High-performance aqueous rechargeable potassium batteries prepared via interfacial synthesis of a Prussian blue-carbon nanotube composite

• DOI: 10.1016/j.electacta.2020.136243
• Publication Date: 2020-04-16T19:51:58Z
• Authors: Samantha Husmann; Aldo J.G. Zarbin; Robert A.W. Dryfe
• Keywords: Prussian blue; Carbon fibers

Aqueous rechargeable batteries are sustainable energy storage devices with the potential to replace current state-of-the-art organic phase secondary batteries. Electrode materials for often based on composite structures, which combine an electronically conducting scaffold ionic conductor, whose properties define battery capacity. Optimal integration of these components can be challenging: here we describe a novel approach prepare electrode growth at liquid-liquid interface. This is illustrated synthesis carbon nanotube/Prussian blue nanocomposite as free-standing transparent thin films, applied cathodes aqueous potassium Prussian synthesized through acid-induced decomposition ferricyanide, promoted by interfacial electron transfer from donor (1,1′-dimethylferrocene) under ambient conditions. The yields selective cubic crystals nanotube walls, enhancing interaction between and components, resulting in self-assembled film liquid/liquid films readily transferred flexible membranes K+ battery. Coin-cell activated anodes gave capacity 47.6 mAh g−1 0.25 A density 33.75 Wh kg−1