Duan Junwen, Dong Jiaming, Cao Ruirui, Yang Hao, Fang Kangkang, Liu Ying, Shen Zhitao, Li Fumin, Liu Rong, Li Huilin, Chen Chong
Henan Key Laboratory of Photovoltaic Materials, College of Future Technology, Henan University, Kaifeng, 475000, P. R. China.
Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China.
Adv Sci (Weinh). 2023 Oct;10(29):e2303343. doi: 10.1002/advs.202303343. Epub 2023 Aug 13.
Metallic zinc electrode with a high theoretical capacity of 820 mAh g is highly considered as a promising candidate for next-generation rechargeable batteries. However, the unavoidable hydrogen evolution, uncontrolled dendrite growth, and severe passivation reaction badly hinder its practical implementations. Herein, a robust polymer-alloy artificial protective layer is designed to realize dendrite-free Zn metal anode by the integration of zincophilic SnSb nanoparticles with Nafion. In comparison to the bare Zn electrode, the Nafion-SnSb coated Zn (NFSS@Zn) electrode exhibits lower nucleation energy barrier, more uniform electric field distribution and stronger anti-corrosion capability, thus availably suppressing the Zn dendrite growth and interfacial side reactions. As a consequence, the NFSS@Zn electrode exhibits a long cycle life over 1500 h at 1 mA cm with an ultra-low voltage hysteresis (25 mV). Meanwhile, when paired with a MnO cathode, the as-prepared full cell also demonstrates stable performance for 1000 cycles at 3 A g . This work provides an inspired approach to boost the performance of Zn anodes.
具有820 mAh g高理论容量的金属锌电极被高度认为是下一代可充电电池的有前途的候选者。然而，不可避免的析氢、不受控制的枝晶生长和严重的钝化反应严重阻碍了其实际应用。在此，通过将亲锌的SnSb纳米颗粒与Nafion集成，设计了一种坚固的聚合物合金人工保护层，以实现无枝晶的锌金属阳极。与裸锌电极相比，Nafion-SnSb涂层锌（NFSS@Zn）电极表现出更低的成核能垒、更均匀的电场分布和更强的抗腐蚀能力，从而有效地抑制了锌枝晶的生长和界面副反应。因此，NFSS@Zn电极在1 mA cm下表现出超过1500小时的长循环寿命，具有超低的电压滞后（25 mV）。同时，当与MnO阴极配对时，所制备的全电池在3 A g下也能稳定循环1000次。这项工作为提高锌阳极的性能提供了一种有启发性的方法。
