Chen Wanhao, Zhu Changhao, Xu Xinnan, Liu Xuejun
College of Chemistry and Chemical Engineering, State Key Laboratory of Bio-fibers and Eco-textiles, Qingdao University Qingdao 266071 China
School of Chemistry and Chemical Engineering, Nantong University Nantong 226019 China.
RSC Adv. 2024 Jun 13;14(27):19090-19095. doi: 10.1039/d4ra03632h. eCollection 2024 Jun 12.
Perfluoro-1-butanesulfonic acid (PFBS) was used to etch on the surface of a zinc anode to introduce a 3D CFOS-Zn interface layer with unique fluorine groups (Zn@PFBS) to inhibit the formation of dendrites. The C-F chains in the Zn@PFBS coating enhance the anode hydrophobicity of the zinc metal, which not only suppresses the HER of the surface of the zinc metal, but also strengthens the corrosion resistance of the zinc metal. Meanwhile, -SO in the coating enhanced the binding energy with Zn, which acted as a nucleation site on the surface of the zinc anode to induce the uniform deposition of Zn and inhibited the disordered growth of zinc dendrites. As a result, the symmetric battery assembled with the Zn@PFBS anode achieved a stable cycling of 6200 cycles at 5 mA cm to 1 mA h cm. Meanwhile, the Zn@PFBS anode exhibited a higher cycling performance with a capacity retention rate of 78.6% after 1000 cycles in a Zn@PFBS//NaVO (NVO) full cell.
全氟-1-丁烷磺酸（PFBS）用于在锌阳极表面进行蚀刻，以引入具有独特氟基团的3D CFOS-Zn界面层（Zn@PFBS）来抑制枝晶的形成。Zn@PFBS涂层中的C-F链增强了锌金属的阳极疏水性，这不仅抑制了锌金属表面的析氢反应（HER），还增强了锌金属的耐腐蚀性。同时，涂层中的-SO增强了与Zn的结合能，其作为锌阳极表面的成核位点，诱导Zn的均匀沉积并抑制锌枝晶的无序生长。结果，采用Zn@PFBS阳极组装的对称电池在5 mA cm至1 mA h cm的电流密度下实现了6200次循环的稳定循环。同时，在Zn@PFBS//NaVO（NVO）全电池中，Zn@PFBS阳极在1000次循环后表现出更高的循环性能，容量保持率为78.6%。
