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Biofilm Nanofiber-Coated Separators for Dendrite-Free Lithium Metal Anode and Ultrahigh-Rate Lithium Batteries
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-08-13 00:00:00 , DOI: 10.1021/acsami.9b08656 Lu Nie , Yingfeng Li 1, 2 , Shaojie Chen , Ke Li , Yuanqi Huang , Yubo Zhu , Zhetao Sun , Jicong Zhang , Yingjie He , Mengkui Cui , Shicao Wei , Feng Qiu , Chao Zhong , Wei Liu
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-08-13 00:00:00 , DOI: 10.1021/acsami.9b08656 Lu Nie , Yingfeng Li 1, 2 , Shaojie Chen , Ke Li , Yuanqi Huang , Yubo Zhu , Zhetao Sun , Jicong Zhang , Yingjie He , Mengkui Cui , Shicao Wei , Feng Qiu , Chao Zhong , Wei Liu
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Rechargeable batteries that combine high energy density with high power density are highly demanded. However, the wide utilization of lithium metal anode is limited by the uncontrollable dendrite growth, and the conventional lithium-ion batteries (LIBs) commonly suffer from low rate capability. Here, we for the first time develop a biofilm-coated separator for high-energy and high-power batteries. It reveals that the coating of Escherichia coli protein nanofibers can improve electrolyte wettability and lithium transference number and enhance adhesion between separators and electrodes. Thus, lithium dendrite growth is impeded because of the uniform distribution of the Li-ion flux. The modified separator also enables the stable cycling of high-voltage Li|Li1.2Mn0.6Ni0.2O2 (LNMO) cells at an extremely high rate of 20 C, delivering a high specific capacity of 83.1 mA h g–1, which exceeds the conventional counterpart. In addition, the modified separator in the Li4Ti5O12|LNMO full cell also exhibits a larger capacity of 68.2 mA h g–1 at 10 C than the uncoated separator of 37.4 mA h g–1. Such remarkable performances of the modified separators arise from the conformal, adhesive, and endurable coating of biofilm nanofibers. Our work opens up a new opportunity for protein-based biomaterials in practical application of high-energy and high-power batteries.
中文翻译：
用于无树突状锂金属阳极和超高速率锂电池的生物膜纳米纤维涂层隔离器
结合高能量密度和高功率密度的可再充电电池是非常需要的。然而，锂金属阳极的广泛利用受到不可控制的枝晶生长的限制，并且常规的锂离子电池（LIB）通常遭受低倍率能力的困扰。在这里，我们首次开发了一种用于高能和大功率电池的生物膜涂层隔膜。结果表明，大肠杆菌蛋白纳米纤维的涂层可以改善电解质的润湿性和锂的转移数，并增强隔板与电极之间的附着力。因此，由于锂离子通量的均匀分布，阻碍了锂枝晶的生长。改进的隔膜还可以使高压Li | Li 1.2 Mn 0.6稳定循环Ni 0.2 O 2（LNMO）电池在20 C的极高速率下，可提供83.1 mA hg –1的高比容量，这超过了传统的容量。另外，在锂的改性分离器4的Ti 5 ö 12 | LNMO全电池也表现出68.2毫安Hg的更大容量-1在比37.4毫安汞柱的未涂覆隔板10℃ -1。改性隔板的这种卓越性能源自生物膜纳米纤维的保形，粘合和耐用涂层。我们的工作为蛋白质基生物材料在高能大功率电池的实际应用中开辟了新的机遇。
更新日期：2019-08-13
中文翻译：
用于无树突状锂金属阳极和超高速率锂电池的生物膜纳米纤维涂层隔离器
结合高能量密度和高功率密度的可再充电电池是非常需要的。然而，锂金属阳极的广泛利用受到不可控制的枝晶生长的限制，并且常规的锂离子电池（LIB）通常遭受低倍率能力的困扰。在这里，我们首次开发了一种用于高能和大功率电池的生物膜涂层隔膜。结果表明，大肠杆菌蛋白纳米纤维的涂层可以改善电解质的润湿性和锂的转移数，并增强隔板与电极之间的附着力。因此，由于锂离子通量的均匀分布，阻碍了锂枝晶的生长。改进的隔膜还可以使高压Li | Li 1.2 Mn 0.6稳定循环Ni 0.2 O 2（LNMO）电池在20 C的极高速率下，可提供83.1 mA hg –1的高比容量，这超过了传统的容量。另外，在锂的改性分离器4的Ti 5 ö 12 | LNMO全电池也表现出68.2毫安Hg的更大容量-1在比37.4毫安汞柱的未涂覆隔板10℃ -1。改性隔板的这种卓越性能源自生物膜纳米纤维的保形，粘合和耐用涂层。我们的工作为蛋白质基生物材料在高能大功率电池的实际应用中开辟了新的机遇。
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