Avoiding short circuits from zinc metal dendrites in anode by backside-plating configuration.
Avoiding short circuits from zinc metal dendrites in anode by backside-plating configuration.
复制标题
通过背面板构型避免阳极中锌金属树突的短路。
DOI：
10.1038/ncomms11801
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发表时间：
2016-06-06
影响因子：
16.6
通讯作者：
Cui Y
中科院分区：
文献类型：
--
作者：
Higashi S;Lee SW;Lee JS;Takechi K;Cui Y
便携式电源和电网规模的存储都需要结合高能量密度和低成本的电池。锌金属电池系统由于锌的低成本及其高电荷存储容量而具有吸引力。然而，在重复电镀和剥离下，锌金属阳极经历众所周知的问题，锌枝晶形成，导致内部短路。在这里，我们展示了一种背面电镀配置，它可以使锌金属电池长期循环而不会短路。我们展示了800次稳定循环的镍锌电池，具有良好的功率速率（20 mA cm−2，阳极20 C速率）。这种背面电镀方法不仅可以应用于锌金属系统，而且可以应用于遭受内部短路的其它金属基电极。 锌基水性电池化学允许有吸引力的成本和能量密度，但在电镀和内部短路期间容易形成锌枝晶。在这里，作者表明，通过仅在远离反电极的一侧电镀，可以避免内部短路。
Portable power sources and grid-scale storage both require batteries combining high energy density and low cost. Zinc metal battery systems are attractive due to the low cost of zinc and its high charge-storage capacity. However, under repeated plating and stripping, zinc metal anodes undergo a well-known problem, zinc dendrite formation, causing internal shorting. Here we show a backside-plating configuration that enables long-term cycling of zinc metal batteries without shorting. We demonstrate 800 stable cycles of nickel–zinc batteries with good power rate (20 mA cm−2, 20 C rate for our anodes). Such a backside-plating method can be applied to not only zinc metal systems but also other metal-based electrodes suffering from internal short circuits. Zinc-based aqueous battery chemistries allow for attractive cost and energy densities, but are susceptible to zinc dendrite formation during plating and internal shorting. Here, the authors show that by plating only on the side away from the counter-electrode, internal shorts can be circumvented.