Enabling Low-Temperature and High-Rate Zn Metal Batteries by Activating Zn Nucleation with Single-Atomic Sites,ACS Energy Letters

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Enabling Low-Temperature and High-Rate Zn Metal Batteries by Activating Zn Nucleation with Single-Atomic Sites
ACS Energy Letters ( IF 19.3 ) Pub Date : 2022-10-20 , DOI: 10.1021/acsenergylett.2c02042
Shan Chen ₁ , Jialei Chen ₁ , Xuelong Liao ₁ , Youzeng Li ₁ , Wei Wang ₁ , Rong Huang ₁ , Tete Zhao ₁ , Shuowen Yan ₁ , Zhenhua Yan _{1,

2} , Fangyi Cheng _{1,

2} , Huan Wang _{1,

2}

Affiliation

Aqueous zinc (Zn)-ion batteries have attracted increasing attentions owing to their low cost and intrinsic safety. Nevertheless, the sluggish kinetics at subzero temperatures severely exacerbate the Zn dendrite growth, which hinders their implementation in cold environments. By virtue of high activity and maximum exposure of single atoms, Bi–N₄ moieties were fabricated to serve as Zn nucleation sites to increase Zn nucleation kinetics toward high-rate and low-temperature Zn metal batteries. Benefiting from the boosted kinetics, the Bi–N₄ species render a highly reversible and dendrite-free Zn plating/stripping behavior at 5 mA cm^–2 with an average Coulombic efficiency of 99.4% over 1600 cycles at −30 °C, as well as a prolonged life up to 600 cycles in symmetric cells. Low-temperature full cells were also demonstrated with nearly 100% capacity retention after cycling at 0.5 A g^–1 for 1400 cycles. This work shows the feasibility of single atoms in manipulating nucleation behaviors toward low-temperature metal batteries.

中文翻译：

通过激活单原子位点的 Zn 成核来实现低温和高倍率的 Zn 金属电池

水系锌（Zn）离子电池由于其低成本和本质安全性而受到越来越多的关注。然而，零下温度下缓慢的动力学严重加剧了锌枝晶的生长，这阻碍了它们在寒冷环境中的实施。凭借单原子的高活性和最大暴露量，Bi-N ₄部分被制造为用作锌成核位点，以提高锌成核动力学，从而实现高倍率和低温锌金属电池。受益于增强的动力学，Bi-N _{4物种在 5 mA cm}^-2下呈现高度可逆且无枝晶的 Zn 电镀/剥离行为-30°C 下 1600 次循环的平均库仑效率为 99.4%，对称电池的寿命延长至 600 次。低温全电池也被证明在以 0.5 A g ^–1循环 1400 次后具有近 100% 的容量保持率。这项工作表明了单原子在操纵低温金属电池的成核行为方面的可行性。

更新日期：2022-10-20

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