High performance Zn anodes enabled by a multifunctional biopolymeric protective layer for a dendrite-free aqueous zinc-based battery,Journal of Materials Chemistry A

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High performance Zn anodes enabled by a multifunctional biopolymeric protective layer for a dendrite-free aqueous zinc-based battery
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2023-06-15 , DOI: 10.1039/d3ta02663a
Lingzhi Kang _{1,

2} , Jiale Zheng ₂ , Huadong Yuan ₂ , Jianmin Luo ₂ , Yao Wang ₂ , Yujing Liu ₂ , Jianwei Nai ₂ , Xinyong Tao ₂

Affiliation

Rechargeable zinc-based batteries are expected to be the next generation energy storage system because of their high specific capacity, low redox potential, low cost, eco-friendliness, and abundant reserves. Nevertheless, their large-scale applicability is restricted due to water-induced side reactions, and the uneven plating/stripping of Zn on the anodes. Herein, an artificial protective layer acting as a desolvation layer and a zinc ion flux regulator is proposed for the reconstruction of the Zn/electrolyte interface and to promote the formation of an ultra-even amorphous solid–electrolyte interface (SEI) on Zn metal. As a consequence, the modified Zn anode displays a strong zincophilic property and decreasing interfacial impedance. The artificial layer obtained can inhibit the side reactions and induce the uniform deposition of zinc ions to avoid Zn dendrite formation in the charge/discharge process. With this advantage, the dendrite-free Zn anode exhibits a higher cycling stability (over 1200 h at 2 mA cm⁻²) than that of the bare Zn anode. This is also confirmed in the full Zn‖V₂O₅ battery with an ultrahigh discharge capacity after 1000 cycles.

中文翻译：

用于无枝晶水性锌基电池的多功能生物聚合物保护层实现的高性能锌阳极

可充电锌基电池具有比容量高、氧化还原电位低、成本低、环境友好、储量丰富等优点，有望成为下一代储能系统。然而，由于水引起的副反应以及锌在阳极上的不均匀沉积/剥离，它们的大规模应用受到限制。在此，提出了一种充当去溶剂化层和锌离子通量调节剂的人工保护层，用于重建锌/电解质界面，并促进在锌金属上形成超均匀非晶态固体电解质界面（SEI）。因此，改性 Zn 阳极显示出强烈的亲锌特性和降低的界面阻抗。获得的人造层可以抑制副反应并诱导锌离子的均匀沉积，以避免在充电/放电过程中形成锌枝晶。凭借这一优势，无枝晶 Zn 负极表现出更高的循环稳定性（在 2 mA cm 下超过 1200 h^-2 ) 比裸 Zn 阳极。这在 1000 次循环后具有超高放电容量的全 Zn‖V₂ O_{5电池中也得到了证实。}

更新日期：2023-06-18

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