Yang Guo-Duo, Wang Jia-Hui, Wang Zhuo, Zhang Qi-Meng, Zhou Su-Min, Huang Xin-Yao, Yang Bai, Sun Hai-Zhu, Seferos Dwight S
Key Laboratory of Sustained and Advanced Functional Materials, College of Chemistry, Northeast Normal University, Changchun 130024, PR China.
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, PR China.
J Colloid Interface Sci. 2025 Dec 15;700(Pt 2):138499. doi: 10.1016/j.jcis.2025.138499. Epub 2025 Jul 20.
Electrolyte additives play a critical role in enhancing the performance and extending the lifespan of zinc-ion (Zn) batteries (ZIBs). However, it remains a great challenge to design intelligent additives that can autonomously regulate the electrolyte structure and realize dynamical protection for the zinc (Zn) anodes. In this study, a novel kind of smart fluorinated and nitrogen-doped carbonized polymer dots (FNCPDs) is synthesized as multifunctional additives for ZIBs. FNCPDs interact with Zn and water molecules through coordination and hydrogen bonding, thereby effectively modifying the Zn solvation structure and suppressing water activity. Especially, the co-deposited FNCPDs form a dynamic protective layer, mitigating water-induced side reactions and inducing Zn plating along the (002) plane during Zn plating. Notably, FNCPDs can detach from the Zn anode during stripping, continuing to regulate solvate Zn and limit water activity. In addition, FNCPDs promote a thin solid electrolyte interphase (SEI) formation and suppress dendrite growth during cycling. The Zn||MnO full cell with FNCPDs electrolyte maintains a high discharge capacity of 164.12 mAh g after 1200 cycles, with a capacity retention of approximately 85.65 %. This strategy highlights the significant potential of environmentally friendly, low-cost carbon dots for application in the field of energy storage.
电解质添加剂在提高锌离子（Zn）电池（ZIBs）的性能和延长其使用寿命方面起着关键作用。然而，设计能够自主调节电解质结构并实现对锌（Zn）阳极动态保护的智能添加剂仍然是一个巨大的挑战。在本研究中，合成了一种新型的智能氟化和氮掺杂碳化聚合物点（FNCPDs）作为ZIBs的多功能添加剂。FNCPDs通过配位和氢键与Zn和水分子相互作用，从而有效地改变Zn溶剂化结构并抑制水的活性。特别是，共沉积的FNCPDs形成了一个动态保护层，减轻了水诱导的副反应，并在Zn电镀过程中诱导Zn沿（002）平面电镀。值得注意的是，FNCPDs在剥离过程中可以从Zn阳极上脱离，继续调节溶剂化Zn并限制水的活性。此外，FNCPDs在循环过程中促进了薄固体电解质界面（SEI）的形成并抑制枝晶生长。具有FNCPDs电解质的Zn||MnO全电池在1200次循环后保持164.12 mAh g的高放电容量，容量保持率约为85.65%。该策略突出了环境友好、低成本的碳点在储能领域应用的巨大潜力。
