Gwanho Kim, Jae Young Seok, Yeon Uk Kim, Sin Kwon, Hyuntae Kim, Yu Mi Woo, Wooseok Yang, Jung Hwan Park*, Cheolmin Park* and Kyoohee Woo*,
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引用次数: 0
Abstract
Three-dimensional porous nanoarchitectures on current collectors are effective for stabilizing Li metal anodes. However, developing these nanostructures in a simple and cost-effective manner is challenging. To address this, we propose a flashlight-based ultrafast and scalable method for manipulating nanoarchitectures on Cu foil. Cu(OH)2 nanorods directly grown on Cu foil that are exposed to a flashlight can be photothermally activated to undergo ultrafast phase conversion to a mixed phase of Cu and CuxO while minimizing their structural collapse. The transformed hybrid nanorods have a sufficient pore volume, a large lithiophilic surface, and efficient electrical conduction to stabilize the lithium anode, thereby improving the long-term cycling stability and rate performance of the Li metal battery. Notably, capacity retention is observed to be ∼96% after 200 cycles at 0.5 C and ∼70% of its maximum capacity under a high-rate condition (5 C). Our simple approach enables ultrafast, large-area fabrication of nanoarchitectures that can stabilize the Li metal anode. We believe that further development in conjunction with a roll-to-roll process will accelerate the commercialization of Li metal batteries.
期刊介绍:
ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.