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Dendrite-Free and Stable Lithium Metal Anodes Enabled by an Antimony-Based Lithiophilic Interphase
Chemistry of Materials ( IF 7.2 ) Pub Date : 2019-08-26 , DOI: 10.1021/acs.chemmater.9b02356 Tao Chen 1 , Weihua Kong 1 , Peiyang Zhao 1 , Huinan Lin 1 , Yi Hu 1 , Renpeng Chen 1 , Wen Yan 1 , Zhong Jin 1, 2
Chemistry of Materials ( IF 7.2 ) Pub Date : 2019-08-26 , DOI: 10.1021/acs.chemmater.9b02356 Tao Chen 1 , Weihua Kong 1 , Peiyang Zhao 1 , Huinan Lin 1 , Yi Hu 1 , Renpeng Chen 1 , Wen Yan 1 , Zhong Jin 1, 2
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Rechargeable lithium metal batteries are of tremendous interest due to the high theoretical capacity and low reduction potential of lithium metal anode. However, the formation of unstable solid electrolyte interphase (SEI) results in lithium dendrite growth and low Coulombic efficiency during Li plating/stripping processes. Herein, we report an effective strategy to stabilize Li metal anode by in situ constructing antimony-based lithiophilic interphase on Li anode (Sb–Li) using antimony triiodide-tetrahydrofuran (THF) solution. The antimony-based lithiophilic interphase is composed of amorphous antimony and lithium compounds, revealed by in-depth X-ray photoelectron spectroscopy. The Sb–Li anode enables dendrite-free Li deposition in both ether- and ester-based electrolytes. As a result, as-assembled lithium–sulfur (Li–S) batteries with Sb–Li anode exhibit an initial capacity of 915 mAh g–1 at 1.0 C and a capacity retention >83% after 400 cycles. Operando Raman analysis confirmed that the antimony-based lithiophilic interphase can prevent parasitic side reactions, and also relieve the shuttle effect of polysulfides. Furthermore, Sb–Li|LiFePO4 cells have also realized high rate performance and stable cyclability. We expect this effective strategy for stabilizing Li metal anode will provide a valuable route to develop high-energy Li metal batteries.
中文翻译：
基于锑的Lithiophilic间相实现的无枝晶稳定锂金属阳极
由于锂金属阳极的高理论容量和低还原电势，可充电锂金属电池引起了极大的兴趣。但是，不稳定的固体电解质中间相（SEI）的形成会导致锂枝晶生长和锂电镀/剥离过程中的库仑效率低。本文中，我们报告了一种有效的策略，可以通过使用三碘化锑-四氢呋喃（THF）溶液在锂阳极（Sb–Li）上原位构建基于锑的锂亲硫中间相来稳定锂金属阳极。深入的X射线光电子能谱显示，基于锑的锂亲硫中间相由非晶态锑和锂化合物组成。Sb-Li阳极可在基于醚和基于酯的电解质中实现无枝晶状的Li沉积。因此，-1以1.0C和容量维持> 400次循环后83％。Operando Raman分析证实，基于锑的锂亲硫中间相可以防止寄生副反应，并减轻多硫化物的穿梭作用。此外，Sb–Li | LiFePO 4电池还实现了高倍率性能和稳定的循环性。我们期望这种稳定锂金属阳极的有效策略将为开发高能锂金属电池提供一条有价值的途径。
更新日期：2019-08-26
中文翻译：
基于锑的Lithiophilic间相实现的无枝晶稳定锂金属阳极
由于锂金属阳极的高理论容量和低还原电势，可充电锂金属电池引起了极大的兴趣。但是，不稳定的固体电解质中间相（SEI）的形成会导致锂枝晶生长和锂电镀/剥离过程中的库仑效率低。本文中，我们报告了一种有效的策略，可以通过使用三碘化锑-四氢呋喃（THF）溶液在锂阳极（Sb–Li）上原位构建基于锑的锂亲硫中间相来稳定锂金属阳极。深入的X射线光电子能谱显示，基于锑的锂亲硫中间相由非晶态锑和锂化合物组成。Sb-Li阳极可在基于醚和基于酯的电解质中实现无枝晶状的Li沉积。因此，-1以1.0C和容量维持> 400次循环后83％。Operando Raman分析证实，基于锑的锂亲硫中间相可以防止寄生副反应，并减轻多硫化物的穿梭作用。此外，Sb–Li | LiFePO 4电池还实现了高倍率性能和稳定的循环性。我们期望这种稳定锂金属阳极的有效策略将为开发高能锂金属电池提供一条有价值的途径。
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