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Ultrastable Zinc Anodes Enabled by Anti-Dehydration Ionic Liquid Polymer Electrolyte for Aqueous Zn Batteries
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-01-12 , DOI: 10.1021/acsami.0c20241 Jiaqi Huang 1, 2 , Xiaowei Chi 1 , Yuexiu Du 1, 2 , Qiliang Qiu 1, 2 , Yu Liu 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-01-12 , DOI: 10.1021/acsami.0c20241 Jiaqi Huang 1, 2 , Xiaowei Chi 1 , Yuexiu Du 1, 2 , Qiliang Qiu 1, 2 , Yu Liu 1
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The side reaction and dendrite of a zinc anode in an aqueous electrolyte represent a huge obstacle for the development of rechargeable aqueous Zn batteries. An electrolyte with confined water is recognized to fundamentally stabilize the zinc anode. This work proposes acetamide/zinc perchlorate hexahydrate (AA/ZPH) ionic liquid (IL)-polyacrylamide (PAM) polymer electrolytes, here defined as IL-PAM. The novel Zn2+-conducting IL is able to accommodate trace water and can achieve both high conductivity (15.02 mS cm–1) and alleviation of side reactions (>90% reduction). Cross-linked PAM acts as the three-dimensional framework to suppress dendrites and obtain flexibility. As a result, the Zn anode with IL-PAM can cycle stably over 2000 h with a record highest cumulative capacity of 3000 mAh cm–2 and well-preserved morphology. Based on IL-PAM, the flexible LFP|Zn hybrid batteries can be successfully assembled and operate normally in series and parallel conditions. Moreover, the low volatility of IL and binding forces exerted by the PAM network endues IL-PAM with an anti-dehydration property. In a 50 °C unsealed environment, the weight loss of IL-PAM is about two-fifths of PAM hydrogel and an aqueous electrolyte, and the corresponding hybrid battery with IL-PAM can also prolong a 4 times longer lifespan.
中文翻译：
锌水溶液防脱水离子液体聚合物电解质实现的超稳定锌阳极
水性电解质中锌阳极的副反应和枝晶代表了可充电水性Zn电池开发的巨大障碍。公认的是，带有承压水的电解质可以从根本上稳定锌阳极。这项工作提出了乙酰胺/高氯酸锌六水合物（AA / ZPH）离子液体（IL）-聚丙烯酰胺（PAM）聚合物电解质，在此定义为IL-PAM。新型的Zn 2+导电IL能够容纳痕量水，并能实现高导电率（15.02 mS cm –1）并减轻副反应（减少90％以上）。交联的PAM充当三维框架，可抑制树突并获得柔韧性。结果，具有IL-PAM的锌阳极可以在2000 h内稳定循环，记录的最高累积容量为3000 mAh cm –2，并且形态得到了很好的保留。基于IL-PAM，柔性LFP | Zn混合电池可以成功组装并在串联和并联条件下正常运行。而且，IL的低挥发性和由PAM网络施加的结合力使IL-PAM具有抗脱水性能。在50°C的非密封环境中，IL-PAM的重量损失约为PAM水凝胶和水性电解质的五分之二，并且相应的带有IL-PAM的混合电池也可以将寿命延长4倍。
更新日期：2021-01-27
中文翻译：
锌水溶液防脱水离子液体聚合物电解质实现的超稳定锌阳极
水性电解质中锌阳极的副反应和枝晶代表了可充电水性Zn电池开发的巨大障碍。公认的是，带有承压水的电解质可以从根本上稳定锌阳极。这项工作提出了乙酰胺/高氯酸锌六水合物（AA / ZPH）离子液体（IL）-聚丙烯酰胺（PAM）聚合物电解质，在此定义为IL-PAM。新型的Zn 2+导电IL能够容纳痕量水，并能实现高导电率（15.02 mS cm –1）并减轻副反应（减少90％以上）。交联的PAM充当三维框架，可抑制树突并获得柔韧性。结果，具有IL-PAM的锌阳极可以在2000 h内稳定循环，记录的最高累积容量为3000 mAh cm –2，并且形态得到了很好的保留。基于IL-PAM，柔性LFP | Zn混合电池可以成功组装并在串联和并联条件下正常运行。而且，IL的低挥发性和由PAM网络施加的结合力使IL-PAM具有抗脱水性能。在50°C的非密封环境中，IL-PAM的重量损失约为PAM水凝胶和水性电解质的五分之二，并且相应的带有IL-PAM的混合电池也可以将寿命延长4倍。
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