posted on 2021-10-07, 06:43authored byHongrun Jin, Yongxin Luo, Bei Qi, Kaisi Liu, Quanji Wang, Bin Yao, Hao Li, Wei Xiong, Liang Huang, Jun Zhou, Zaiping Guo
Rechargeable
aqueous Zn-ion batteries (ZIBs) represent a promising
energy storage technology due to their high theoretical capacity,
intrinsic security, and low cost. However, the practical applications
of ZIBs have been considerably hindered by the poor stability of Zn
anodes, caused by the undesired dendrites and side reactions. Herein,
we present an interfacial engineering strategy to address these issues
via in situ tuning the surface texture through a laser-micromachining
method. The as-prepared Zn anode shows a periodic grid array architecture
with a rough surface. This unique structure enhances the interfacial
wettability and optimizes the mass transfer kinetics of Zn plating/stripping.
In addition, a large number of Zn nanoparticles could serve as nucleation
sites to regulate uniform Zn deposition. As a result, the engineered
Zn array anode enables a remarkably ultralong cycling life of 2500
h at 10 mA cm–2 (areal capacity of 2 mA h cm–2) with a benchmark cumulative capacity of 12.5 A h
cm–2. The hybrid supercapacitor based on the Zn
array anode and activated carbon (AC) cathode further demonstrates
its superior stability, showing no capacity loss after 20 000
cycles. This interfacial engineering strategy with mass production
possibility can also be applied to other metal electrodes, holding
a great promise for durable energy storage systems.