用于长寿命水系锌离子电池的无枝晶锌阳极的热杂交沸石咪唑酯骨架衍生核壳设计
Te-hybridized zeolitic imidazolate frameworks-derived core-shell design toward dendrite-free Zn anode for long-term aqueous zinc-ion batteries.
作者信息
Fu Yu-Chieh, Lin Tuan-Yue, Chen Yu-Ze
机构信息
Department of Materials Science and Engineering, National Cheng Kung University, Tainan City 70101, Taiwan.
Department of Materials Science and Engineering, National Cheng Kung University, Tainan City 70101, Taiwan; Program on Key Materials, Academy of Innovative Semiconductor and Sustainable Manufacturing, National Cheng Kung University, Tainan City 70101, Taiwan; Program on Semiconductor Packaging and Testing, Academy of Innovative Semiconductor and Sustainable Manufacturing, National Cheng Kung University, Tainan City 70101, Taiwan.
出版信息
J Colloid Interface Sci. 2023 Nov;649:471-480. doi: 10.1016/j.jcis.2023.06.141. Epub 2023 Jun 20.
HYPOTHESIS
Aqueous zinc-ion batteries (AZIBs) have received considerable attention owing to their safety, low cost, and environmental benignity. However, the side reactions of hydrogen evolution revolution and Zn dendrite growth reduce the Coulombic efficiency and life span of AZIBs. To address these issues, we designed an artificial protective layer of a Te-hybridized core-shell zeolitic imidazolate framework (ZIF).
EXPERIMENTS
A core-shell structure of ZIF-8@ZIF-67 was first developed as a protecting layer on the Zn anode. To improve the poor conductivity of ZIF and its affinity for Zn, the core-shell structure was hybridized with zincophilic Te to increase the surface area and reduce the charge-transfer resistance.
FINDINGS
By incorporating metallic Te into ZIF-8 and ZIF-67, the nucleation potential and charge-transfer resistance were significantly reduced, enhancing the ion reaction kinetics and electron migration. Benefiting from the Te-hybridized ZIF-8@ZIF-67-derived nitrogen-doped porous carbon (Te-hybridized ZIF-8@ZIF-67/NC) layer, a full cell of Zn coated with Te-hybridized ZIF-8@ZIF-67/NC//MnO exhibited an excellent rate performance of 214 mAh g at an ultrahigh current density of 10 A g and ultralong cycle life (3200 cycles) without the formation of Zn dendrites.
假设
水系锌离子电池（AZIBs）因其安全性、低成本和环境友好性而受到广泛关注。然而，析氢反应和锌枝晶生长的副反应降低了AZIBs的库仑效率和寿命。为了解决这些问题，我们设计了一种碲杂化核壳沸石咪唑酯骨架（ZIF）的人工保护层。
实验
首先制备了ZIF-8@ZIF-67核壳结构作为锌阳极上的保护层。为了改善ZIF的低导电性及其对锌的亲和力，将核壳结构与亲锌碲进行杂化，以增加表面积并降低电荷转移电阻。
发现
通过将金属碲引入ZIF-8和ZIF-67中，成核电位和电荷转移电阻显著降低，增强了离子反应动力学和电子迁移。受益于碲杂化ZIF-8@ZIF-67衍生的氮掺杂多孔碳（碲杂化ZIF-8@ZIF-67/NC）层，涂覆有碲杂化ZIF-8@ZIF-67/NC的锌//MnO全电池在10 A g的超高电流密度下表现出214 mAh g的优异倍率性能和超长循环寿命（3200次循环），且没有形成锌枝晶。
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