State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China.
School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, P. R. China.
ACS Appl Mater Interfaces. 2023 Jul 12;15(27):32496-32505. doi: 10.1021/acsami.3c06907. Epub 2023 Jun 27.
The uncontrolled growth of dendrites and serious side reactions, such as hydrogen evolution and corrosion, significantly hinder the industrial application and development of aqueous zinc-ion batteries (ZIBs). This article presents ovalbumin (OVA) as a multifunctional electrolyte additive for aqueous ZIBs. Experimental characterizations and theoretical calculations reveal that the OVA additive can replace the solvated sheath of recombinant hydrated Zn through the coordination water, preferentially adsorb on the surface of the Zn anode, and construct a high-quality self-healing protective film. Notably, the OVA-based protective film with strong Zn affinity will promote uniform Zn deposition and inhibit side reactions. As a result, Zn||Zn symmetrical batteries in ZnSO electrolytes containing OVA achieve a cycle life exceeding 2200 h. Zn||Cu batteries and Zn||MnO (2 A g) full batteries show excellent cycling stability for 2500 cycles, demonstrating promising application prospects. This study provides insights into utilizing natural protein molecules to modulate the kinetics of Zn diffusion and enhance the stability of the anode interface.
枝晶的不受控制的生长和严重的副反应，如析氢和腐蚀，极大地阻碍了水系锌离子电池（ZIBs）的工业应用和发展。本文提出了卵清蛋白（OVA）作为水系 ZIBs 的多功能电解质添加剂。实验表征和理论计算表明，OVA 添加剂可以通过配位水取代重组水合 Zn 的溶剂化鞘，优先吸附在 Zn 阳极表面，并构建高质量的自修复保护膜。值得注意的是，具有强 Zn 亲和力的基于 OVA 的保护膜将促进均匀的 Zn 沉积并抑制副反应。结果，在含有 OVA 的 ZnSO 电解液中，Zn||Zn 对称电池的循环寿命超过 2200 小时。Zn||Cu 电池和 Zn||MnO（2 A g）全电池在 2500 次循环中表现出优异的循环稳定性，显示出有前景的应用前景。本研究提供了利用天然蛋白质分子调节 Zn 扩散动力学和增强阳极界面稳定性的见解。
