Zhang Zhilong, Yan Suxia, Dong Hongyu, Li Taofeng, Liu Junfeng, Song Xiaohui, Huixiang Ang Edison, Wang Quan, Wang Yong
School of Mechanical Engineering, and Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China.
School of Materials Science and Engineering, Hefei University of Technology, Anhui 230009, PR China.
J Colloid Interface Sci. 2025 Jan;677(Pt A):885-894. doi: 10.1016/j.jcis.2024.08.022. Epub 2024 Aug 8.
Zinc metal anodes encounter significant challenges, including dendrite growth, hydrogen evolution, and corrosion, all of which impede the rate capability and longevity of aqueous zinc-ion batteries (AZIBs). To effectively tackle these issues, we introduced Tween-80 into the traditional ZnSO electrolyte as an additive. Tween-80 possesses electronegative oxygen atoms that enable it to adsorb onto the zinc (Zn) anode surface, facilitating the directional deposition of Zn metal along the (002) orientation. The hydroxyl and ether groups within Tween-80 can displace some of the coordinated water molecules in the Zn inner solvation shell. This disruption of the hydrogen bond network regulates the solvation structure of Zn ions and suppresses the possibility of hydrogen evolution. Moreover, the long hydrocarbon chain present in Tween-80 exhibits excellent hydrophobic properties, aiding in the resistance against corrosion of the Zn anode by water molecules and reducing hydrogen evolution. Consequently, a symmetric cell equipped with the Tween-80 additive can cycle stably for over 4000 h at 1 mA cm and 1 mA h cm. When paired with the VO cathode, the full cell demonstrates a high-capacity retention rate exceeding 80 % over 1000 cycles at a current density of 2 A g. This study underscores the advantages of utilizing non-ionic surfactants for achieving high-performance aqueous zinc-ion batteries.
锌金属阳极面临着重大挑战，包括枝晶生长、析氢和腐蚀，所有这些都阻碍了水系锌离子电池（AZIBs）的倍率性能和寿命。为了有效解决这些问题，我们将吐温80作为添加剂引入传统的ZnSO电解质中。吐温80具有带负电的氧原子，使其能够吸附在锌（Zn）阳极表面，促进锌金属沿（002）取向的定向沉积。吐温80中的羟基和醚基可以取代锌内溶剂化壳层中的一些配位水分子。氢键网络的这种破坏调节了锌离子的溶剂化结构，并抑制了析氢的可能性。此外，吐温80中存在的长烃链表现出优异的疏水性能，有助于抵抗水分子对锌阳极的腐蚀并减少析氢。因此，配备吐温80添加剂的对称电池在1 mA cm和1 mA h cm下可以稳定循环超过4000小时。当与VO阴极配对时，全电池在2 A g的电流密度下经过1000次循环后显示出超过80%的高容量保持率。这项研究强调了利用非离子表面活性剂实现高性能水系锌离子电池的优势。
