Vertically Aligned Lithiophilic CuO Nanosheets on a Cu Collector to Stabilize Lithium Deposition for Lithium Metal Batteries
Vertically Aligned Lithiophilic CuO Nanosheets on a Cu Collector to Stabilize Lithium Deposition for Lithium Metal Batteries
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DOI：
10.1002/aenm.201703404
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发表时间：
2018-07
影响因子：
27.8
通讯作者：
Chen Zhang;Wei Lv;Guangmin Zhou;Zhijia Huang;Yunbo Zhang;Ruiyang Lyu;Hao Wu;Qinbai Yun;F. Ka
中科院分区：
文献类型：
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作者：
Chen Zhang;Wei Lv;Guangmin Zhou;Zhijia Huang;Yunbo Zhang;Ruiyang Lyu;Hao Wu;Qinbai Yun;F. Ka
不受控制的Dondrite生长阻碍了电池中锂金属阳极的直接使用，即使它具有所有阳极材料的能量密度最高，但可以实现均匀的锂沉积。电极表面。 Li成核和连续平滑的LI板，在通常使用的岩石含量Cu电流表面上很难实现。纳米片确保快速离子扩散并降低局部电流密度，在180个周期的高效率为94％，在1 mA cm -2的电流密度下CM-2）很容易实现，显示出一种简单但有效的方法来实现LI金属阳极稳定。
Uncontrollable dendrite growth hinders the direct use of a lithium metal anode in batteries, even though it has the highest energy density of all anode materials. Achieving uniform lithium deposition is the key to solving this problem, but it is hard to be realized on a planar electrode surface. In this study, a thin lithiophilic layer consisting of vertically aligned CuO nanosheets directly grown on a planar Cu current collector is prepared by a simple wet chemical reaction. The lithiophilic nature of the CuO nanosheets reduces the polarization of the electrode, ensuring uniform Li nucleation and continuous smooth Li plating, which is difficult to realize on the normally used lithiophobic Cu current collector surface. The integration of the grown CuO arrays and the Cu current collector guarantees good electron transfer, and moreover, the vertically aligned channels between the CuO nanosheets guarantee fast ion diffusion and reduce the local current density. As a result, a high Columbic efficiency of 94% for 180 cycles at a current density of 1 mA cm−2 and a prolonged lifespan of a symmetrical cell (700 h at 0.5 mA cm−2) can be easily achieved, showing a simple but effective way to realize Li metal‐based anode stabilization.