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Polymer Nanofiber-Guided Uniform Lithium Deposition for Battery Electrodes
Nano Letters ( IF 9.6 ) Pub Date : 2015-04-09 00:00:00 , DOI: 10.1021/nl5046318 Zheng Liang , Guangyuan Zheng , Chong Liu , Nian Liu , Weiyang Li , Kai Yan , Hongbin Yao , Po-Chun Hsu , Steven Chu , Yi Cui 1
Nano Letters ( IF 9.6 ) Pub Date : 2015-04-09 00:00:00 , DOI: 10.1021/nl5046318 Zheng Liang , Guangyuan Zheng , Chong Liu , Nian Liu , Weiyang Li , Kai Yan , Hongbin Yao , Po-Chun Hsu , Steven Chu , Yi Cui 1
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Lithium metal is one of the most promising candidates as an anode material for next-generation energy storage systems due to its highest specific capacity (3860 mAh/g) and lowest redox potential of all. The uncontrolled lithium dendrite growth that causes a poor cycling performance and serious safety hazards, however, presents a significant challenge for the realization of lithium metal-based batteries. Here, we demonstrate a novel electrode design by placing a three-dimensional (3D) oxidized polyacrylonitrile nanofiber network on top of the current collector. The polymer fiber with polar surface functional groups could guide the lithium ions to form uniform lithium metal deposits confined on the polymer fiber surface and in the 3D polymer layer. We showed stable cycling of lithium metal anode with an average Coulombic efficiency of 97.4% over 120 cycles in ether-based electrolyte at a current density of 3 mA/cm2 for a total of 1 mAh/cm2 of lithium.
中文翻译：
用于电池电极的聚合物纳米纤维引导的均匀锂沉积
金属锂由于其最高的比容量（3860 mAh / g）和最低的氧化还原电位而成为下一代储能系统阳极材料中最有希望的候选者之一。然而，不受控制的锂枝晶生长会导致不良的循环性能和严重的安全隐患，这对锂金属基电池的实现提出了重大挑战。在这里，我们通过在集电器顶部放置三维（3D）氧化聚丙烯腈纳米纤维网络，展示了一种新颖的电极设计。具有极性表面官能团的聚合物纤维可以引导锂离子形成限制在聚合物纤维表面和3D聚合物层中的均匀锂金属沉积物。我们显示出锂金属阳极的稳定循环，平均库仑效率为97。2，总共1 mAh / cm 2的锂。
更新日期：2015-04-09
中文翻译：
用于电池电极的聚合物纳米纤维引导的均匀锂沉积
金属锂由于其最高的比容量（3860 mAh / g）和最低的氧化还原电位而成为下一代储能系统阳极材料中最有希望的候选者之一。然而，不受控制的锂枝晶生长会导致不良的循环性能和严重的安全隐患，这对锂金属基电池的实现提出了重大挑战。在这里，我们通过在集电器顶部放置三维（3D）氧化聚丙烯腈纳米纤维网络，展示了一种新颖的电极设计。具有极性表面官能团的聚合物纤维可以引导锂离子形成限制在聚合物纤维表面和3D聚合物层中的均匀锂金属沉积物。我们显示出锂金属阳极的稳定循环，平均库仑效率为97。2，总共1 mAh / cm 2的锂。
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