Observation of Zn Dendrite Growth via Operando Digital Microscopy and Time-Lapse Tomography.
Observation of Zn Dendrite Growth via Operando Digital Microscopy and Time-Lapse Tomography.
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DOI：
10.1021/acsami.2c19895
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发表时间：
2023-03-09
影响因子：
9.5
通讯作者：
Shearing, Paul R.
中科院分区：
文献类型：
--
作者：
Du, Wenjia;Zhang, Zhenyu;Iacoviello, Francesco;Zhou, Shangwei;Owen, Rhodri E.;Jervis, Rhodri;Brett, Dan J. L.;Shearing, Paul R.
由于地球上丰富的锌材料和它们的高体积能量密度（5855 mA h cm-3），锌离子电池是锂技术之外的下一代能量存储设备的有希望的候选者之一。迄今为止，锌离子电池在充放电循环过程中形成的锌枝晶仍然阻碍着锌离子电池的实际应用。因此，在有效抑制锌枝晶生长之前，了解其形成机理是至关重要的。在这里，应用操作数字光学显微镜和原位实验室为基础的X射线计算机断层扫描（X射线CT）被证明是探测和量化的锌电沉积/溶解的形态下，多个恒电流电镀/剥离条件下，在对称锌||锌电池。与相结合的显微镜方法，我们直接观察到的动态成核和随后的生长的Zn沉积物，带电的集群/颗粒的非均质运输，并通过部分溶解的“死”Zn颗粒的演变。锌电沉积早期主要是活化作用，而随后的枝晶生长则是扩散作用。高电流不仅有利于形成尖端具有较大平均曲率的尖锐枝晶，而且还导致枝晶尖端分裂和超分支形态的产生。这种方法提供了一个直接的机会，在实验室中的金属阳极电池中的枝晶形成的特点。
The zinc-ion battery is one of the promising candidates for next-generation energy storage devices beyond lithium technology due to the earth’s abundance of Zn materials and their high volumetric energy density (5855 mA h cm–3). To date, the formation of Zn dendrites during charge–discharge cycling still hinders the practical application of zinc-ion batteries. It is, therefore, crucial to understand the formation mechanism of the zinc dendritic structure before effectively suppressing its growth. Here, the application of operando digital optical microscopy and in situ lab-based X-ray computed tomography (X-ray CT) is demonstrated to probe and quantify the morphologies of zinc electrodeposition/dissolution under multiple galvanostatic plating/stripping conditions in symmetric Zn||Zn cells. With the combined microscopy approaches, we directly observed the dynamic nucleation and subsequent growth of Zn deposits, the heterogeneous transportation of charged clusters/particles, and the evolution of ‘dead’ Zn particles via partial dissolution. Zn electrodeposition at the early stage is mainly attributed to activation, while the subsequent dendrite growth is driven by diffusion. The high current not only facilitates the formation of sharp dendrites with a larger mean curvature at their tips but also leads to dendritic tip splitting and the creation of a hyper-branching morphology. This approach offers a direct opportunity to characterize dendrite formation in batteries with a metal anode in the laboratory.
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DOI：
10.1002/advs.202002173
发表时间：
2020-11
期刊：
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
影响因子：
--
作者：
Liu X;Yang F;Xu W;Zeng Y;He J;Lu X
通讯作者：
Lu X
影响因子：
9.2
作者：
Brissot, C;Rosso, M;Lascaud, S
通讯作者：
Lascaud, S
影响因子：
16.6
作者：
Li, Weiyang;Yao, Hongbin;Cui, Yi
通讯作者：
Cui, Yi
影响因子：
19
作者：
Hao, Junnan;Li, Xiaolong;Guo, Zaiping
通讯作者：
Guo, Zaiping
影响因子：
24.2
作者：
Nitta, Naoki;Wu, Feixiang;Yushin, Gleb
通讯作者：
Yushin, Gleb