Xiao Xiaofen, Wang Deqiang, Xu Guangyi, Zhang Zhuxiang, Li Jun, Wang Shun, Yuan Yifei, Hu Chuangang, Jin Huile
Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China.
Zhejiang Engineering Research Center for Electrochemical Energy Materials and Devices, Institute of New Materials and Industrial Technologies, Wenzhou University, Wenzhou, Zhejiang 325035, China.
Nanoscale. 2024 Sep 26;16(37):17412-17418. doi: 10.1039/d4nr02385d.
It is difficult to achieve fast kinetics of Zn(HO) desolvation as well as HER inertia at the same electrolyte/Zn interface during long-term cycling of Zn plating/stripping in aqueous Zn-ion batteries. Herein, an effective interface construction strategy with hydrophilic transition metal oxides was proposed to achieve that balance using a CeO layer coating. The hydrophilic CeO layer can bring a balance between improving the access to the anode surface for Zn(HO) electrolyte ions, providing uniform Zn nucleation sites and HER inertia. What's more, Zn corrosion can be significantly inhibited benefiting from this coating layer. The efficiency of aqueous Zn-ion batteries showed a great enhancement. Ultra-long plating/stripping stability up to 1600 h and excellent recovery (returning to 0.5 from 20 mA cm) for the symmetric CeO@Zn system were observed. A full cell with the MnO cathode (CeO@Zn//MnO) with good reversibility and stability (∼600 cycles) was fabricated for practical application. Our work provides a fundamental understanding and an essential solution to deal with the balance between rapid desolvation and inhibition of the hydrogen evolution reaction, which is important for promoting the practical application of rechargeable Zn batteries.
在水系锌离子电池中锌的电镀/剥离长期循环过程中，要在同一电解质/锌界面实现Zn(HO)去溶剂化的快速动力学以及析氢惰性是很困难的。在此，提出了一种使用亲水性过渡金属氧化物的有效界面构建策略，通过CeO层涂层来实现这种平衡。亲水性CeO层可以在改善Zn(HO)电解质离子到达阳极表面的通道、提供均匀的锌成核位点和析氢惰性之间实现平衡。此外，得益于该涂层，锌腐蚀可得到显著抑制。水系锌离子电池的效率有了很大提高。观察到对称的CeO@Zn体系具有高达1600小时的超长电镀/剥离稳定性以及出色的恢复能力（从20 mA cm恢复到0.5）。为了实际应用，制备了具有MnO阴极的全电池（CeO@Zn//MnO），其具有良好的可逆性和稳定性（约600次循环）。我们的工作为处理快速去溶剂化和抑制析氢反应之间的平衡提供了基本认识和重要解决方案，这对于推动可充电锌电池的实际应用很重要。
