College of Chemistry and Chemical Engineering, Yangzhou University, 225009, Yangzhou, Jiangsu, P. R. China.
School of Electrical Engineering, Zhengzhou University, 450001, Zhengzhou, Henan, P. R. China.
ChemSusChem. 2022 Aug 5;15(15):e202200656. doi: 10.1002/cssc.202200656. Epub 2022 Jun 15.
Due to the advantages of the low cost of Zn and the safety of aqueous electrolytes, the aqueous Zn ion battery (AZIB) is expected to become the next-generation battery after lithium-ion batteries. However, the problems of Zn anode dendrite growth, self-corrosion, and passivation in AZIBs lead to short cycle life and short circuit of the battery. In this work, uniform and stable Silk II-silk fibroin (Silk II-SF) coating was prepared on the surface of Zn anode by a simple method. Experiments showed that the SF coating could prevent dendritic growth and hydrogen evolution corrosion. Therefore, symmetric cells using Silk II-SF@Zn anode achieved a cycle life over 3300 and 1500 h at current densities of 10 and 20 mA cm , respectively. Using Silk II-SF coating to protect Zn anode is a simple and effective strategy to realize dendrite-free Zn anode and long-cycle-life AZIBs.
由于锌的低成本和水系电解液的安全性优势，水系锌离子电池（AZIB）有望成为继锂离子电池之后的下一代电池。然而，AZIB 中锌阳极枝晶生长、自腐蚀和钝化等问题导致电池循环寿命短、电池短路。在这项工作中，通过一种简单的方法在锌阳极表面制备了均匀稳定的丝素 II-丝素纤维（Silk Ⅱ-SF）涂层。实验表明，SF 涂层可以防止枝晶生长和析氢腐蚀。因此，使用 Silk Ⅱ-SF@Zn 阳极的对称电池在 10 和 20 mA cm 的电流密度下分别实现了超过 3300 和 1500 h 的循环寿命。使用丝素 II-SF 涂层来保护锌阳极是实现无枝晶锌阳极和长循环寿命 AZIB 的一种简单而有效的策略。
