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Confinement of Zinc Salt in Ultrathin Heterogeneous Film to Stabilize Zinc Metal Anode
Small ( IF 13.0 ) Pub Date : 2021-06-12 , DOI: 10.1002/smll.202100722 Junya Cui 1 , Zhenhua Li 1 , Annan Xu 1 , Jianbo Li 1 , Mingfei Shao 1
Small ( IF 13.0 ) Pub Date : 2021-06-12 , DOI: 10.1002/smll.202100722 Junya Cui 1 , Zhenhua Li 1 , Annan Xu 1 , Jianbo Li 1 , Mingfei Shao 1
Affiliation
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Aqueous zinc metal batteries (AZMBs) have drawn great attention due to the high theoretical capacity, low redox potential, and abundance reserves. However, the practical application of rechargeable AZMBs are hindered by the poor reversibility of Zn metal anode, owing to easy dendrite growth and serious side reactions. Herein, the preparation of heterogeneous interfacial film with highly dispersed and confined zinc salt in a 2D channel by coassembling polyamide 6, zinc trifluoromethanesulfonate, and layered double hydroxides, which significantly suppresses the dendrite formation, H2 evolution reaction as well as O2 corrosion is reported. The as-developed Zn anodes exhibit a long cycling life up to 1450 h with low reversible deposition potential. Moreover, the assembled Zn||Mn battery delivers a high initial capacity of 321 mAh g−1 and a low capacity decay of ≈0.05% per cycle after 590 cycles, which is promising for high-performance AZMBs. A fluorescent film to realize the in situ observation of the Zn anode during cycling, which provides a new chance for visual observation of the working state of the Zn interface, is also assembled.
中文翻译：
锌盐在超薄异质膜中的限制以稳定锌金属阳极
水系锌金属电池（AZMBs）由于理论容量高、氧化还原电位低和储量丰富而备受关注。然而，由于锌金属负极的可逆性差，容易枝晶生长和严重的副反应，阻碍了可充电AZMBs的实际应用。在此，通过共组装聚酰胺 6、三氟甲磺酸锌和层状双氢氧化物在二维通道中制备具有高度分散和限制的锌盐的异质界面膜，显着抑制了枝晶形成、H 2析出反应以及 O 2腐蚀报告。所开发的锌阳极具有长达 1450 小时的长循环寿命和低可逆沉积电位。此外，组装后的 Zn||Mn 电池具有 321 mAh g -1的高初始容量和 590 次循环后每次循环约 0.05% 的低容量衰减，这对于高性能 AZMBs 来说是有希望的。还组装了一种荧光膜，实现了循环过程中锌阳极的原位观察，为目视观察锌界面的工作状态提供了新的机会。
更新日期：2021-07-15
中文翻译：
锌盐在超薄异质膜中的限制以稳定锌金属阳极
水系锌金属电池（AZMBs）由于理论容量高、氧化还原电位低和储量丰富而备受关注。然而，由于锌金属负极的可逆性差，容易枝晶生长和严重的副反应，阻碍了可充电AZMBs的实际应用。在此，通过共组装聚酰胺 6、三氟甲磺酸锌和层状双氢氧化物在二维通道中制备具有高度分散和限制的锌盐的异质界面膜，显着抑制了枝晶形成、H 2析出反应以及 O 2腐蚀报告。所开发的锌阳极具有长达 1450 小时的长循环寿命和低可逆沉积电位。此外，组装后的 Zn||Mn 电池具有 321 mAh g -1的高初始容量和 590 次循环后每次循环约 0.05% 的低容量衰减，这对于高性能 AZMBs 来说是有希望的。还组装了一种荧光膜，实现了循环过程中锌阳极的原位观察，为目视观察锌界面的工作状态提供了新的机会。
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