Facile and scalable electrodeposition of copper current collectors for high-performance Li-metal batteries
Facile and scalable electrodeposition of copper current collectors for high-performance Li-metal batteries
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DOI：
10.1016/j.nanoen.2019.02.048
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发表时间：
2019-05
期刊：
影响因子：
17.6
通讯作者：
Xuetian Ma;Zhantao Liu;Hailong Chen
中科院分区：
文献类型：
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作者：
Xuetian Ma;Zhantao Liu;Hailong Chen
金属锂具有理论容量大、电化学电位负的特点，是高能量密度电池的理想负极材料。然而，其商业应用由于在循环期间锂的不期望的枝晶生长而停滞。在这里，我们报告了一个简单的一步电沉积过程，用于低成本，可扩展的制造铜集流体与3-D架构的多孔结构组成的互连的铜纳米粒子。沉积在该多孔集流体上的Li阳极在对称电池中表现出> 340 h的良好循环稳定性，而没有短路。当在具有液态或固态电解质的全电池中进行测试时，托管在3-D Cu集流体上的Li阳极表现出优异的循环性能，没有枝晶形成。该工艺非常简单，可大规模生产用于锂电池的无枝晶和高容量集流体，其可以很容易地结合到电池工业的卷对卷制造工艺中。
Lithium metal is a promising anode for high-energy-density batteries owing to its large theoretical capacity and highly negative electrochemical potential. However, its commercial application is stalled by the undesired dendritic growth of lithium during cycling. Here we report a facile one-step electrodeposition process for low-cost, scalable fabrication of copper current collectors with 3-D architected porous structures composed of interconnected nanoparticles of Cu. Li anode deposited onto this porous current collector exhibits good cycling stability of > 340 h in symmetric cells without short-circuit. When tested in full cells with liquid or solid-state electrolyte, the Li anode hosted on the 3-D Cu current collector demonstrates excellent cycling performance with no dendrites formation. This process is extremely simple and scalable for mass production of dendrite-free and high capacity current collector for Li-batteries, which can be easily incorporated into the roll-to-roll manufacturing processes of battery industries.