christian ministry silk separators 0210 nano-technology General Environmental Science |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| Popis: | In the quest for solutions to enhance the safety and sustainability of energy storage devices, Bombyx mori silkworm cocoons are proposed as separators for lithium (Li)‐ion batteries obtained literally from nature, and employed directly in a device. The suitability of the cocoons is evaluated in Li‐ion batteries using two different electrolytes: a mixture of lithium hexafluorophosphate (LiPF6), ethylene carbonate (EC), and dimethyl carbonate (DMC), and the ionic liquid (IL) 1‐ethyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide ([Emim]TFSI). Li/C–LiFePO4 half cells comprising the EC–DMC–LiPF6 electrolyte present excellent cycling performance, with a discharge capacity up to 86 mAh g−1 and a capacity retention up to 81% after 50 cycles at C rate. Values of 66 mAh g−1 at C/5 and 85% result with [Emim]TFSI, respectively. Separator/electrolyte interactions during battery cycling lead to a decrease of the degree of crystallinity of the cocoon silk fibers, and, in the presence of EC–DMC–LiPF6, to a concomitant increase of the concentration of free PF6− ions. The self‐extinguishing ability of silkworm cocoons represents an additional benefit to batteries, providing fire risk reduction or even suppression. This bio‐inspired work paves the way toward the fabrication of environmentally friendlier separators for next‐generation sustainable and safer Li‐ion batteries. R.F.P.P. and R.G. contributed equally to this work. This work was supported by National funds by Foundation for Science and Technology (FCT) in the framework of the Strategic Funding UID/FIS/04650/2013, UID/QUI/00686/2013 and UID/QUI/00686/2016. The authors thank FEDER funds through the COMPETE 2020 Programme and National Funds through FCT under the projects POCI-01-0145-FEDER-028157 PTDC/CTM-ENE/5387/2014 and UID/CTM/50025/2013, PEst-OE/QUI/UI0616/2014, and grants SFRH/BPD/87759/2012 (R.F.P.P.), SFRH/BPD/112547/2015 (C.M.C.), and UniRCell project (SAICTPAC/0032/2015 and POCI-01-0145-FEDER-016422). The authors acknowledge funding by the Spanish Ministry of Economy and Competitiveness (MINECO) through the project MAT2016-76039-C4-3-R (AEI/FEDER, UE) and from the Basque Government Industry Department under the ELKARTEK and HAZITEK programs. The authors thank F. A. Almeida Paz (CICECO-Instituto de Materiais de Aveiro, Aveiro, Portugal) for recording the XRD patterns. info:eu-repo/semantics/publishedVersion |
| Databáze: | OpenAIRE |
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