Ordered mesoporous carbon–confined ZnO nanoparticles as a stable host for dendrite-free lithium metal anode

IF 2.4 4区化学 Q3 CHEMISTRY, PHYSICAL

Ionics Pub Date : 2024-11-01 DOI:10.1007/s11581-024-05913-7

Hui Wang, Nairan Li, Wei Wang, Yingfeng Yin, Dongwei Li

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引用次数: 0

Abstract

Ordered mesoporous carbon–confined ZnO nanoparticles (OMC-ZnO) are prepared by a chelation-assisted co-assembly method. The SEM images indicate ZnO nanoparticles are embedded in the ordered mesoporous carbon. The lithiophilic ZnO served as nucleation sites that can homogenize lithium metal deposition. The ordered mesoporous carbon layers can increase the electronic conductivity and structural stability. As a result, the OMC-ZnO exhibits a significantly improved Coulombic efficiency of 98.5% over 400 cycles at 1 mA cm⁻². The OMC-ZnO/Li electrode obtained by electrodeposition delivers an outstanding cycling performance of over 1000 h and an ultralow voltage hysteresis of 14 mV in a symmetrical cell at 1 mA cm⁻² for 1 mAh cm⁻². Furthermore, the full cell paired with a LiFePO₄ cathode shows a steady Coulombic efficiency and high capacity up to 116.6 mAh g⁻¹ at 1 C after 700 cycles. This work can provide an innovative strategy to fabricate advanced hosts and solve the problem of Li metal batteries.

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有序介孔碳约束ZnO纳米颗粒作为无枝晶锂金属阳极的稳定宿主

采用螯合辅助共组装法制备了有序介孔碳约束ZnO纳米粒子（OMC-ZnO）。SEM图像表明ZnO纳米颗粒包埋在有序介孔碳中。亲锂氧化锌作为成核位点，使金属锂沉积均匀化。有序的介孔碳层可以提高电子导电性和结构稳定性。结果表明，在1 mA cm−2下，OMC-ZnO的库仑效率在400次循环中显著提高了98.5%。通过电沉积获得的OMC-ZnO/Li电极在1 mA cm - 2、1 mAh cm - 2的对称电池中具有超过1000 h的卓越循环性能和14 mV的超低电压滞后。此外，与LiFePO4阴极配对的完整电池显示出稳定的库仑效率和高容量，在1℃下循环700次后可达到116.6 mAh g−1。这项工作为先进主机的制造和锂金属电池的解决提供了一种创新策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ionics 化学-电化学

CiteScore

5.30

自引率

7.10%

发文量

427

审稿时长

2.2 months

期刊介绍： Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.