Abstract
Sodium metal, with its impressive electrochemical properties, including a high specific capacity of 1166 mAhg−1 and a low redox potential of −2.71 V vs SHE, emerges as a compelling option for battery anodes. However, the dendrites formed during subsequent charging/discharging cycles severely limit its practical implementation. Here, we report the ability of hexagonal boron nitride (hBN) coated polypropylene separator to suppress the dendritic deposition. The tailored separator manifests improved wettability and stable electrochemical performance under limited Na availability. The improved performance is ascribed to the sodiophilic character of hBN, which is expected to provide uniform Na+ flux and exhibit a guiding effect for uniform Na deposition. This study aims to report the use of a hBN coated separator for mitigating Na dendrites; however, comprehensive research is required to properly evaluate the pragmatic application of the proposed strategy in metal batteries.
Funder
Science and Engineering Research Board
Publisher
The Electrochemical Society
Subject
Materials Chemistry,Electrochemistry,Surfaces, Coatings and Films,Condensed Matter Physics,Renewable Energy, Sustainability and the Environment,Electronic, Optical and Magnetic Materials