An in situ polymerized electrolyte layer via frustrated Lewis pairs enables aqueous Zn metal batteries with an ultrahigh accumulated capacity of 12 A h cm−2†
Yutong Xia, Gege Wang, Jing Wu, Xiaowei Chi and Yu Liu
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引用次数: 0
Abstract
Aqueous zinc metal batteries (AZMBs) have garnered significant attention owing to the inherent safety of aqueous electrolytes and the zinc anode's high theoretical specific capacity (820 mA h g−1). However, interfacial instability arising from rampant zinc dendrite growth and parasitic side reactions at the electrolyte/anode interface critically hinders practical implementation. Herein, we report an in situ solid electrolyte interphase (SEI) engineering strategy via frustrated Lewis pair (FLP)-mediated polymerization of 2-acrylamido-2-methylpropane sulfonic acid (AMPS), where FLP catalysis is achieved through synergistic interactions between metallic zinc and Zn2+ cations at the electrolyte/anode interface. In contrast to conventional electrolyte additives that rely on physical adsorption or chemical passivation, the polymerized AMPS (PAMPS) establishes a dual-functional interface: (i) rapid Zn2+ ion transport channels through sulfonic acid groups, and (ii) robust chemical bonding with zinc via acrylamide moieties. This unique architecture enables simultaneous regulation of Zn2+ flux homogeneity and interfacial stabilization. Accordingly, Zn‖Zn symmetric cells with the AMPS-containing electrolyte show stable cycling for 6500 h at 1 mA cm−2. Notably, under extreme conditions (10 mA cm−2, 10 mA h cm−2), the PAMPS-enabled anode achieves a coulombic efficiency of 99.7% and an unprecedented cumulative areal capacity of 12 A h cm−2—a fourfold improvement over state-of-the-art benchmarks. Additionally, the MnO2‖Zn full cells with the AMPS-containing electrolyte exhibit a high specific capacity of 300 mA h g−1 at 500 mA g−1 and long cycling stability of 10 000 cycles at 1.58 A g−1. This work offers a facile, economical and effective approach for designing a high-performance aqueous zinc metal battery for practical applications.
由于水电解质的固有安全性和锌阳极的高理论比容量(820 mA h g−1),水锌金属电池(azmb)引起了人们的广泛关注。然而,由锌枝晶生长和电解质/阳极界面寄生副反应引起的界面不稳定性严重阻碍了实际实施。在此,我们报道了一种原位固体电解质界面(SEI)工程策略,通过挫折刘易斯对(FLP)介导的2-丙烯酰胺-2-甲基丙烷磺酸(AMPS)聚合,其中FLP催化是通过金属锌和Zn2+阳离子在电解质/阳极界面上的协同相互作用实现的。与依赖物理吸附或化学钝化的传统电解质添加剂不同,聚合后的AMPS (PAMPS)建立了双功能界面:(i)通过磺酸基团快速传输Zn2+离子通道;(ii)通过丙烯酰胺基团与锌形成牢固的化学键。这种独特的结构可以同时调节Zn2+的通量均匀性和界面稳定性。因此,锌‖锌对称电池与amps -含电解质显示稳定循环6500小时,在1毫安厘米−2。值得注意的是,在极端条件下(10 mA cm - 2, 10 mA h cm - 2), pamps阳极的库仑效率达到99.7%,累积面积容量达到前所未有的12 a h cm - 2,比最先进的基准提高了四倍。此外,含amps电解质的MnO2‖Zn全电池在500 mA g−1时具有300 mA h g−1的高比容量,在1.58 a g−1时具有10,000次循环的长循环稳定性。本研究为实际应用的高性能锌金属水电池的设计提供了一种简便、经济、有效的方法。
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.