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Lithiated carbon cloth as a dendrite-free anode for high-performance lithium batteries
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-09-17 , DOI: 10.1039/d0se01096k Hao Cheng 1, 2, 3, 4, 5 , Shiyun Zhang 1, 2, 3, 4, 5 , Jian Mei 5, 6, 7 , Lvchao Qiu 5, 6, 7 , Peng Zhang 5, 8, 9 , Xiongwen Xu 5, 10, 11 , Jian Tu 5, 10, 11 , Jian Xie 1, 2, 3, 4, 5 , Xinbing Zhao 1, 2, 3, 4, 5
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-09-17 , DOI: 10.1039/d0se01096k Hao Cheng 1, 2, 3, 4, 5 , Shiyun Zhang 1, 2, 3, 4, 5 , Jian Mei 5, 6, 7 , Lvchao Qiu 5, 6, 7 , Peng Zhang 5, 8, 9 , Xiongwen Xu 5, 10, 11 , Jian Tu 5, 10, 11 , Jian Xie 1, 2, 3, 4, 5 , Xinbing Zhao 1, 2, 3, 4, 5
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Infinite relative volume changes and uncontrolled dendrite growth have hindered the practical application of lithium metal anodes. Using stable host materials with prestored Li provides an ideal solution to this issue. In this work, we design a flexible lithiated carbon cloth (LCC) electrode by simply infusing molten Li into carbon cloth without lithiophilic modification. The LCC electrode exhibits a dendrite-free Li plating/stripping behavior and minor volume changes during cycling due to merits of evenly distributed Li nucleation sites, uniform local current density, and rich voids in the carbon cloth. The symmetric cells with LCC electrodes show superior cycling stability and lower voltage hysteresis, sustaining a high current density up to 5 mA cm−2 and an areal capacity as high as 5 mA h cm−2. The full battery performance of a LiFePO4 cell and Li–O2 cell with LCC anodes also shows a significant improvement compared to that with bare Li anodes. After 100 cycles, the LiFePO4 cell with the LCC anode shows 83.3% capacity retention while that with bare Li only shows 34.8% capacity retention, indicating promising applications of the LCC anode in next-generation Li metal batteries.
中文翻译：
锂化碳布作为高性能锂电池的无枝晶阳极
无限的相对体积变化和不受控制的枝晶生长阻碍了锂金属阳极的实际应用。将稳定的主体材料与预存储的Li一起使用可为该问题提供理想的解决方案。在这项工作中，我们设计了一种柔性锂化碳布（LCC）电极，方法是简单地将熔融的Li注入碳布中，而无需进行亲硫改性。LCC电极由于均匀分布的Li成核位置，均匀的局部电流密度和碳布中的空隙而表现出无枝晶的Li镀层/剥离行为，并且在循环过程中体积变化较小。具有LCC电极的对称电池显示出卓越的循环稳定性和较低的电压滞后，可维持高达5 mA cm -2的高电流密度和高达5 mA h cm -2的面容量。与裸露的Li阳极相比，带有LCC阳极的LiFePO 4电池和Li–O 2电池的完整电池性能也显示出显着的提高。经过100次循环后，具有LCC阳极的LiFePO 4电池显示出83.3％的容量保持率，而具有裸露锂的LiFePO 4电池仅显示34.8％的容量保持率，表明LCC阳极在下一代Li金属电池中的应用前景广阔。
更新日期：2020-10-05
中文翻译：
锂化碳布作为高性能锂电池的无枝晶阳极
无限的相对体积变化和不受控制的枝晶生长阻碍了锂金属阳极的实际应用。将稳定的主体材料与预存储的Li一起使用可为该问题提供理想的解决方案。在这项工作中，我们设计了一种柔性锂化碳布（LCC）电极，方法是简单地将熔融的Li注入碳布中，而无需进行亲硫改性。LCC电极由于均匀分布的Li成核位置，均匀的局部电流密度和碳布中的空隙而表现出无枝晶的Li镀层/剥离行为，并且在循环过程中体积变化较小。具有LCC电极的对称电池显示出卓越的循环稳定性和较低的电压滞后，可维持高达5 mA cm -2的高电流密度和高达5 mA h cm -2的面容量。与裸露的Li阳极相比，带有LCC阳极的LiFePO 4电池和Li–O 2电池的完整电池性能也显示出显着的提高。经过100次循环后，具有LCC阳极的LiFePO 4电池显示出83.3％的容量保持率，而具有裸露锂的LiFePO 4电池仅显示34.8％的容量保持率，表明LCC阳极在下一代Li金属电池中的应用前景广阔。
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