Fu Meng, Yu Huaming, Huang Shaozhen, Li Quanyu, Qu Baihua, Zhou Liangjun, Kuang Gui-Chao, Chen Yuejiao, Chen Libao
State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, People's Republic of China.
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, People's Republic of China.
Nano Lett. 2023 Apr 26;23(8):3573-3581. doi: 10.1021/acs.nanolett.3c00741. Epub 2023 Apr 12.
The commercialization pace of aqueous zinc batteries (AZBs) is seriously limited due to the uncontrolled dendrite growth and severe corrosion reaction of the zinc anode. Herein, a universal and extendable saturated fatty acid-zinc interfacial layer strategy for modulating the interfacial redox process of zinc toward ultrastable Zn metal anodes is proposed. The in situ complexing of saturated fatty acid-zinc interphases could construct an extremely thin zinc compound layer with continuously constructed zincophilic sites which kinetically regulates Zn nucleation and deposition behaviors. Furthermore, the multifunctional interfacial layer with internal hydrophobic carbon chains as a protective layer is efficient to exclude active water molecules from the surface and efficiently inhibit the surface corrosion of zinc. Consequently, the modified anode shows a long cycle life of over 4000 h at 5 mA cm. In addition, the assembled Zn||VO full cells based on modified zinc anodes have excellent rate performance and long cycle stability.
由于锌负极存在枝晶生长失控和严重的腐蚀反应，水系锌电池（AZBs）的商业化进程受到严重限制。在此，提出了一种通用且可扩展的饱和脂肪酸-锌界面层策略，用于调节锌的界面氧化还原过程，以实现超稳定的锌金属负极。饱和脂肪酸-锌界面相的原位络合可以构建一层极薄的锌化合物层，该层具有连续构建的亲锌位点，从动力学上调节锌的成核和沉积行为。此外，具有内部疏水碳链作为保护层的多功能界面层能够有效地将活性水分子排除在表面之外，并有效抑制锌的表面腐蚀。因此，改性后的负极在5 mA cm下表现出超过4000 h的长循环寿命。此外，基于改性锌负极组装的Zn||VO全电池具有优异的倍率性能和长循环稳定性。
