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Cationic Surfactant-Type Electrolyte Additive Enables Three-Dimensional Dendrite-Free Zinc Anode for Stable Zinc-Ion Batteries
ACS Energy Letters ( IF 19.3 ) Pub Date : 2020-09-01 , DOI: 10.1021/acsenergylett.0c01792 Aruuhan Bayaguud 1 , Xiao Luo 1 , Yanpeng Fu 2 , Changbao Zhu 1
ACS Energy Letters ( IF 19.3 ) Pub Date : 2020-09-01 , DOI: 10.1021/acsenergylett.0c01792 Aruuhan Bayaguud 1 , Xiao Luo 1 , Yanpeng Fu 2 , Changbao Zhu 1
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Zn metal has been considered as a promising anode material for rechargeable aqueous metal-ion batteries. However, the propensity of dendrite growth during plating restricts its practical applications. Herein we propose an effective, low-cost, and nontoxic electrolyte additive, tetrabutylammonium sulfate (TBA2SO4), as the first example of a cationic surfactant-type electrolyte additive in Zn-ion batteries, which can induce the uniform Zn deposition in both electrode preparation and the battery charge/discharge process. Electrochemical characterizations, in situ optical microscopy observation, along with density functional theory (DFT) calculations reveal the unique zincophobic repulsion mechanism, which results in the minimum addition amount of 0.029 g L–1 compared with other reported additives (at least 1g L–1), demonstrating the great potential for practical application. Excellent cycling performance with dendrite-free morphology at different current densities and discharge depths is achieved for both the symmetric cell and the full cell (coupled to α-MnO2) using the as-prepared 3D Zn anode and the proposed additives.
中文翻译：
阳离子表面活性剂型电解质添加剂可为稳定的锌离子电池提供三维无树突状锌阳极
锌金属被认为是可再充电的水性金属离子电池的有希望的阳极材料。但是，电镀期间枝晶生长的趋势限制了其实际应用。本文中，我们提出了一种有效，低成本且无毒的电解质添加剂硫酸四丁铵硫酸盐（TBA 2 SO 4），作为锌离子电池中阳离子表面活性剂型电解质添加剂的第一个例子，它可以诱导锌中均匀的Zn沉积。电极准备和电池充电/放电过程。电化学表征，原位光学显微镜观察以及密度泛函理论（DFT）计算揭示了独特的疏锌排斥机制，其最小添加量为0.029 g L –1与其他报告的添加剂（至少1g L –1）相比，证明了其实际应用的巨大潜力。与自由枝形态优异的循环性能在不同的电流密度和放电深度为对称小区和全电池（耦合到α-MnO的既实现2使用所制备的3D锌阳极）和所提出的添加剂。
更新日期：2020-09-11
中文翻译：
阳离子表面活性剂型电解质添加剂可为稳定的锌离子电池提供三维无树突状锌阳极
锌金属被认为是可再充电的水性金属离子电池的有希望的阳极材料。但是，电镀期间枝晶生长的趋势限制了其实际应用。本文中，我们提出了一种有效，低成本且无毒的电解质添加剂硫酸四丁铵硫酸盐（TBA 2 SO 4），作为锌离子电池中阳离子表面活性剂型电解质添加剂的第一个例子，它可以诱导锌中均匀的Zn沉积。电极准备和电池充电/放电过程。电化学表征，原位光学显微镜观察以及密度泛函理论（DFT）计算揭示了独特的疏锌排斥机制，其最小添加量为0.029 g L –1与其他报告的添加剂（至少1g L –1）相比，证明了其实际应用的巨大潜力。与自由枝形态优异的循环性能在不同的电流密度和放电深度为对称小区和全电池（耦合到α-MnO的既实现2使用所制备的3D锌阳极）和所提出的添加剂。
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