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Shaping Li Deposits from Wild Dendrites to Regular Crystals via the Ferroelectric Effect.
Nano Letters ( IF 9.6 ) Pub Date : 2020-09-03 , DOI: 10.1021/acs.nanolett.0c03206 Yanpeng Guo 1 , Renyan Wang 1 , Can Cui 1 , Rundi Xiong 1 , Yaqing Wei 1 , Tianyou Zhai 1 , Huiqiao Li 1
Nano Letters ( IF 9.6 ) Pub Date : 2020-09-03 , DOI: 10.1021/acs.nanolett.0c03206 Yanpeng Guo 1 , Renyan Wang 1 , Can Cui 1 , Rundi Xiong 1 , Yaqing Wei 1 , Tianyou Zhai 1 , Huiqiao Li 1
Affiliation
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Manipulating the Li plating behavior remains a challenging task toward Li-based high-energy batteries. Generally, the Li plating process is kinetically controlled by ion transport, concentration gradient, local electric field, etc. A myriad of strategies have been developed for homogenizing the kinetics; however, such kinetics-controlled Li plating nature is barely changed. Herein, a ferroelectric substrate comprised of homogeneously distributed BaTiO3 was deployed and the Li plating behavior was transferred from a kinetic-controlled to a thermodynamic-preferred mode via ferroelectric effect. Such Li deposits with uniform hexagonal and cubic shapes are highly in accord with the thermodynamic principle where the body-centered cubic Li is apt to expose more (110) facets as possible to maximally minimize its surface energy. The mechanism was later confirmed due to the spontaneous polarization of BTO particles trigged by an applied electric field. The instantly generated reverse polarized field and charged ends not only neutralized the electric field but also leveled the ion distribution at the interface.
中文翻译：
通过铁电效应将锂沉积物从野生的树枝状晶体转变为规则晶体。
对于基于锂的高能电池而言，操纵锂的电镀行为仍然是一项艰巨的任务。通常，Li电镀工艺是通过离子迁移，浓度梯度，局部电场等动力学控制的。已经开发了多种策略来使动力学均匀化。但是，这种动力学控制的Li镀层性质几乎没有改变。在此，由均匀分布的BaTiO 3构成的铁电基板通过铁电效应，使Li镀层的行为从动力学控制模式转变为热力学优选模式。这种具有均匀六边形和立方形状的Li沉积物与热力学原理高度一致，在热力学原理中，以体心为中心的立方Li倾向于尽可能多地暴露（110）个晶面，以最大程度地降低其表面能。后来证实了该机理，这是由于施加的电场触发了BTO粒子的自发极化。立即产生的反向极化场和带电端不仅中和电场，而且还使界面处的离子分布均匀。
更新日期：2020-10-15
中文翻译：
通过铁电效应将锂沉积物从野生的树枝状晶体转变为规则晶体。
对于基于锂的高能电池而言，操纵锂的电镀行为仍然是一项艰巨的任务。通常，Li电镀工艺是通过离子迁移，浓度梯度，局部电场等动力学控制的。已经开发了多种策略来使动力学均匀化。但是，这种动力学控制的Li镀层性质几乎没有改变。在此，由均匀分布的BaTiO 3构成的铁电基板通过铁电效应，使Li镀层的行为从动力学控制模式转变为热力学优选模式。这种具有均匀六边形和立方形状的Li沉积物与热力学原理高度一致，在热力学原理中，以体心为中心的立方Li倾向于尽可能多地暴露（110）个晶面，以最大程度地降低其表面能。后来证实了该机理，这是由于施加的电场触发了BTO粒子的自发极化。立即产生的反向极化场和带电端不仅中和电场，而且还使界面处的离子分布均匀。
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