Metal–Organic Framework-Derived ZnO, N Dually Doped Nanocages as an Efficient Host for Stable Li Metal Anodes,ACS Applied Materials & Interfaces

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Metal–Organic Framework-Derived ZnO, N Dually Doped Nanocages as an Efficient Host for Stable Li Metal Anodes
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-08-03 , DOI: 10.1021/acsami.3c08766
Zilong Zhuang ₁ , Fuming Zhang ₁ , Dayakar Gandla _{1,

2} , Vijaykumar V Jadhav _{1,

2} , Zhaoxi Liu ₁ , Liangsheng Hu ₃ , Fushen Lu ₃ , Daniel Q Tan _{1,

2,

4}

Affiliation

The drastic volume expansion and dendrite growth of lithium metal anodes give rise to poor electrochemical reversibility. Herein, ZnO, N dually doped nanocages (c-ZNCC) were synthesized as the host for lithium metal anodes using the zeolitic imidazolate framework-8 (ZIF-8). The synthesis is based on a two-step core@shell evolution mechanism, which could guide lithium deposition rapidly and offer a fast lithium-ion diffusion during the cycling process. Benefiting from the unique design, the as-obtained c-ZNCC can render a record short lithium infusion as low as 1.5 s, a stable lithium stripping/plating capability as long as 3000 h, and a voltage hysteresis of 95 mV when cycling at 10 mA cm^–2 to 10 mA h cm^–2. A low Tafel slope of 3.45 mA cm^–2 demonstrates the efficient charge transfer of c-ZNCC-Li, and the galvanostatic intermittent titration technique measurement shows high diffusion coefficient of c-ZNCC-Li during the charging process. In addition, the LNMO||c-ZNCC-Li cell exhibits a capacity retention as high as 93.7% at 1 C after 200 cycles. This work creates a new design for deriving nanocages with dual lithiophilic spots using a metal–organic framework and carbon cloth for favorable Li metal anodes.

中文翻译：

金属有机框架衍生的 ZnO、N 双掺杂纳米笼作为稳定锂金属阳极的有效主体

锂金属负极的剧烈体积膨胀和枝晶生长导致电化学可逆性差。在此，使用沸石咪唑酯框架-8 (ZIF-8) 合成了 ZnO、N 双掺杂纳米笼 (c-ZNCC) 作为锂金属阳极的主体。该合成基于两步核@壳演化机制，可以快速引导锂沉积并在循环过程中提供快速的锂离子扩散。得益于独特的设计，所获得的c-ZNCC可以实现低至1.5秒的短锂注入记录，长达3000小时的稳定脱锂/镀锂能力，以及在10℃循环时的电压迟滞为95mV。 mA cm ^–2至 10 mA h cm ^–2。^{3.45 mA cm –2}的低塔菲尔斜率证明了 c-ZNCC-Li 的有效电荷转移，恒电流间歇滴定技术测量显示 c-ZNCC-Li 在充电过程中具有高扩散系数。此外，LNMO||c-ZNCC-Li电池在1C下200次循环后的容量保持率高达93.7%。这项工作创造了一种新的设计，使用金属有机框架和碳布来获得具有双亲锂点的纳米笼，以获得有利的锂金属阳极。

更新日期：2023-08-03

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