Silver Copper Oxide Nanowires by Electrodeposition for Stable Lithium Metal Anode in Carbonate-Based Electrolytes,ACS Sustainable Chemistry & Engineering

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Silver Copper Oxide Nanowires by Electrodeposition for Stable Lithium Metal Anode in Carbonate-Based Electrolytes
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2022-05-19 , DOI: 10.1021/acssuschemeng.2c01846
Nanbiao Pei ₁ , Jiaxiang Liu ₁ , Haoshen Ma ₁ , Zhiqiang Chen ₁ , Peng Zhang ₁ , Jinbao Zhao _{1,

2}

Affiliation

Because of uncontrolled plating and stripping behavior, infinite volume expansion, and dendrite formation, Li metal anodes have seriously restricted the practical application of lithium metal batteries (LMBs). In this study, a three-dimensional (3D) Li metal anode host composed of a copper oxide nanowires (CuO NWs) as the substrate with silver nanoparticles (Ag NPs) as the induced deposition sites was prepared (Ag@CuO NWs) by electrochemical machining technology. On the one hand, CuO NWs with a specific 3D structure obtained through an anodic oxidation process can provide enough space for Li deposition and thus would hinder the downside of volume change. On the other hand, Ag NPs, which are evenly distributed on the substrate by electrodeposition method can significantly reduce the nucleation overpotential and induce uniform Li deposition in this whole 3D structure. As a result, Ag@CuO NWs could maintain a capacity retention of 85.6% for 200 cycles at a 1 C rate in carbonate-based electrolytes. This work proposes a strategy that can effectively regulate the Li metal deposition behavior by means of anodic oxidation and electrodeposition.

中文翻译：

电沉积银氧化铜纳米线用于碳酸盐基电解质中的稳定锂金属阳极

由于不受控制的电镀和剥离行为、无限的体积膨胀和枝晶的形成，锂金属负极严重限制了锂金属电池（LMB）的实际应用。在这项研究中，通过电化学方法制备了由氧化铜纳米线 (CuO NWs) 和银纳米粒子 (Ag NPs) 作为诱导沉积位点组成的三维 (3D) Li 金属负极主体 (Ag@CuO NWs)机加工技术。一方面，通过阳极氧化工艺获得的具有特定 3D 结构的 CuO 纳米线可以为锂沉积提供足够的空间，从而阻碍体积变化的不利影响。另一方面，Ag NPs，通过电沉积方法将其均匀分布在基板上可以显着降低成核过电位并在整个3D结构中诱导均匀的Li沉积。因此，Ag@CuO NWs 可以在碳酸盐基电解质中以 1 C 的速率在 200 次循环中保持 85.6% 的容量保持率。这项工作提出了一种可以通过阳极氧化和电沉积来有效调节锂金属沉积行为的策略。

更新日期：2022-05-19

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