Yunlin An, Chang Shu, Yunqing Liu, Yilong Xu, Litao Kang, Xiaoyu Zhang, Jianchao Sun, Zuju Ma, Kan Zhao, Yongfeng Huang, Feiyu Kang, Fuyi Jiang, Wenbao Liu
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引用次数: 0
Abstract
Zinc-ion batteries become a major research focus in energy storage, valued for their low cost and high safety. However, their widespread application is hindered by poor zinc anode stability caused by dendrites, side reactions, and poor performance across a wide temperature range at a strong hydrogen bond network aqueous electrolyte. In this study, we propose a strategy for the synergistic combination of a polyacrylamide hydrogel with sucrose. The experimental and theoretical results demonstrate that through the synergistic effect of the polyacrylamide hydrogel and sucrose, they regulate the solvation structure of Zn2+ and the hydrogen bond network and inhibit the interfacial side reactions caused by active water. Zinc anode corrosion and dendrite growth issues were also effectively mitigated by this synergistic effect. Consequently, the Zn//Zn-symmetric battery achieved stable cycling performance exceeding 6240 h at room temperature at 0.5 mA cm–2 and 0.5 mAh cm–2. The Zn//VO2 full battery also has good stability, maintaining stable cycle performance even at low temperatures (10,000 cycles at 1 A g–1 at 0 °C). Even at −10 °C, it has a stable cycle (Zn//Zn-symmetric battery cycle more than 3970 h). This work provides an alternative strategy for developing low-cost, wide temperature range electrolytes for aqueous zinc-ion batteries.
锌离子电池以其低成本和高安全性而受到重视,成为储能领域的研究热点。然而,由于枝晶、副反应以及在强氢键网络水溶液中宽温度范围内性能差,锌阳极稳定性差,阻碍了它们的广泛应用。在这项研究中,我们提出了一种策略,聚丙烯酰胺水凝胶与蔗糖的协同组合。实验和理论结果表明,聚丙烯酰胺水凝胶和蔗糖通过协同作用,调节Zn2+的溶剂化结构和氢键网络,抑制活性水引起的界面副反应。这种协同效应也有效地缓解了锌阳极腐蚀和枝晶生长问题。因此,在0.5 mA cm-2和0.5 mAh cm-2下,Zn//Zn对称电池在室温下获得了超过6240 h的稳定循环性能。Zn//VO2电池也具有良好的稳定性,即使在低温下(0°C, 1 A g-1, 10,000次循环)也能保持稳定的循环性能。即使在−10°C下,它也具有稳定的循环(锌/锌对称电池循环超过3970小时)。这项工作为开发低成本,宽温度范围的水性锌离子电池电解质提供了另一种策略。
期刊介绍:
ACS Nano, published monthly, serves as an international forum for comprehensive articles on nanoscience and nanotechnology research at the intersections of chemistry, biology, materials science, physics, and engineering. The journal fosters communication among scientists in these communities, facilitating collaboration, new research opportunities, and advancements through discoveries. ACS Nano covers synthesis, assembly, characterization, theory, and simulation of nanostructures, nanobiotechnology, nanofabrication, methods and tools for nanoscience and nanotechnology, and self- and directed-assembly. Alongside original research articles, it offers thorough reviews, perspectives on cutting-edge research, and discussions envisioning the future of nanoscience and nanotechnology.