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首页> 外文期刊>ACS applied materials & interfaces >Silk Fibroin Separators: A Step Toward Lithium-Ion Batteries with Enhanced Sustainability
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Silk Fibroin Separators: A Step Toward Lithium-Ion Batteries with Enhanced Sustainability

机译：丝素素分离器：迈向锂离子电池的步骤，可持续性增强

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摘要

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.
机译：基于丝素蛋白（SF）的电池分离器已经准备好提高锂 - IOH，电池的环境问题。制备了具有三种不同形态的SF材料：膜膜（SF-F），通过冻干制备的海绵（SF-L）和：电梭形膜（SF-E）。后一种材料呈现出合适的孔，三维微观结构，并用I M LiPF6电解质浸泡：SF-L和SF-E的离子电导率分别为1.00和0.32ms Cm（-1），分别为20℃。观察到β-片状构象和离子电导率之间的级分之间的相关性。通过将它们掺入具有C-Lifepo4的阴极半电池中来评价SF基材料的电化学性能。SF-L和SF-L的放电容量SF-E分别在2C速率下分别在C / IIRATE和99和54 mA HG（-1）处为126和108 mA Hg（-1）。此外，容量保持和容量淡化在2C速率下50次循环后的SF-L膜分别为72和5％。这些电化学结果表明，高比例的β-薄板构象，具有重要的重要性，以保证出色的循环性能。这项工作表明sp-基于膜是生产环境更友好的锂离子电池的适当分离器。

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